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TDA7514
SINGLE-CHIP FM/AM TUNER WITH STEREO DECODER AND AUDIO PROCESSOR
1

FEATURES
AM/FM WORLD TUNER FOR CAR-RADIO INTEGRATED IMAGE REJECTION FM MIXER INTEGRATED TUNING PLL VARIABLE-BANDWITH FM IF FILTER (ISS) FULLY INTEGRATED FM STEREO DECODER FULLY INTEGRATED FM/AM NOISE BLANKER HIGHLY INTEGRATED AUDIO PROCESSOR
Figure 1. Package
TQFP80
Table 1. Order Codes
Part Number E-TDA7514 E-TDA7514TR
E- prefix indicates lead free package
Package TQFP80 TQFP80 in Tape & Reel
2
DESCRIPTION
The TDA7514 is a device for car-radio applications that combines full RF front-end functions with advanced audio-processing capabilities. As far as FM and AM functions are concerned, the TDA7514 features front-end processing, including the digital tuning PLL. IF processing with demodulation and variable-bandwidth IF filtering (ISS), stop station and quality detection functions, FM stereo decoding by means of a fully integrated adjustment-free dedicated PLL and, finally, AM and FM noise blanking (AM noise blanking comprises one IF NB as well as an audio NB). The FM stereo decoder and the noise blanking functions are realised entirely without external components. The FM front-end circuit features an image-rejection mixer that allows the simplification of the external preselection filter, and a very low noise level that allows getting rid of the external preamplifier with no loss in sensitivity. A 6 bit on-
board ADC makes a digitised version of the Smeter available to the P via I2Cbus. The audio processor section comprises input selectors for one stereo single-ended source, one stereo quasi-differential source and a mono differential source. Volume, loudness, tone (bass and treble), balance and fading controls are available with completely pop-free operation to drive four output channels. An additional input independently mixable on each of the four outputs is provided for chime. A soft mute function and an RDS mute function are included to handle source change as well as RDS AF search without abrupt changes in the audio level. Most of the parameters in the front-end section are I2Cbus-driven and therefore under the control of the car-radio maker. The I2Cbus allows furthermore the user to realise the full electric alignment of all the external coils.
June 2005
Rev. 1 1/74
TDA7514
Figure 2. Block Diagram
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GND
TDA7514
Table 2. Pin Description
N 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 Pin VREF5V TUNGND AMMIX1IN+ AMMIX1INAMAGC1TC AMAGC1IOUT AMAGC1VOUT FMMIX1IN+ RFGND FMMIX1INFMAGCTC FMAGCIOUT GND FMADJOUT VCOC OSCGND VCOB OSCVCC LFOUT LFREF LFINAM LFINFM LFHC PLLGND PLLVCC XTALG XTALD DIGGND DIGVCC QUALMPOUT/ISSBW QUALACMPOUT ISSTC DEVTC VREF3V APGND APVCC OUTRR OUTRL OUTFR OUTFL 5V reference tuner general ground am mix1 input am mix1 input am agc1 filter capacitor am agc1 current output am agc1 voltage output fm mix1 input rf ground fm mix1 input fm agc detector time constant fm agc current output ground fm antenna filter adjustment am/fm vco collector vco ground am/fm vco base vco supply (8V) PLL loop filter output PLL loop filter reference PLL AM loop filter input PLL FM loop filter input PLL loop filter high-current input PLL back-end ground PLL back-end supply ref osc gate ref osc drain digital ground digital dirty supply (8V) multipath det output / ISS BW indicator multipath det / adjacent channel det output ISS time constant deviation detector time constant 3V reference audio processor/stereo decoderground audio processor/stereo decoder supply (8V) audio out audio out audio out audio out Function
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Table 2. Pin Description
N 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 Pin CHIMEIN ACRIN ACROUT ACLIN ACLOUT PH+ PHPB_L PB_R AUXR AUXCOM AUXL TUNERIN TUNEROUT AUDIOMUTE SD / IFCOUT / ARSOUT SDA SCL SMETEROUT DEMGND AMIF2AMPIN SMETERTC FMDEMREF AMIF2AMPREF SNCTC AMAGC2TC AMMIX2OUTAMMIX2OUT+ FMMIX2INFMMIX2IN+ FMIFAMP2OUT FMIFAMP2IN TUNVCC FMIFAMPREF/AMIF2REF FMIFAMP1OUT FMIFAMP1IN/AMMIX2IN IF1GND MIX1OUTMIX1OUT+ IF1VCC chime input ac coupling right input ac coupling right output ac coupling left input ac coupling left output phone in + phone in tape in left tape in right audio aux in right audio aux in common audio aux in left am audio/fm mpx input am audio/fm mpx output audio processor mute control am/fm station detector output / IF counter output / ARS MPX output I2C bus data I2C bus clock filtered / unfiltered Smeter output fm demodulator ground am if2 amp input am/fm smeter filtering capacitor fm demodulator reference capacitor am if2 amp feedback capacitor SNC detector time constant am agc2 filter capacitor am mix2 output am mix2 output fm mix2 input fm mix2 input fm if1 amp2 output fm if1 amp2 input tuner general supply (8V) fm if1 amps reference capacitor/am if2 reference voltage fm if1 amp1 output fm if1 amp1 input/am mix2 in if1 ground am/fm mix1 output am/fm mix1 output if1 supply (8V) Function
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3
ELECTRICAL CHARACTERISTCS
3.1 FM (Vcc = 8.5V; Tamb= 25C; Vant,in= 60dBload; fc=98.1MHz; fdev = 40kHz; fmod=1KHz; IF1amp1=25dB; IF1amp2=15dB; Filter @TUNEROUT:IEC_TUNER+Deemphasis=50s, unless otherwise specified) Table 3.
Symbol Parameter Test Condition Min Typ Max Unit
General (measured at audioprocessor output with de-emphasis and high cut active, ISS set to 80 KHz BW) US SNR LS THD Usable sensitivity Signal to Noise ratio Limiting Sensitivity Total Harmonic Distortion -3dB_point, SoftMute Off fdev = 40kHz fdev = 75kHz Vout ISN IFCS Icctun Iccmix1 Iccif1 Iccosc Iccpll Iccdig IQ Mixer 1 RIN VIN Gm IIP3 IQG IQP IRR Input Resistance Input DC Bias Transconductance Input IP3 IQ Gain Adjustment IQ Phase Adjustment Image Rejection Ratio without adjustment adjusted Gvmix1 Gain from input (single-ended) to IFT1 out differential -1 -7 30 42 22 Differential @pin 8, pin 10 6 2.3 17 108 +1 +8 k V mS dBV % C dB dB dB Output Level Interstation Noise IF Counter Sensitivity DC Supply Current@TUNVCC DC Supply Current@IFT1 DC Supply Current@IF1VCC DC Supply Current@OSCVCC DC Supply Current@PLLVCC DC Supply Current@DIGVCC @TUNEROUT Delta Vout@RF OFF, Soft Mute OFF S/N=40dB 0 65 -2.5 0.26 0.36 243 -8.5 0 80 5 10 10 3 7 dBVload dB dBVload % % mVrms dB dBVload mA mA mA mA mA mA
IFT1 Adjustment Cift1min IFT1 Adjustment Capacitor Minimum Between MIX1OUT+ and MIX1OUT2.3 pF
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Table 3. (continued)
Symbol Cift1max Cift1step Parameter IFT1 Adjustment Capacitor Maximum IFT1 Adjustment Capacitor Step Test Condition Between MIX1OUT+ and MIX1OUTBetween MIX1OUT+ and MIX1OUTMin Typ 20.1 1.3 Max Unit pF pF
RFT Adjustment Vrftadjmin Vrftadjmax Vrftadjstep VRFT0 Voutmax Voutmin Output voltage maximum Output voltage minimum RFT Adjustment Minimum RFT Adjustment Maximum RFT Adjustment Step @T6<0:7>=[00000000] TVIN=3V @ T6<0:7>=[11111111] TVIN=3V TVIN=3V, VRFTadjstep=TVIN/128 @ T6<0:7>=[11000001] TVIN=3V VCC-0.4 0.4 5.9 23 3 8.1 0.4 V V mV V V V
Wide Band RF AGC (input: FMMIXER1in+ and FMMIXER1IN-) WAGCspL Lower Threshold Start (Set 1) ("min" not used) Level at FMMIXER1IN+ @V12=100mV IFT1 primary is shorted and is connected to GND with 56nF Level at FMMIX1IN+ @V12=100mV IFT1 primary is shorted and is connected to GND with 56nF 66.8 dBV
WAGCspH
Higher Threshold Start (Set max)
83.5
dBV
Wide Band Keying AGC ( Controlled by FiltSMeter1ms ) WAGCK AGC Start (Set 1) shift Shifted level of AGC Starting point at FMMIX1IN+ when VSMeter changes from Vkey to Vkey-450mV when V12 changes to 90mV from 100mV (Set 1) -12 dB
Vkey
Vsmeter at Keyed AGC start
1.71
V
Narrow Band IF AGC (input: FMMIXEROUT+ and FMMIXER1OUT-) NAGCspL NAGCspH Lower Threshold Start (Set 1) ("min" not used) Higher Threshold Start (Set max) Level of IF1 at FMMIX1OUT+ @V12=100mV Level of IF1 at FMMIX1OUT+ @V12=100mV WAGC set to max 90.2 109 dBV dBV
RF AGC Pin Diode Driver Out Ioutmin Ioutmax Minimum Maximum AGCOFF AGCON; total @330 @2.2K 10.1 8.8 1.35 0.1 A mA mA mA
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Table 3. (continued)
Symbol Parameter Test Condition Min Typ Max Unit
FMIF1AMP1 and FMIF1AMP2 Gv1min Gv1max IIP3a1 Rin1 Rout1 Gv2min Gv2max IIP3a2 Rin2 Rout2 AMP1 Minimum Gain AMP1 Maximum Gain AMP1 input-referred IP3 Input Impedance of AMP1 Output Impedance of AMP1 AMP2 Minimum Gain AMP2 Maximum Gain AMP2 input-referred IP3 Input Impedance of AMP2 Output Impedance of AMP2 Source and load impedance: 330ohm. Source and load impedance: 330ohm. Source and load impedance: 330ohm. Source and load impedance: 330ohm. 19 25 TBD 330 330 7 15 TBD 330 330 dB dB dBV dB dB dBV
FMMIXER2 (output not accessible) Gvmix2 Rinmix2 Gain (Single-ended output) Input Impedance Source impedance: 330ohm. 12.3 330 dB
FMLIMITER (450KHz) (output not accessible) Gvlim Gain (To Demod_IN from FMMIXER2out+) TBD dB
FM Filtered Smeter (Mod:off , Slider: 0) VFSM1 VFSM2 VFSM3 FSMR1 FSMR2 CLVFSM TCsm1 TCsm2 Filtered Smeter1 Filtered Smeter2 Filtered Smeter3 Filtered Smeter resistor Filtered Smeter resistor Clamped voltage Time constant1 Time constant2 T16<5>= 0 T16<5>= 1 @FMMIX2IN=50dBV @FMMIX2IN=70dBV @FMMIX2IN=90dBV T16<5>= 0 T16<5>= 1 1.44 2.47 3.96 200 21 5 10 0.9 V V V k M V ms s
FM Smeter Slider SLSTEP SLMAX SLMIN Slider step Maximum Slider Minimum Slider @VFSM=2.6V @VFSM=2.6V 38 1.16 -1.18 mV V V
ISS (Intelligent Selectivity System) Filter Fcenter Center Frequency 450 kHz
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Table 3. (continued)
Symbol Fc120BW3 Fc120BW20 Fc80BW3 Fc80BW20 Fc20BW3 Fc20BW20 Fmin Parameter Fcenter=120KHz, @-3dB,BW Fcenter=120KHz, @-20dB,BW Fcenter=80KHz, @-3dB,BW Fcenter=80KHz, @-20dB,BW Fcenter=20KHz, @-3dB,BW Fcenter=20KHz, @-20dB,BW Fcenter Fine adjust minimum Test Condition @ISS 120KHz @ISS 120KHz @ISS 80KHz @ISS 80KHz @ISS 20KHz @ISS 20KHz Min Typ 120 250 80 150 25 75 -20 Max Unit kHz kHz kHz kHz kHz kHz kHz
ISS Filter Time Constant Ichal1 Ichah1 Ichal2 Ichah2 Idischal Idischahl VISSTCL VISSTCH Charge current low Charge current high Charge current low Charge current high Discharge current low Discharge current high ISSTC Low ISSTC High @Weak adjacent @Weak adjacent @Strong adjacent @Strong adjacent 60 74 110 124 1 15 0.1 4.9 A A A A A A V V
ISS Filter Switch Threshold V120on V120off V80on V80off Threshold for ISS120on Threshold for ISS120off Threshold for ISS80on Threshold for ISS80off 3 1 4 2 V V V V
Adjacent Channel detector for ISS (input: Smeter unfiltered) FcenterAC1 FcenterAC2 FcenterAC3 FcenterAC4 Gacmin Gacmax Vacl Vach Vthacl Vthach Filter1 cutoff , T22<1:0>=00 Filter2 center, T22<1:0>=01 Filter3 center, T22<1:0>=10 Filter4 center, T22<1:0>=11 Gain minimum Gain maximum Output voltage low Output voltage high Threshold for weak adjacent low Threshold for weak adjacent high HP(106KHz)+HP(100KHz) BP(100KHz)+HP(144KHz) BP(204KHz)+BP(100KHz) BP(100KHz)+BP(144KHz) 130 100 177 101 23 29 3.0 4.9 3.25 3.95 kHz kHz kHz kHz dB dB V V V V
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Table 3. (continued)
Symbol Vthacstep ACl ACh ACstep ACdesen1 ACdesen2 ACdesen3 ACdesen4 Slop1 Slop2 Slop3 Slop4 Parameter Threshold for weak adjacent step Differential Vthreshold between weak and strong adjacent low Differential Vthreshold between weak and strong adjacent high Differential Vthreshold between weak and strong step Desens Th1 Desens Th2 Desens Th3 Desens Th4 AC/Vsmeter1 AC/Vsmeter2 AC/Vsmeter3 AC/Vsmeter4 Vsmeter at starting desens Vsmeter at starting desens Vsmeter at starting desens Vsmeter at starting desens T22<6:5>=00 T22<6:5>=01 T22<6:5>=10 T22<6:5>=11 Test Condition Min Typ 100 0 300 100 0.25 0.83 1.42 2.0 -2.7 -3.3 -5 -10 Max Unit mV mV mV mV V V V V
Multipath Channel detector for ISS ( input: Smeter unfiltered+Buffer) FcenterMP Qmp FiltGv1 FiltGv2 FiltGv3 FiltGv4 Grect1 Grect2 Grect3 Grect4 Vmpl Vmph Vthmp1 Vthmp2 Vthmp3 Vthmp4 BPF center Quality factor of BPF Gain1 of BPF Gain2 of BPF Gain3 of BPF Gain4 of BPF Rectifier Gain1 Rectifier Gain2 Rectifier Gain3 Rectifier Gain4 Output voltage low Output voltage high Threshold level1 Threshold level2 Threshold level3 Threshold level4 T25<1:0>=00 T25<1:0>=01 T25<1:0>=10 T25<1:0>=11 T25<3:2>=00 T25<3:2>=01 T25<3:2>=10 T25<3:2>=11 19 8.5 -7 4 7 10 6 12 18 22 3.0 4.9 3.49 3.74 4.06 4.31 dB dB dB dB dB dB dB dB V V V V V V kHz
Deviation detector for ISS (input: Demodulator output) FcDev Cutoff Frequency of MPX LPF (2nd order) 10 kHz
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Table 3. (continued)
Symbol Gvlpf Idischarl Idischarh Idischarstep Vth1 Vth2 Vth3 Vth4 Rdev1 Rdev2 Rdev3 Rdev4 DEVdesens1 DEVdesens2 Parameter Gain of LPF discharge current low at DEVTC discharge current high at DEVTC discharge current step at DEVTC Low threshold1 Low threshold2 Low threshold3 Low threshold4 Ratio of Vthreshold between strong and high deviation Ratio of Vthreshold between strong and high deviation Ratio of Vthreshold between strong and high deviation Ratio of Vthreshold between strong and high deviation Offset1 for Vsoftmute for desens Offset2 for Vsoftmute for desens Vthhighdev/Vthdev Vthhighdev/Vthdev Vthhighdev/Vthdev Vthhighdev/Vthdev referred to soft mute threshold referred to soft mute threshold Test Condition Min Typ 14 6 20 2 15 20 28 44 1 1.3 1.4 1.5 50 150 mV mV Max Unit dB A A A kHzdev kHzdev kHzdev kHzdev
Field Strength ISS ( FSISS ) Vthisissl Vthisissh Vthisissstep Low offset for Vthsm of softmute by Smeter(1ms) High offset for Vthsm of softmute by Smeter(1ms) Step offset for Vthsm of Softmute by Smeter(1ms) referred to soft mute threshold referred to soft mute threshold -467 +467 67 mV mV mV
SoftMute by Smeter Vthsm1 Vthsm2 Vthsm3 Vthsm4 Attsmmax Attsmmin Attsmstep Threshold level1 Threshold level2 Threshold level3 Threshold level4 Maximum attenuation Minimum attenuation Step attenuation T14<1:0>=00 T14<1:0>=01 T14<1:0>=10 T14<1:0>=11 0.3 0.4 1.6 1.8 21.5 4.5 2.5 V V V V dB dB dB
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Table 3. (continued)
Symbol Parameter Test Condition Min Typ Max Unit
SoftMute by Adjacent Channel Detector Vthsmac1 Vthsmac2 Attsmac1 Attsmac2 Attsmac3 Attsmac4 Threshold level1 Threshold level2 Attenuation1 Attenuation2 Attenuation3 Attenuation4 T14<2>=0 T14<2>=1 T14<7:6>=00 T14<7:6>=01 T14<7:6>=10 T14<7:6>=11 2.75 3.25 0 6 9 12 V V dB dB dB dB
Station Detector by Smeter VSDl VSDh Vthsdmin Vthsdmax Vthsdstep Low output level High output level Threshold level minimum Threshold level maximum Threshold level step @SDpin @SDpin T20<3:0>=0000 T20<3:0>=1111 0 5 0.4 3.4 0.2 V V V V V
Adjacent Channel Detector for Quality outputs, SNC and HCC F1ac1 F1ac2 F2ac1 F2ac2 GcF2ac1 GcF2ac2 Vrect1 Vrect2 Vrect3 Vrect4 Cutoff or center frequency of filter1 Cutoff or center frequency of filter1 Cutoff or center frequency of filter2 Cutoff or center frequency of filter2 Gain of filter2 Gain of filter2 Offset1 of rectifier for SNC&HCC Offset2 of rectifier for SNC&HCC Offset3 of rectifier for SNC&HCC Offset4 of rectifier for SNC&HCC T8<4>=0 T8<4>=1 T8<5>=0 T8<5>=1 T18<7>=0 T18<7>=1 T18<5:4>=00 T18<5:4>=01 T18<5:4>=10 T18<5:4>=11 83 104 119 139 8.7 14.7 0.4 0.8 1.2 1.6 kHz kHz kHz kHz dB dB V V V V
Multipath Detector for Quality output, SNC and HCC (Filter shared with ISS multipath detector) Gvrectl Gvrecth Gvrectstep Rectifier Gain minimum Rectifier Gain maximum Rectifier Gain step T15<7:5>=000 T15<7:5>=111 5 13.4 1.2 dB dB dB
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Table 3. (continued)
Symbol Parameter Test Condition Min Typ Max Unit
Smeter Control for SNC and HCC Gvsml Gvsmh Gvsmstep Gain minimum Gain maximum Gain step T15<3:0>=000 T15<3:0>=111 0 2.25 0.15 dB dB dB
Quality_ACMPout (High output corresponds to good quality) Gqacmp1mp Gqacmp2mp Gqacmp3mp Gqacmp4mp Gqacmp1ac Gqacmp2ac Gqacmp3ac Gqacmp4ac Vqacmpmax Vqacmpmin Gain output level1 for multipath T25<5:4>=01 Gain output level2 for multipath T25<5:4>=10 Gain output level3 for multipath T25<5:4>=11 Gain output level4 for multipath T25<5:4>=00 Gain output level1 for adjacent channel Gain output level2 for adjacent channel Gain output level3 for adjacent channel Gain output level4 for adjacent channel Maximum output level Minimum output level T25<7:6>=01 T25<7:6>=10 T25<7:6>=11 T25<7:6>=00 -4 0 +4 -60 -4 0 +4 -60 5.0 0 dB dB dB dB dB dB dB dB V V
Quality_MPout (Low output corresponds to good quality) Vqacmax Vqacmin Maximum output level Minimum output level Roll off compensation for TUNEROUT Vc120 Vc80 Delta voltage between ISS120 ON and ISS OFF Delta voltage between ISS80 ON and ISS OFF @53KHz @53KHz 1 1 dB dB 5 0.9 V V
Weather Band Audio Gain Boost Gvwbbst Boosted gain 23.5 dB
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3.2 AM (Vcc = 8.5V; Tamb = 25C; Vsg = 74dBVemf; fc = 999KHz; Modulation level = 30%, fmod = 400Hz; 80O+20pF/65pF dummy antenna; Filter@TUNEROUT: IEC_TUNER + Deemphasis = 50us, unless otherwise specified). Table 4.
Symbol Parameter Test Condition Min Typ Max Unit
General (input level @SG emf) US SNR MS THD1 THD2 THD3 THD4 THDLF Vout ISN IFCS Icctun Iccmix1 Iccif1 Iccmix2 Iccosc Iccpll Iccdig Usable sensitivity Signal to Noise Ratio Maximum Sensitivity Total Harmonic Distortion1 Total Harmonic Distortion2 Total Harmonic Distortion3 Total Harmonic Distortion4 THD @ Low frequency Level of TUNEROUT Interstation noise level IF Counter Sensitivity DC Supply Current@TUNVCC DC Supply Current@IFT1 DC Supply Current@IF1VCC DC Supply Current@IFT2 DC Supply Current@OSCVCC DC Supply Current@PLLVCC DC Supply Current@DIGVCC MIXER1 Gv Conversion gain From AMMIXER1IN+ to IFT1; secondary loaded with 330 3.5 dB @Vout=-10dB, SoftMute:off mod=30%, VSG=74 dBVemf mod=80%, VSG=74 dBVemf mod=30%, VSG=120dBVemf mod=80%, VSG=120dBVemf mod=30%, fmod=100Hz TUNEROUT Vout @RF:off & SoftMute:off SNR=20dB 26 50 20 0.1 0.2 0.2 0.5 0.2 370 -35 10 85 5 10 2 8 5 10 dBVemf dB dBVemf % % % % % mVrms dB dBVemf mA mA mA mA mA mA mA
Rin IIP3mix1
Input resistance (differential) Input-referred IP3
1 130
K dBV
AGC1 Wide Band AGC (input: AMMIXER1in+ and AMMIXER1IN-; FEAGC in open-loop configuration) WAGCspl Starting point minimum Level at AMMIX1IN+ @IAGCOUT = 1A, RF=999KHz, Set=0 Level at AMMIX1IN+ @IAGCOUT = 1A, RF=999KHz, Set=31 94.4 dBV
WAGCsph
Starting point maximum
115.5
dBV
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Table 4. (continued)
Symbol Parameter Test Condition Min Typ Max Unit
AGC1 Narrow Band AGC (input: AMMIXER2in; FEAGC in open-loop configuration) NAGCspl Starting point minimum Level at AMMIX2IN @IAGCOUT = 1A IF1=10.7MHz, Set=0 Level at AMMIX2IN @IAGCOUT = 1A IF1=10.7MHz, Set=31 96.3 dBV
NAGCsph
Starting point maximum
117.0
dBV
AGC1 Ultra Narrow Band AGC (input: AMIF2IN+; FEAGC in open-loop configuration) UNAGCspl Starting point minimum Level at AMIF2IN @IAGCOUT =1uA IF2=450KHz, Set=0 Level at AMIF2IN @IAGCOUT =1uA IF2=450KHz, Set=15 69.6 dBV
UNAGCsph
Starting point maximum
76.9
dBV
AGC1 Output Ioutl Iouth Voutl Vouth Ragcvout Pindiode drive current minimum Pindiode drive current maximum Rfamp control voltage minimum Rfamp control voltage maximum Output resistance at VOUT AGCOFF AGCON AGCON AGCOFF 3.5 17 0.4 0.5 1 A mA V V k
AGC1 Time Constant Ragc1tc1 Ragc1tc2 AMMIXER2 Gmix2max IIP3mix2 Rmix2in AMIF2amplifier Gif2ampmin Gif2ampmax Gif2amp Rif2ampin min. gain , no AGC2 max. gain , no AGC2 AGC2 range Input resistance T29<7:4>=0010 T29<7:4>=1111 68 82 -40 2 dB dB dB k Conversion Gain Input-referred IP3 Input resistance From AMMIXER2in to IFT2 secondary loaded with 2k 8 140 2.4 dB dBV k Time constant FAST mode Time constant Normal mode Output resistance AMAGC1TCpin Output resistance AMAGC1TCpin 9 100 k k
SoftMute by Smeter Vthsm1 Threshold level1 T14<1:0>=00 0.3 V
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Table 4. (continued)
Symbol Vthsm2 Vthsm3 Vthsm4 Attsmmax Attsmmin Attsmstep Parameter Threshold level2 Threshold level3 Threshold level4 Maximum attenuation Minimum attenuation Step attenuation Test Condition T14<1:0>=01 T14<1:0>=10 T14<1:0>=11 Min Typ 0.4 1.6 1.8 21.5 4.5 2.5 Max Unit V V V dB dB dB
AM Filtered Smeter VFSM1 VFSM2 VFSM3 FSMR1 FSMR2 CLVFSM TCsm1 TCsm2 Filtered Smeter1 Filtered Smeter2 Filtered Smeter3 Filtered Smeter resistor Filtered Smeter resistor Clamped voltage Time constant1 Time constant2 T16<5>=0 T16<5>=1 @AMIF2AMPIN=50dBV @AMIF2AMPIN=70dBV @AMIF2AMPIN=90dBV T16<5>=0 T16<5>=1 0.8 2.2 4.4 200 21 5 10 0.9 V V V k M V ms s
AM Smeter Slider SLSTEP SLMAX SLMIN Slider step Maximum Slider Minimum Slider @VFSM=2.6V @VFSM=2.6V 40 1.23 -1.25 mV V V
AM Station Detector by Smeter VSDl VSDh Vthsdmin Vthsdmax Vthsdstep Low output level High output level Threshold level minimum Threshold level maximum Threshold level step @SD pin @SD pin T29<3:0>=0000 T29<3:0>=1111 0 5 0.3 2.55 0.15 V V V V V
AMAGC2 Time Constant Ragc2tc1 Ragc2tc2 AMIFNB Wgateifnb Voffset0 Voffset1 Voffset2 Voffset3 Width of gate Rectifier offset0 Rectifier offset1 Rectifier offset2 Rectifier offset3 T31<3:0>=0000 T31<3:0>=0001 T31<3:0>=0010 T31<3:0>=0011 12 0 46 100 146 sec mV mV mV mV Time constant FAST mode Time constant Normal mode Output resistance AMAGC1TCpin Output resistance AMAGC1TCpin 4.8 150 k k
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Table 4. (continued)
Symbol Voffset4 Voffset5 Voffset6 Voffset7 Voffset8 Voffset9 Voffset10 Voffset11 Voffset12 Voffset13 Voffset14 Voffset15 Vdesens1 Vdesens2 Vdesens3 Vdesens4 Parameter Rectifier offset4 Rectifier offset5 Rectifier offset6 Rectifier offset7 Rectifier offset8 Rectifier offset9 Rectifier offset10 Rectifier offset11 Rectifier offset8 Rectifier offset9 Rectifier offset10 Rectifier offset11 Desens threshold1 Desens threshold2 Desens threshold3 Desens threshold4 Test Condition T31<3:0>=0100 T31<3:0>=0101 T31<3:0>=0110 T31<3:0>=0111 T31<3:0>=1000 T31<3:0>=1001 T31<3:0>=1010 T31<3:0>=1011 T31<3:0>=1100 T31<3:0>=1101 T31<3:0>=1110 T31<3:0>=1111 T31<5:4>=00 T31<5:4>=01 T31<5:4>=10 T31<5:4>=11 Min Typ 212 257 312 362 439 485 541 587 653 700 755 800 4.4 2.65 1.8 1.4 Max Unit mV mV mV mV mV mV mV mV mV mV mV mV V V V V
3.3 VCO, PLL AND XTAL OSCILLATOR Table 5.
Symbol VCO Fvcomin Fvcomax Vosc Minimum VCO frequency Maximum VCO frequency Level of oscillation VCC=8.5V VCC=8.5V @200MHz, ( RF=89.3MHz ) VCOB , Impedance of active probe is 0.7pF//1M 155 280 105 MHz MHz dBV Parameter Test Condition Min Typ Max Unit
Loop Filter Output Voltage Vlpoutmin Vlpoutmax Xtal Oscillator Vxtal Oscillation level @XtalD , with 3pF between XtalD and XtalG, Set to 11.25pF 123.5 dBV Minimum LPOUT Maximum LPOUT VCC-0.05 0.05 8.45 V V
FXTALmax FXTALmin FXTALstep
Adjustment range maximum Adjustment range minimum Adjustment range step
+1.95 -1.60 124
kHz kHz Hz
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3.4 STEREODECODER Standard Conditions, unless otherwise indicated: FM: Input at #TUNER_IN = 1 kHz at 450 mVrms, Input Gain setting = 0.5 dB, Deemphasis = 75 s, Roll Off Compensation set to give maximum stereo separation (note that this varies with VSBL setting) AM: Input at #TUNER_IN = 1 kHz at 1 Vrms, Input Gain setting = 0.5 dB Table 6.
Symbol VIN Rin Gain Gmax GSTEP a SVRR Parameter MPX Input Level Input Resistance (TUNERIN) Minimum Input Gain Maximum Input Gain Step Resolution 30 35 Test Condition Input Gain = 3.5dB FM AM Min. 70 Typ. 0.5 100 30 0.5 5.75 1.75 50 55 0.02 91 0.3 Max. 1.25 130 Unit VRMS k k dB dB dB dB dB % dB
Max Channel Separation Supply Voltage Ripple Vripple=100mV, f=1kHz Rejection THD Total Harmonic Distortion fin=1kHz, mono S+N Signal plus Noise to Noise A-weighted, S=2Vrms N Ratio MONO/STEREO SWITCH (With InGain=5.75dB) Pilot Threshold Voltage for Stereo, PTH=1 VPTHST1 VPTHST0 VPTHMO1 VPTHMO0 PLL f/f Capture Range DEEMPHASIS & HIGHCUT Deemphasis Time Constants DeempFM FM; VLEVEL >> VHCH DeempAM Deemphasis Time Constants AM; VLEVEL >> VHCH Pilot Threshold Voltage Pilot Threshold Voltage Pilot Threshold Voltage for Stereo, PTH=0 for Mono, PTH=1 for Mono, PTH=0
80
10 15 7 10 0.5
15 25 12 19
25 35 17 25
mV mV mV mV %
Deemphasis=50s, FM Deemphasis=75s, FM Deemphasis=50s, AM Deemphasis=75s, AM
25 50
50 75 22.3 14.9 5 50 75 62 90 65 75 70 75 95 84
75 100
s s kHz kHz V dB dB dB dB dB dB dB dB dB dB
REF5V Internal Reference Voltage Carrier and Harmonic suppresion at output 19 Pilot Signal 38 Subcarrier 57 Subcarrier 76 Subcarrier Intermodulation 2 fmod=10kHz, fspur=1kHz 3 fmod=13kHz, fspur=1kHz
4.7 f=19kHz, Deemphasis=75s f=38kHz, Deemphasis=75s f=57kHz, Deemphasis=75s f=76kHz, Deemphasis=75s 40
5.3
Traffic Radio 57 Signal f = 57kHz SCA - Subsidiary Communication Authorization 67 Signal f = 67kHz ACI - Adjacent Channel Interference 114 Signal f = 114kHz 190 Signal f = 190kHz
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3.4.1 NOTES TO THE CHARACTERISTICS
3.4.1.1 Intermodulation Suppression
V O ( signal ) ( at1kHz ) 2 = ---------------------------------------------------------------- ; V O ( spurious ) ( at1kHz ) V O ( signal ) ( at1kHz ) 3 = ---------------------------------------------------------------- ; V O ( spurious ) ( at1kHz ) f s = ( 2 10kHz ) - 19kHz
f s = ( 3.13 kHz ) - 38kHz
measured with: 91% pilot signal; fm = 10kHz or 13kHz. 3.4.1.2 Traffic Radio (V.F.) Suppression
V O ( signal ) ( at1kHz ) * 57 ( V WF ) = ----------------------------------------------------------------------------------------- "" V O ( spurious ) ( at1kHz 23kHz )
measured with: 91% stereo signal; 9% pilot signal; fm=1kHz; 5% subcarrier (f=57kHz, fm=23Hz AM, m=60%) 3.4.1.3 SCA ( Subsidiary Communications Authorization )
V O ( signal ) ( at1kHz ) 67 = ---------------------------------------------------------------- ; V O ( spurious ) ( at1kHz ) f s = ( 2.38kHz ) - 67kHz
measured with: 81% mono signal; 9% pilot signal; fm=1kHz; 10%SCA - subcarrier ( fS = 67kHz, unmodulated ). 3.4.1.4 ACI ( Adjacent Channel Interference )
V O ( signal ) ( at1kHz ) 114 = ---------------------------------------------------------------- ; V O ( spurious ) ( at1kHz ) V O ( signal ) ( at1kHz ) 190 = ---------------------------------------------------------------- ; V O ( spurious ) ( at1kHz ) f s = 110kHz - ( 3.38kHz )
f s = 186kHz - ( 5.38kHz )
measured with: 90% mono signal; 9% pilot signal; fm=1kHz; 1% spurious signal ( fS = 110kHz or 186kHz, unmodulated).
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TDA7514
3.5 Noise Blanker Table 7.
Symbol Parameter BLTHL=PEAK+VBE+VPROG Trigger Threshold 1) meas.with VPEAK=0.9V, InGain=5.75dB 111 110 101 VTR 100 011 010 001 000 BLTHH=PEAK+VBE+m*(PEAK-1.5V)+m*0.56V noise controlled Trigger Threshold meas.with VPEAK=1.5V, InGain=5.75dB 00 01 10 11 Rectifier Voltage with InGain=5.75dB VMPX=0mV VMPX=50mV, f=150kHz VMPX=200mV, f=150kHz Deviation dependent Rectifier Voltage with VMPX=500mVrms & InGain=5.75dB 11 10 01 00 Fieldstrength controlled Rectifier Voltage meas.with VMPX=0mV, VLEVEL<< VSBL (fully mono) Suppression Pulse Duration FM Signal HOLDN in Testmode 11 10 01 00 00 01 10 11 Noise rectifier discharge (2) adjustment Signal PEAK in Testmode 00 01 10 11 SRPEAK Noise rectifier (2) charge Signal PEAK in Testmode 0 1 0.5 1.5 2 260 220 180 140 0.9 1.7 2.5 0.9(off) 1.1 1.8 2.6 0.9(off) 1.1 1.5 2.8 38 25.5 32 22 inf. 56 33 18 10 20 1.3 2.1 2.9 mVOP mVOP mVOP mVOP V V V VOP VOP VOP VOP V V V V s s s s W M M M mV/s mV/s 30 35 40 45 50 55 60 65 mVOP mVOP mVOP mVOP mVOP mVOP mVOP mVOP Test Condition Min. Typ. Max. Unit
VTRNOISE
VRECT
VRECTDEV
VRECTFS
TSFM
VRECTADJ
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Table 7. (continued)
Symbol Parameter Noise rectifier adjustment through Multipath (2) Signal PEAK in Testmode 00 01 10 11 AM Noise Blanker TD fc AM delay time Corner frequency of AM delay filter AM configuration AM config New mode (fixed threshold), STDInGain must be 0.5dB AM Noise Detector High Pass Frequency fcHP AM Noise Detector High Pass Filter Order 0 1 0 1 Suppression Pulse Duration AM Signal HOLDN in Testmode 00 01 10 11
Notes:
Test Condition
Min.
Typ. 0.3 0.5 0.7 0.9
Max.
Unit V/ms V/ms V/ms V/ms
VADJMP
128 4 Old mode (signal dependant threshold) Noise dependent threshold 140 10 20 1st order 2nd order 1.2 800 1.0 640
s kHz
% kHz kHz
ms s ms s
TSAM
1. All thresholds are measured using a pulse with TR = 2 s, THIGH= 2 s and TF = 10 s. The repetition rate must not increase the PEAK voltage. 2. By design/characterization functionally guaranteed through dedicated test mode structure
Table 8. Quality Actuators
Symbol Stereo Blend VsbST VSBL d Vsb control voltage for full stereo VSBL = 2V + ("d" factor) * 3V VSB Control Voltage for Full Mono d factor see below 000 001 010 011 100 101 110 111 29 33 38 42 46 50 54 58 % % % % % % % % 5 V Parameter Test Condition Min. Typ. Max. Unit
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Table 8. Quality Actuators (continued)
Symbol Parameter Blend Adjustment High Cut Control VHCH a VHCH = a * b * 4V (level = Smeter * 1.0) VHCH Shift "a" factor see below 0001 0010 0100 1000 b VHCH "b" factor 00 01 10 11 VHCL VHC Control Voltage for FULL Highcut Rolloff 97 73 50 32 67 75 83 92 % % % % % % % % Test Condition Min. Typ. Max. Unit The filtered Smeter input to the SNC detector has variable gain and offset. See SNC Detector specs.
for HCC control from level (where level = Smeter * 1.0): VHCL = a * b * c * 4V (or VHCL = c * VHCH) for HCC control from SNC: VHCL = 2V + a * b * c * 3V
c
VHCL "c" factor
00 01 10 11
16.70 22.20 27.80 33.30 20kHz ~ 4kHz 10kHz ~ 2kHz 4kHz ~ 800Hz 4kHz ~ 800Hz 32
% % % %
fc range
HCC Filter cutoff frequency range
00
01
10
11
HCC step
Number of settings (per range)
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Table 8. Quality Actuators (continued)
Symbol ATTMAX/MIN Parameter Test Condition
2
Min.
Typ.
Max.
Unit
The maximum high cut attenuation can be selected via I C [addr 8C, subaddr 23d, bits D2 to D1]. NOTES: - The maximum high cut frequency setting can make the maximum attenuation lower than this. But then you effectively have a fixed rolloff filter, because the max high cut frequency will keep the hcc filter frequency from moving any higher, and the max high cut attenuation will keep the hcc filter frequency from moving any lower. - Also, there is an alternative way of setting the maximum high cut attenuation, but only if a maximum high cut frequency does not need to be selected. The FAST3 can be set to limit the minimum high cut frequency [addr 8C, subaddr 25d, bit D6], then any of the 32 high cut frequencies can be selected to limit the max attenuation. Max/Min high Cut Attenuation(at 10kHz)@ HCC range 20kHz~4kHz 00 01 10 11 Max/Min high Cut Attenuation(at 10kHz)@ HCC range 10kHz~2kHz 00 01 10 11 Fixed Rolloff -1.8 -4.4 -6.2 -7.0 -5.6 -9.3 -11.5 -12.4 dB dB dB dB dB dB dB dB
There are two ways to set the HCC filter to a fixed filter (there will be no dynamic movement of the filter). Both of these will set the filter to the corner frequency selected in the Max/Min High Cut Frequency [addr 8C, subaddr 25d, bits D4 to D0]. 1) Set the FAST3 to Fixed High Cut ON [addr 8C, subaddr 25d, bit D7]. 2) Turn High Cut OFF [addr 8C, subadress 23, bit D0] and Fix Maximum High Cut Frequency [addr 8C, subaddr 25d, bit D6]
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3.6 AUDIO PROCESSOR (VS = 8.5V; Tamb= 25C; RL= 10k ; all gains = 0dB; f = 1kHz; unless otherwise specified) Table 9.
Symbol INPUT SELECTOR Rin VCL SIN GIN MIN GIN MAX GSTEP VDC Input Resistance Clipping level Input Separation Min. Input Gain Max. Input Gain Step Resolution DC Steps Adjacent Gain Steps GMIN to GMAX Voffset Remaining offset with AutoZero 80 -1 13 0.5 -5 -10 All single ended inputs 70 100 2 100 0 15 1 1 6 0.5 +1 17 1.5 5 10 130 k VRMS dB dB dB dB mV mV mV Parameter Test Condition Min. Typ. Max. Unit
QUASI DIFFERENTIAL STEREO INPUT Rin GQD Symbol CMRR Input Resistance Gain Parameter Common Mode Rejection Ratio Test Condition VCM=1 VRMS@ 1kHz VCM=1 VRMS@ 10kHz eNO Output Noise @ Speaker Outputs 20Hz-20kHz,flat; all stages 0dB Min. 46 46 all inputs to ground 70 100 -4 Typ. 70 60 20 Max. 130 k dB Unit dB dB V
SINGLE-ENDED STEREO INPUT Rin GQD eNO Input Resistance Gain Output Noise @ Speaker Outputs 20Hz-20kHz,flat; all stages 0dB 70 100 0 TBD 130 k dB V
DIFFERENTIAL MONO INPUT Rin GMD CMRR Input Resistance Gain Common Mode Rejection Ratio VCM=1 VRMS@ 1kHz VCM=1 VRMS@ 10kHz eNO Output Noise @ Speaker Outputs 20Hz-20kHz,flat; all stages 0dB 40 40 Differential 40 56 -4 70 60 TBD 72 k dB dB dB V
BEEP CONTROL VRMS fBeep Beep Level Beep Frequency all flat fBeep1 fBeep2 fBeep1 fBeep2 TBD 500 1 2 3 mV Hz kHz kHz kHz
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Table 9. (continued)
LOUDNESS CONTROL Symbol AMAX ASTEP fPeakLPF Parameter Max Attenuation Step Resolution LPF Peak Frequency fP1 fP2 fP3 fPeakLPF HPF Peak Frequency fP1 fP2 fP3 fP4 VOLUME CONTROL GMAX AMAX ASTEP EA Max Gain Max Attenuation Step Resolution Attenuation Set Error G = -20 to +15dB G = -79 to -20dB ET VDC Tracking Error DC Steps Adjacent Attenuation Steps From 0dB to GMIN SOFT MUTE AMUTE TD Mute Attenuation Delay Time T1 T2 T3 T4 VTH Low VTH High Low Threshold for SM Pin High Threshold for SM Pin 2.5 14 0.5 fC1 fC2 fC3 fC4 QBASS Quality Factor Q1 Q2 Q3 54 72 90 117 0.9 1.1 1.3 15 1 60 80 100 130 1 1.25 1.5 16 1.5 66 88 110 143 1.1 1.4 1.7 80 0.48 0.96 20.2 40.4 1 dB ms ms ms ms V V 0.1 0.5 14 -83 0.5 15 -79 1 16 -75 1.5 2 4 2 3 5 dB dB dB dB dB dB mV mV Test Condition Min. -21 0.5 Typ. -19 1 32.5 40 150 4 6 8 10 Max. -17 1.5 Unit dB dB Hz Hz Hz kHz kHz kHz kHz
BASS CONTROL CRANGE ASTEP fc Control Range Step Resolution Center Frequency dB dB Hz Hz Hz Hz
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Table 9. (continued)
Symbol Parameter Q4 DCGAIN Bass-DC-Gain DC = off DC = on (shelving filter) @ gain = 15 dB TREBLE CONTROL CRANGE ASTEP fc Clipping Level Step Resolution Center Frequency fC1 fC2 fC3 fC4 SPEAKER ATTENUATORS Rin GMAX AMAX ASTEP AMUTE EE VDC CHIME INPUT G Gain to speaker outputs -19 dB Input Impedance Max Gain Max Attenuation Step Resolution Mute Attenuation Attenuation Set Error DC Steps Adjacent Attenuation Steps 0.1 35 14 -83 0.5 80 50 15 -79 1 90 2 5 65 16 -75 1.5 k dB dB dB dB dB mV 14 0.5 8 10 12 14 15 1 10 12.5 15 17.5 16 1.5 12 15 18 21 dB dB kHz kHz kHz kHz Test Condition Min. 1.8 -1 Typ. 2 0 10 Max. 2.2 +1 dB dB Unit
AUDIO OUTPUTS VCL ROUT RL CL VAC VDC GENERAL eNO S/N d Sc Output Noise Signal to Noise Ratio Distortion Channel Separation Left/Right BW=20Hz to 20 kHz all gain = 0dB all gain = 0dB flat; Vo=2VRMS VIN=1VRMS; all stages 0dB 80 20 100 0.005 100 0.1 V dB % dB Clipping level Output impedance Output Load Resistance Output Load Capacitor AC gain DC Voltage Level 3.8 4 4.0 4.2 2 10 d = 0.3% 1.8 2 30 100 VRMS W k nF dB V
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4
I2C-BUS INTERFACE
The TDA7514 supports the I2C-Bus protocol. This protocol defines any device that sends data onto the bus as a transmitter, and the receiving device as the receiver. The device that controls the transfer is a master and device being controlled is the slave. The master will always initiate data transfer and provide the clock to transmit or receive operations. The TDA7514 is always a slave. 4.1 Data Transition Data transition on the SDA line must only occur when the clock SCL is LOW. SDA transitions while SCL is HIGH will be interpreted as START or STOP condition. 4.2 Start Condition A start condition is defined by a HIGH to LOW transition of the SDA line while SCL is at a stable HIGH level. This "START" condition must precede any command and initiate a data transfer onto the bus. The device continuously monitors the SDA and SCL lines for a valid START and will not response to any command if this condition has not been met. 4.3 Stop Condition A STOP condition is defined by a LOW to HIGH transition of the SDA while the SCL line is at a stable HIGH level. This condition terminates the communication between the devices and forces the bus interface of the device into the initial condition. 4.4 Acknowledge Indicates a successful data transfer. The transmitter will release the bus after sending 8 bits of data. During the 9th clock cycle the receiver will pull the SDA line to LOW level to indicate it receive the eight bits of data. 4.5 Data Transfer During data transfer the device samples the SDA line on the leading edge of the SCL clock. Therefore, for proper device operation the SDA line must be stable during the SCL LOW to HIGH transition. 4.6 Device Addressing To start the communication between two devices, the bus master must initiate a start instruction sequence, followed by an eight bit word corresponding to the address of the device it is addressing. The TDA7514 addresses are: C4 HEX (Section 1 write), C5 HEX (Section 1 read), 8C HEX (Section 2 write), 8D HEX (section 2 read). The TDA7514 connected to the bus will compare its own hardwired addresses with the slave address being transmitted, after detecting a START condition. After this comparison, the TDA7514 will generate an "acknowledge" on the SDA line and will do either a read or a write operation according to the state of R/W bit. 4.7 Write Operation Following a START condition the master sends a slave address word with the R/W bit set to "0". The device will generate an "acknowledge" after this first transmission and will wait for a second word (the subaddress field). This 8-bit subaddress field provides an access to any of internal registers. Upon receipt of the word address the TDA7514 slave device will respond with an "acknowledge". At this time, all the following words transmitted will be considered as Data. The internal subaddress can be automatically incremented, according to the status of the "Page Mode" bit (Subaddress byte S5).
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4.8 Read Operation If the master sends a slave address word with the R/W bit set to 1, the TDA7514 will transmit one 8-bit data word (see the relevant tables in "Register Organization" section). Figure 3. Frame example
Section 1 CHIP ADDRESS MSB S 1 1 0 0 0 1 0 LSB R/W ACK MSB 0 0 I S4 S3 S2 S1 SUBADDRESS LSB S0 ACK MSB DATA1 to DATAn LSB ACK P
Section2 CHIP ADDRESS MSB S 1 0 0 0 1 1 0 LSB R/W ACK MSB 0 0 I S4 S3 S2 S1 SUBADDRESS LSB S0 ACK MSB DATA1 to DATAn LSB ACK P
S = START P = STOP ACK = Acknowledge I = Page Mode Figure 4. Timing Diagram and Electrical Characteristics
tHIGH tR tLOW tR
SCL
tSU-STA tHD-DAT tHD-STA tSD-DAT tSUBTOP
SDA IN
tAA tDH ttxt
SDA OUT
D95AU378
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TDA7514
Table 10.
Symbol fSCL tAA tout tHD-STA tLOW tHIGH tSU-SDA tHD-DAT tSU-DAT tSU-DAT tR tF ISU-STO tDH VIL VIH Parameter SCL Clock Frequncy SCL Low to SDA Data Valid Time the Bus must be free for the New Transmission Start Condition Host Time Clock Low Period Clock High period Start Conditions Setup Time Data Imput Hold Time Data Input setup Time Data Input Setup Time SDA & SCL Rise Time SDA & SCL Full Time Stop Condition Setup Time Data Out Time Input Low Voltage Input High Voltage 3 4.7 300 1 Test Condition Min Typ 100 300 4.7 4.0 4.7 4.0 4.7 0 4.7 250 250 Max 500 Unit kHz ns s s s s s s s ns s s s ns V V
4.9 Register Organization Table 11. Section 1 (Turner)ADDRESS
MSB D7 1 D6 1 D5 0 D4 0 D3 0 D2 1 D1 0 LSB D0 R/W
Table 12. SUBADDRESS
MSB S7 X S6 X S5 autoincr S4 S3 S2 subaddress S1 LSB S0
Table 13. READ MODE: ISS OUTPUTS)
MSB S7 DEV+ S6 DEV S5 AC S4 FS S3 SSTOP S2 MP S1 BW LSB S0 ON
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TDA7514
Table 14. Address Organization (Tuner Section)
MSB Subaddr.
0 1 2 3 4 5 6 7 FM VCO div Set BP/HPII biquad Set BP/ HPI biquad tSAMPLE counter LSB IFC AM/FM SoftMute to FM deviation counter MSB Set fc II biquad Set fc I biquad
LSB D6
Current select
Function
D7
STBY Lock detenable
D5
D4
D3
D2
D1
D0
Charge Pump Control and STBY
Low current Phase difference threshold counter LSB counter MSB counter LSB counter MSB FM FE slope adiust
High current AM/FM
activation delay
fref VCOadj PLL Lock Detector,FM mode and BYPASS clockenab tests PLL Counter 1 (LSB) PLL Counter 2 (MSB) PLL Reference Counter 2 (LSB) PLL Reference Counter 2 (MSB) FM FE slope adjust AM WAGC starting point, FM VCO divider Quad adjch filter programming, IF Counter Control1 IF Counter Control 2 (central frequency and sampling time) IF Counter Reference (LSB) IF Counter Reference (MSB) and IF Counter Mode Select AM NAGC threshold, AM VCO divider Fast AGC AM fast AGC1, AM NAGC OGFF, on AM UNAGC, WB audio gain Soft Mute, adjacent channel mute Quality Detection: FSmetr offset and gain (SNC), Multipath detector rectifier gain
AM WAGC starting point f
8
FC enable
9 10 11
tCENTER
12
AMVCO div
AM NAGC threshold
13 14
Not used
WB gain
UNAGC threshold FSmeter full mute level FSmeter Offset AdjCh mute thr
NAGC off
AdiCh full mute level
Soft mute thr
15
Qual. MultiPath detector rectifier gain
FSmeter Gain
16
ISSfilter test
Smeter 10ms/1s
Quality AFcheck
Quality fast test
HCC source
Quality Detection: AdjCh detector Qual adjacent gain and offset, HCC source, channel dtctor rect. Quality fast test mode, AF check gain mode: ISS filter test FMIFAMP1 gain FM IFAMP gains, ISScenter frequency, Smeter/ISS test connections Qual AdjCh detector gain, seek mode, Qual AdjCh Rectifier offset, PLL test MUXer, 456KHz VCO adjustment start
17
ISS test connect Set Gain in AdjCh II biquad Manual/ ENIFC
Smet test ISS center frequency connect Enable seek mode manual SET 456 iSS Smeter threshold Smeter test MUXer
FMIFAMP2 gain
18
Quad AdjCh Rectifier offset
VCO adj start
PLL test MUXer
19 20 21 22 23
Manual VCO frequency
manual/ 456KHz VCO adjustment auto (manual mode) FM Smeter stop threshold, ISS Smeter Threshold Smeter test MUXer, SD pin configuration Seek, ISS adjacent channel detector Fm mixer1 adjust, FM AGC
FM Smeter Stop threshold Sd pin configuration ISS AC filter mode FM mix phase adj
SEEK
ISS AC desens slope
ISS AC desens threshold
FM KAGC FM NAGC enable thr MSB
FM mix gain adj
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TDA7514
Table 14. Address Organization (Tuner Section) (continued)
MSB Subaddr.
24 25 26 27 28
LSB D6 D5
Clksep QualityOut MP gain
Function
D7
not used
D4
D3
D2
XTAL adjustment
D1
D0
XTAL adjustment, clock sep Multipath detector, Quality out FMdemod ref frequency divider, FM AGC FM demod fine adjust, FM demod noise blanker Smeter sloder, External WB, testing AM stop station, AM IF 2 Amplifier Gain
QualityOut AC gain FMNAGC threshold LSD not used
ISS MP rectifier gain
ISS/Quality MP filtergain
FMWAGC threshold
FM demod ref frequency divider FM demod fine adjust Smeter Slider
FM demod NB
Test disable EXT WB connect enable AMIF 2AMP gain
29
FM demod input not used AM FAST ARS ISS AGC2 indicator WX narrow Sm &
AM Smeter Stop threshold
30
IFT1 adjust
IFT adjust, AM fast AGC2, ARS, WB narrow Smeter/FC AM IF NB
31
not used
AMIFNB Smeter dis threshold
AMIFNB slow rect offset
Table 15. SUBADDRESS 0: Change Pump Control
MSB D7 D6 D5 D4 D3 0 0 0 0 D2 0 0 0 0 D1 0 0 1 1 LSB D0 0 1 0 1 High current = 0mA High current = 0.5mA High current = 1mA High current = 1.5mA FUNCTION
1 0 0 1 1 0 1 0 1
1
1
1
High current = 7.5mA Low current = 0A Low current = 50A Low current = 100A Low current = 150A Change cump current control
0 1
low current only Automatic current control Turner Stand-by
0 1
Turner StandBy OFF Turner StandBy ON
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TDA7514
Table 16. SUBADDRESS 1: PLL Lock detector, FM mode and test
MSB D7 D6 D5 D4 D3 D2 D1 LSB D0 0 1 0 1 0 1 0 0 1 1 0 0 1 1 0 1 0 1 0 1 0 1 0 1 FUNCTION Charge Pump VCO adjust lock Disable VCO adjust lock Enable fref BYPASS Disable fref BYPASS Enable Turner/pll Am/fm Mode Select AM mode Select FM mode Lock Detector Control PD phase difference threshold 10ns PD phase difference threshold 20ns PD phase difference threshold 30ns PD phase difference threshold 40ns Not valid Activation delay 4x1/fREF Activation delay 6x1/fREF Activation delay 8x1/fREF Lock Detector On/Off Lock detector doesn't control charge pump Lock detector controls charge pump
Table 17. SUBADDRESS 2: PLL Counter 1 (LSB)
MSB D7 0 0 0 1 1 1 1 D6 0 0 0 1 1 1 1 D5 0 0 0 1 1 1 1 D4 0 0 0 1 1 1 1 D3 0 0 0 1 1 1 1 D2 0 0 0 1 1 1 1 D1 0 0 1 0 0 1 1 LSB D0 0 1 0 0 1 0 1 LSB = 0 LSB = 1 LSB = 2 LSB = 252 LSB = 253 LSB = 254 LSB = 255 FUNCTION
Table 18. SUBADDRESS 3: PLL Counter 2 (MSB)
MSB D7 0 0 0 1 1 1 1 D6 0 0 0 1 1 1 1 D5 0 0 0 1 1 1 1 D4 0 0 0 1 1 1 1 D3 0 0 0 1 1 1 1 D2 0 0 0 1 1 1 1 D1 0 0 1 0 0 1 1 LSB D0 0 1 0 0 1 0 1 FUNCTION MSB = 0 MSB = 256 MSB = 512 MSB = 64768 MSB = 65024 MSB = 65280 MSB = 65536
Note: 1 Swallow mode:fVCO/fSYN = LSB + MSB + 32
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TDA7514
Table 19. SUBADDRESS 4: PLL Reference Counter 1 (LSB)
MSB D7 0 0 0 1 1 1 1 D6 0 0 0 1 1 1 1 D5 0 0 0 1 1 1 1 D4 0 0 0 1 1 1 1 D3 0 0 0 1 1 1 1 D2 0 0 0 1 1 1 1 D1 0 0 1 0 0 1 1 LSB D0 0 1 0 0 1 0 1 LSB = 0 LSB = 1 LSB = 2 LSB = 252 LSB = 253 LSB = 254 LSB = 255 FUNCTION
Table 20. SUBADDRESS 5: PLL Reference Counter 2 (MSB)
MSB D7 0 0 0 1 1 1 1 D6 0 0 0 1 1 1 1 D5 0 0 0 1 1 1 1 D4 0 0 0 1 1 1 1 D3 0 0 0 1 1 1 1 D2 0 0 0 1 1 1 1 D1 0 0 1 0 0 1 1 LSB D0 0 1 0 0 1 0 1 MSB = 0 MSB = 256 MSB = 512 MSB = 64768 MSB = 65024 MSB = 65280 MSB = 65536 FUNCTION
Note: 1 fVCO/fSYN = LSB + MSB + 1
Table 21. SUBADDRESS 6: FM FE Adjustment Slope
MSB D7 0 0 1 D6 0 0 1 D5 0 0 1 D4 0 0 1 D3 0 0 1 D2 0 0 1 D1 0 0 1 LSB D0 0 1 1 = 0 (-100%) =1 = 255 (+99%) FUNCTION
Adjusted voltage: without diode connected: Vout = ( /128) Vt
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TDA7514
Table 22. SUBADDRESS 7: AM WAGC Starting point, FM VCO divider
MSB D7 D6 D5 D4 D3 D2 D1 LSB D0 AM Wide AGC Threshold @AMMIX1in 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 1 1 0 1 0 1 0 1 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 1 0 0 1 0 1 all off divide by 2 divide by 3 divide by 3 phase (I) = -90 high side conversion phase (I) = +90 low side conversion 88.0 90.7 92.7 94.4 95.5 96.6 97.6 98.4 99.2 99.9 100.6 101.2 101.7 102.2 102.7 103.1 103.6 104.0 104.4 104.8 105.1 105.5 105.8 106.1 106.4 106.7 106.9 107.2 107.5 107.7 107.9 108.1 @SG 88.0 90.7 92.7 94.4 95.5 96.6 97.6 98.4 99.2 99.9 100.6 101.2 101.7 102.2 102.7 103.1 103.6 104.0 104.4 104.8 105.1 105.5 105.8 106.1 106.4 106.7 106.9 107.2 107.5 107.7 107.9 108.1 FUNCTION
FM VCO divider control
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TDA7514
Table 23. SUBADDRESS 8 : IF Counter Control 1 and AM S.S. Threshold
MSB D7 D6 D5 D4 D3 D2 0 0 0 0 1 1 1 1 0 1 0 1 0 1 0 1 0 1 D1 0 0 1 1 0 0 1 1 LSB D0 0 1 0 1 0 1 0 1 FUNCTION IF Counter frequency window Not valid Not valid Not valid f = 6.25kHz (FM) 1kHz (AM UPC) f = 12.5kHz (FM) 2kHz (AM UPC) f = 25kHz (FM) 4kHz (AM UPC) f = 50kHz (FM) 8kHz (AM UPC) f = 100kHz (FM) 16kHz (AM UPC) IF counter on/off IF counter disable/stand by IF counter enable Adjacent Channel programming Filter 1Fc = 80kHz Filter 1Fc = 100kHz Filter 2Fc = 110kHz Filter 2Fc = 140kHz Filter 1HP Filter 1BP Filter 2HP Filter 2BP
Table 24. SUBADDRESS 9: If Counter Control 2
MSB D7 D6 D5 D4 0 0 0 0 0 0 0 0 1 1 1 D3 0 0 1 1 1 1 1 1 0 0 1 D2 0 0 0 0 1 1 1 1 0 0 1 D1 0 0 1 1 0 0 1 1 0 0 1 LSB D0 0 1 0 1 0 1 0 1 0 1 1 FUNCTION FM antenna adj (proportional to Vtuning) fcenter = 10.60625MHz (FM) 449KHz (AM) fcenter = 10.61250MHz (FM) 449KHz (AM) fcenter = 10.66875MHz (FM) 458KHz (AM) fcenter = 10.67500MHz (FM) 459KHz (AM) fcenter = 10.68125MHz (FM) 460KHz (AM) fcenter = 10.68750MHz (FM) 461KHz (AM) fcenter = 10.69375MHz (FM) 462KHz (AM) fcenter = 10.70000MHz (FM) 463KHz (AM) fcenter = 10.70625MHz (FM) 464KHz (AM) fcenter = 10.71250MHz (FM) 465KHz (AM) fcenter = 10.80000MHz (FM) 479KHz (AM) IF counter time windiw tsample = 20.48ms (FM) 128ms (AM) tsample = 10.24ms (FM) 64ms (AM) tsample = 5.12ms (FM) 32ms (AM) tsample = 2.568ms (FM) 16ms (AM) tsample = 1.28ms (FM) 8ms (AM) tsample = 640s (FM) 4ms (AM) tsample = 320s (FM) 2ms (AM) tsample = 160s (FM) 1ms (AM)
-
-
-
-
-
-
0 0 0 0 1 1 1 1
0 0 1 1 0 0 1 1
0 1 0 1 0 1 0 1
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Table 25. SUBADDRESS 10: IF Counter Reference (LSB)
MSB D7 0 0 0 1 1 1 1 D6 0 0 0 1 1 1 1 D5 0 0 0 1 1 1 1 D4 0 0 0 1 1 1 1 D3 0 0 0 1 1 1 1 D2 0 0 0 1 1 1 1 D1 0 0 1 0 0 1 1 LSB D0 0 1 0 0 1 0 1 LSB = 0 LSB = 1 LSB = 2 LSB = 252 LSB = 253 LSB = 254 LSB = 255 FUNCTION
Table 26. SUBADDRESS 11: IF Counter Reference (MSB) and IF Counter Mode Select
MSB D7 D6 D5 0 0 0 1 1 1 D4 0 0 0 1 1 1 D3 0 0 0 1 1 1 D2 0 0 0 1 1 1 D1 0 0 1 0 1 1 LSB D0 0 1 0 1 0 1 MSB = 0 MSB = 256 MSB = 512 MSB = 15616 MSB = 15872 MSB = 16128 IF Counter Mode 0 0 1 0 0 1 0 0 not valid IF counter FM mode (10.7KHz) IF counter AM mode (450KHz) not valid FUNCTION
Note: 1 fOSC/fTIM = LSB + MSB + 1
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Table 27. SUBADDRESS 12: AM NAGC , AM VCO Divider
MSB D7 D6 D5 D4 D3 D2 D1 LSB D0 AM Narow band AGC Threshold @AMMIX2in 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 1 0 0 1 1 0 1 0 1 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 1 0 0 1 0 1 79.9 82.4 84.2 85.7 86.5 87.7 88.6 89.5 90.1 91.0 91.6 92.1 92.6 93.1 93.6 94.0 94.5 94.8 95.2 95.5 96.0 96.2 96.9 97.2 97.5 98.0 98.5 98.8 99.1 99.4 99.7 100.0 50mV 150mV AM VCO divider mode divide by 10 divide by 8 divide by 6 divide by 4 @SG 77.9 80.4 82.2 83.7 84.5 85.7 86.6 87.5 88.1 89.0 89.6 90.1 90.6 91.1 91.6 92.0 92.5 92.8 93.2 93.5 94.0 94.2 94.9 95.2 95.5 96.0 96.5 96.8 97.1 97.4 97.7 98.0 FUNCTION
FM Soft Mute to deviation threshold
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Table 28. SUBADDRESS 13: AM Fast AGC1, AM Ultra NARROW BAND AGC, Weather Band Gain
MSB D7 D6 D5 D4 D3 D2 D1 LSB D0 0 1 0 1 FUNCTION AM fast AGC1 off (R =100 Kohm) on (R = 9 Kohm) AM Narrow AGC disable NAGC on NAGC off AM Ultra Narrow Band AGC Threshold @ IF2AMPin @ SG 76 67 86 77 92 83 90 81 75 66 85 76 88 79 78 69 74 65 83 74 90 81 79 70 73 64 82 73 87 78 77 68 Weather Band audio gain boost boost off (std audio gain) boost on (audio gain x 15 = +23.5 dB)
0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 1
0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1
0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1
0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
Table 29. SUBADDRESS 14: Soft Mute, Adjacent Channel Mute
MSB D7 D6 D5 D4 D3 D2 D1 0 0 1 1 0 1 0 1 0 0 1 1 0 1 0 1 0 1 0 1 LSB D0 0 1 0 1 FUNCTION Soft mute start/stop point (FM, AM) (*) VSmeterL=0, VSmeterH=0.6 VSmeterH=0.6 VSmeterL=0.2, VSmeterH=1.4 VSmeterL=0.5, VSmeterH=1.4 VSmeterL=1.0, Adjacent channel mute start/stop point (FM) VAdjChH=4.5 VAdjChL=1, VAdjChH=4.5 VAdjChL=2 Full soft mute level -4dB (step = -2.5dB) -21.5dB Full adjacent channel mute level 0dB -6dB -9dB -12dB
(*) Cfr. byte 20 for dependancy of ISS Smeter threshold on byte 14 programming
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Table 30. SUBADDRESS 15: Quality detection: gain and offset on FSmeter (SNC), multipath detector rectifier gain
MSB D7 D6 D5 D4 D3 0 1 0 1 0 1 0 1 0 1 D2 0 1 D1 0 1 LSB D0 0 1 FUNCTION FSmeter gain (SNC) 0 dB (step = 0.15) 2.25 dB FSmeter offset (SNC) 1.8 V 2.4 V Multipath detector rectifier gain 5 dB (step = 1.2dB) +13.4 dB
Table 31. SUBADDRESS 16: Quality Detection: Adjacent channel detector, HCC source, Quality fast test, Quality AF check, ISS filter test
MSB D7 D6 D5 D4 D3 D2 D1 0 0 1 1 0 1 0 1 LSB D0 0 1 0 1 FUNCTION Qual adjacent channel detector rectifier gain 12 dB 17.3 dB 18.4 dB 20 dB High cut control source SNC FSmeter Quality filters fast test mode Test mode off Test mode on filt Smeter tau = 100 us SNC filt internal 22 pF Quality filters AF check freeze mode AF check off AF check on filt Smeter tau = 100 us 60ms/1s Smeter filt freeze MPath filt for StBlend freeze USN filt for StBlend/AdjChMute freeze Smeter filter time constant 1s 10 ms ISS filter test ISS filter input std filter in connected to Smeter test MUXer ISS filter clock enable clock off (test mode) clock on (std)
0 1
0 1
0 1 0 1
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Table 32. SUBADDRESS 17: FM IF AMP Gain, ISS center frequency, Smeter / ISS test connections
MSB D7 D6 D5 D4 D3 D2 D1 LSB D0 FM IF Amp1 gain 0 0 1 1 0 1 0 1 14 dB 18 dB 21.5 dB not used FM IF Amp2 gain (10.7 MHz) [byte<28>bit<6>=0] 0 0 1 1 0 1 0 1 (7 dB) not used 9 dB 11 dB 15 dB FM IF Amp2 gain (450 kHz) [byte<28>bit<6>=1] 0 0 1 1 0 1 0 1 7 dB 7 dB 9 dB not used ISS filter center frequency 0 1 0 1 0 0 1 1 430 kHz 440 kHz 450 kHz 460 kHz Unfiltered Smeter test connection 0 1 std unfilt Smeter users connected to #ACinL unfilt Smeter source disconnected form users ISS test MUXer connection 0 1 std ISS test MUXer (TMODE1) connected to #SMETERTC Smeter filt (60ms/1s) R disconnected from #SMETERTC FUNCTION
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Table 33. SUBADDRESS 18: PLL Test, 456KHz VCO Adjust Start, ISS MP Gain and SD OUT MODE
MSB D7 D6 D5 D4 D3 D2 D1 LSB D0 PLL TEST "testdout1" (pin #LFHC) 0 0 0 0 1 1 1 1 0 0 1 1 0 0 1 1 0 1 0 1 0 1 0 1 no test fref [ref freq divid out] fsyn [VCO freq div out] phi [VCO prescal out] psm [prescal reset] phi fsyn sstop (cntres), fsyn output, 3V output, 3V output, 3V output, 3V input, 3/5V input, 3/5V input, 3/5V FUNCTION
PLL TEST "sstop" (pin #SD) (byte<21>bit<10>=01 0 0 0 0 1 1 1 1 0 0 1 1 0 0 1 1 0 1 0 1 0 1 0 1 no test ifref zeroone stim ifcout fsyn ltst (lock det test) inlock output, 3V output, 3V output, 3V output, 3V output, 3V output, 3V output, 3V output, 3V
456 kHz self-adjustment state machine 0 0 1 if byte<19>bit<0>=0 and byte<1>bit<0>=0 Waiting START Adjacent Channel detector rectifier offset 0 0 1 1 0 1 0 1 0.39 V 0.78 V 1.14 V 1.49 V Quality Seek Mode 0 1 fs Enable seek mode AdjCh detector filter gain 0 1 Filter 2 Gain = 8.5 dB Filter 2 Gain = 14.5 dB
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Table 34. SUBADDRESS 19: 456KHz VCO Adjustment (manual mode)
MSB D7 0 1 0 1 0 1 1 0 0 1 0 0 1 0 1 1 0 0 1 0 1 1 0 0 1 0 1 1 0 0 0 1 1 1 VCO 456KHz frequency adjust mode 0 1 Manual adjustment procedure (I2CBUS) Automatic adjustment procedure (State Machine) maxfreq VCO 456KHz frequency adjust (I2CBUS) Enable 456KHz VCO adj procedure (I2CBUS) D6 D5 D4 D3 D2 D1 LSB D0 Enable IFC (I2CBUS) OFF ON OFF ON minfreq FUNCTION
Table 35. SUBADDRESS 20 : FM Smeter stop threshold, ISS Smeter threshold.
MSB D7 D6 D5 D4 D3 0 1 0 0 1 1 0 1 0 1 0 1 0 1 0 1 0 1 D2 0 1 D1 0 1 LSB D0 FM Smeter Stop Station threshold 0 1 400 mV step 200 mV 3400 mV FM ISS Smeter threshold ( from Softmute thresh. (*)). 0 mV step 67 mV 467 mV 0 mV -467 mV FUNCTION
(*) Threshold is programmed by byte 14 bits<1:0> according to the following table:
Table 36. SUBADDRESS 14: Soft Mute
MSB D7 D6 D5 D4 D3 D2 D1 LSB D0 Soft mute threshold 0 0 1 1 0 1 0 1 0.3V 0.4V 1.6V 1.8V FUNCTION
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Table 37. SUBADDRESS 21 : SD pin configuration, Smeter test MUXer
MSB D7 D6 D5 D4 D3 D2 D1 0 0 1 1 LSB D0 SD pin configuration 0 1 0 1 IFC AND FS Stop Station (output) IFC (output) FS Stop Station (output) test (tristate) pin #SD used as: output from ISS AC det output from ISS MP detinput to ISS AC driver input to ISS MP driver FUNCTION
SMETER TEST MUXER 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 test off AM AGC1W OFFSET AMAGC1N OFFSET AM AGC1UN OFFSET FM MULTIPATH PEAK FM SD THR AM IF2AMP OUT AM SD THR FM W/KAGC OUT not used FM DEMODADJ OUT FM DEMODADJMUTE OUT INLOCK FM SMETERISSON THR FM SMETERISSON BIT FM ISSFILTER INPUT (OUT) [if byte<16>bit<6>=1] 456KVCOADJ SET456 BIT 456KVCOADJ ENIFC BIT 456KVCOADJ CHECK BIT 456KVCOADJ Q21 BIT FM SMETERUNFILTERED QUAL SMETERX1 QUAL SMETER1ms QUAL USN STD NOISE FM ADJCHMUTE REF FM SOFMUTE REF AM IFNBSMETERtoSD COMMAND [must put SD in tristate] AM IFNB FASTRECT OUT AM IFNB SLOWRECT OUT AM IFNB BLANK PULSE AM IFNB SMETDESENS THR FM NAGC OUT
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Table 38. SUBADDRESS 22: Seek, ISS Adjacent Channel Detector
MSB D7 D6 D5 D4 D3 D2 D1 LSB D0 FUNCTION ISS adjacent channel detect. filter shape Filt1 Filt2 Fo Q HP HP 130 2.3 BP HP 100 7.7 BP BP 177 2.0 BP BP 100 8.4 ISS adjacent channel detect. filter gain 23 dB 29 dB ISS adjacent channel detect. filter desens threshold at weak field strength 0.25 V 0.8 V 1.3 V 1.8 V ISS adjacent channel detect. filter desens slope at weak field strength min max Seek FM AM AGC2 tau Seek OFF Seek ON ISS disable short
0 0 1 1 0 1
0 1 0 1
0 0 1 1
0 1 0 1
0 0 1 1 0 1
0 1 0 1
Table 39. SUBADDRESS 23: FM mixer1 adjust, FM AGC
MSB D7 D6 D5 D4 D3 0 0 0 0 1 1 1 0 0 1 1 x 0 1 0 1 0 1 D2 0 0 0 1 0 0 1 D1 0 0 1 1 0 0 1 LSB D0 0 1 0 1 0 1 1 -7 -6 -5 0 +1 +2 +8 FM mixer1 gain adjust. 0% -1% 1% 0% FM NAGC threshold MSB (LSB in byte 26) FM AGC topology NAGC on, KAGC off NAGC off, KAGC on FUNCTION FM mixer1 phase adjust.
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Table 40. SUBADDRESS 24: XTAL adjustment, clock sep
MSB D7 D6 D5 D4 D3 D2 D1 LSB D0 XTAL ajustment capacitors from XTALG to gnd from XTALD to gnd 0 0 0 0 0 1 1 0 0 0 0 1 0 1 0 0 0 1 0 0 1 0 0 1 0 0 0 1 0 1 0 0 0 0 1 XTAL test 0 1 std xtal clock clocksep (test on) 0 pF 1.25 pF 2.5 pF 5 pF 10 pF 20 pF 38.75 pF 0 pF 1.25 pF 2.5 pF 5 pF 10 pF 20 pF 38.75 pF FUNCTION
Table 41. SUBADDRESS 25 : Multipath DETECTOR, QUALITY OUT
MSB D7 D6 D5 D4 D3 D2 D1 LSB D0 ISS/quality MPath det. filter gain 0 0 1 1 0 1 0 1 -7.2 dB 4.3 dB 6.5 dB 10.4 dB ISS MPath det. rectifier gain 0 1 0 1 0 0 1 1 6 dB 12 dB 18 dB 21.5 dB Quality out MPath gain 0 0 1 1 0 1 0 1 off -4 dB 0 dB +4 dB Quality out AdjChann gain 0 0 1 1 0 1 0 1 off -4 dB 0 dB +4 dB FUNCTION
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Table 42. SUBADDRESS 26: FM Demod Ref Frequency Test, FM AGC
MSB D7 D6 D5 D4 D3 D2 0 0 0 0 1 1 1 1 0 0 1 0 1 0 1 0 0 0 1 0 1 1 0 0 1 D1 0 0 1 1 0 0 1 1 LSB D0 FM demod ref frequency divider 0 1 0 1 0 1 0 1 640.6 kHz 602.9 kHz 569.4 kHz 539.5 kHz 512.5 kHz 488.1 kHz 465.9 kHz (std) 445.7 kHz FM WAGC starting point mininum s.p. std maximum s.p. FM NAGC starting point LSB (MSB is bit 6 byte 23) minimum s.p. (with MSB = 0) std (with MSB = 0) (with MSB = 1) maximum s.p. (with MSB = 1) FUNCTION
Table 43. SUBADDRESS 27: FM Demodulator Fine Adjust , FM Demodulator Noise Blanker
MSB D7 D6 D5 D4 0 0 0 1 1 1 1 0 0 1 1 0 1 0 1 D3 0 0 1 0 0 1 D2 0 0 1 0 0 1 D1 0 0 1 0 0 1 LSB D0 FM audio demodulator current adjust 0 1 1 0 1 1 +0 uA +0.167 A +2.51 A -0 A -0.167 A -2.51 A FM Demodulator Noise Blanker NB off setting 1 setting 2 setting 3 FUNCTION
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Table 44. SUBADDRESS 28 : Smeter slider, External WB, testing
MSB D7 D6 D5 0 0 0 1 1 1 0 1 D4 0 0 1 0 0 1 D3 0 0 1 0 0 1 D2 0 0 1 0 0 1 D1 0 0 1 0 0 1 LSB D0 0 1 1 0 1 1 FUNCTION Smeter slider FM AM 0 mV 0 mV +46 mV +39 mV +1420 mV +1215 mV 0 mV 0 mV -46 mV -39 mV -1420 mV -1215 mV External WB filter on std FM (no ext. WB filter) external WB filter enabled; must also program ISS on APSDlatch 23 bit 1 = 1 FM demod Vout test std test; disconnect FM demod Vout from users
0 1
Table 45. SUBADDRESS 29: AM stop station, AM IF 2 Amplifier Gain
MSB D7 D6 D5 D4 D3 0 0 0 1 D2 0 0 0 1 D1 0 0 1 1 LSB D0 AM Stop Station threshold 0 1 0 1 2550 mV AM IF AMP Gain (AM mode) [dB] 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 Not used (31.1) 67.6 70.6 74.7 72.2 75.6 76.9 78.8 75.3 77.7 78.7 80.2 79.3 80.7 81.3 82.3 FM demodulator input connection (bit 5) 450 kHz limiter stereo dec. 456 kHz VCO (test) 450 kHz limiter stereo dec. 456 kHz VCO (test) ... ... ... ... ... ... ... ... ... ... ... ... 300 mV 450 mV 600 mV FUNCTION
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Table 46. SUBADDRESS 30: IFT Adjust, AM Fast AGC2, ARS, WB Narrow Smeter/IFC
MSB D7 D6 D5 D4 D3 0 0 0 1 D2 0 0 1 1 D1 0 0 1 1 LSB D0 0 1 1 1 WX narrow SM&IFC 0 1 0 1 0 1 off on ARS - ISS indicator off on AM fast AGC2 enable off on -> (if Vaudio-Vref > 1.5 V then fast on) IFT1 Adjust 0 pF 0.55 pF 7.7 pF 8.25 pF FUNCTION
Table 47. SUBADDRESS 31 : AM IF NB
MSB D7 D6 D5 D4 D3 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 1 1 0 1 0 1 D2 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 D1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 LSB D0 AM IF NB threshold 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 mV 46 mV 100 mV 146 mV 212 mV 257 mV 312 mV 362 mV 439 mV 485 mV 541 mV 587 mV 653 mV 700 mV 755 mV 800 mV AM IF NB disable threshold 4.4 V 2.2 V 0.5 V OFF FUNCTION
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4.10 Section 2 (Stereodecoder, Audioprocessor + Tuner)Section 1 (Turner) Table 48. ADDRESS
MSB D7 1 D6 0 D5 0 D4 0 D3 1 D2 1 D1 0 LSB D0 R/W
Table 49. SUBADDRESS
MSB S7 testcon S6 azhold S5 autoincr S4 S3 S2 subaddress S1 LSB S0
4.11 READ MODE: ISS OUTPUT
MSB S7 S6 S5 S4 S3 S2 S1 STEREO LSB S0 SMON
SMETER ADC
Table 50. AUDIO PROCESSOR / STEREO DECODER - RELATED BYTES
MSB Subaddr.
0 1 2 3 4 5 6 7 8 9
LSB D6 D5 D4 D3 D2 D1
source selector volume steps loudness gain pass corner frequency treble center frequency bass quality factor loudness steps treble steps bass steps Speaker steps Speaker steps Speaker steps Speaker steps bass DC cut bass center frequency loudness freq. resp. AZ on NB peak charge cur mute (*) soft mute time loudness low pass corner frequency mute (*)
Function
D7
loudness gain correctionl soft step soft step speaker coupling soft step soft step soft step soft step soft step rear seat audio on
D0
Source selector, Volume loudness Treble Bass Speaker Left Front Speaker LRight Front Speaker Left Rear Speaker Right Rear Configuration Audio Processor 1
input gain
10
rear seat audio selector
soft step time
loudness Configuration Audio Processor II treble boost mute (*) Configuration Audio Processor III
11
beep frequency de-emph time constant MP infl. on NB enable pilot threshold
chime dis RR force mono NB AM HPF corner LR NB AM fix threshold RF LF
12
Std In Gain
mute (*) Stereo decoder II, NB II Stereo decoder III, NB IV
13
NB dis. NB AM from MP HPF order (test)
roll-off compensation
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Table 50. AUDIO PROCESSOR / STEREO DECODER - RELATED BYTES
MSB Subaddr.
14 15 16
LSB D6 D5
NB on
Function
NB III Stereo decoder III, NB IV
D7
NB time Strong MP infl. on NB enable AM/FM for STD HC fixed AP test on
D4
D3
D2
D1
NB low threshold
D0
NB overdev-contr thr.
NB noise-contr. thr.
MP infl. on NB VHCL HC from SNC/lev AM 7.2kHz LPF Std test muxer VHCH NB level-contr. thr.
VHCH shift max HC NB Smeter thresholds HC corner freq.
HCenable Stereo decoder IV, NB V STD in switch AM/FM mode selection, Stereo decoder V, NB VI Stereo decoder VI
17
ADC on HC min/max VCO on
18 19
ext. clock Std teston APSD test
TUNER-RELATED BYTES
20 "ac+" - "ac" thresholds difference ISS MP defeat AC not used not used not used "ac" threshold not used ISS 20KHz on ISS: Adjacent Channel detector ISS MP ISS: Multipath detector ctrl on
21 22 23 24 25 26 27 28
not used
ISS MP threshold "dev" threshold
not used
dev+/dev thresholds ratio not used
peak detector discharge current ISS: Deviation detector ISS 80/120 ISS ON ISS enable ISS Filter ISS test ISS filter control matrix ISS filter control matrix ISS filter control matrix VSBL generation, HC range
ISS time constant
MP/AC test switch ISS filter control matrix ISS filter control matrix not used not used not used not used not used not used HC range
ISS test multiplexing
ISS filter control matrix VSBL
Table 51. SUBADDRESS 0: Input selector
MSB D7 D6 D5 D4 D3 D2 0 0 0 0 1 1 1 1 0 0 1 1 0 1 0 0 1 1 0 0 1 1 0 1 0 1 D1 0 0 1 1 0 0 1 1 LSB D0 0 1 0 1 0 1 0 1 FUNCTION Source Selector Quasi differential input Mono differential input Single ended input Turner Turner internal beep mute not allowed Input Gain 0dB 1dB 14dB 15dB Loudness filter gain correction higher gain lower gain
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Table 52. Subaddress 1,4,5,6,7: Volume Spkr atten. LF, RF, LR, RR
MSB D7 D6 0 0 0 0 0 0 0 1 1 1 1 0 1 D5 0 0 0 0 0 1 1 0 0 0 1 D4 0 0 0 1 1 0 1 0 1 1 X D3 1 0 0 0 0 0 0 0 0 1 X D2 1 0 0 0 0 0 0 0 0 1 X D1 1 0 0 0 0 0 0 0 0 1 X LSB D0 Gain/Attenuation 1 1 0 0 1 0 0 0 0 0 X 15dB 1dB 0dB 0dB -1dB -16dB -32dB -48dB -64dB -79dB mute Bass filter DC modeSoft Step On/Off On Off FUNCTION
Table 53. SUBADDRESS 2: Loudness
MSB D7 D6 D5 D4 0 0 0 . 1 1 D3 0 0 0 . 0 0 D2 0 0 0 . 0 1 D1 0 0 1 . 1 0 LSB D0 Attenuation 0 1 0 . 1 0 0 dB -1 dB -2 dB . -19 dB -20 dB all higher values not allowed Loudness High Pass Corner Freq. 0 0 1 1 0 1 0 1 0 1 4 kHz 6 kHz 8 kHz 10 kHz Soft Step On/Off On Off FUNCTION
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Table 54. Subaddress 3: Treble Filter
MSB D7 D6 D5 D4 0 0 0 0 1 1 1 1 0 0 1 1 0 1 0 1 0 1 D3 0 0 1 1 1 1 0 0 D2 0 0 1 1 1 1 0 0 D1 0 0 1 1 1 1 0 0 LSB D0 Gain/Attenuation 0 1 0 1 1 0 1 0 -15dB -14dB -1dB 0dB 0dB 1dB -14dB -15dB Center Frequency 10.0kHz 12.5kHz 15kHz 17.5kHz Speaker Coupling External (AC) Internal (DC) FUNCTION
Table 55. Subaddress 4: Bass Filter
MSB D7 D6 D5 D4 1 1 1 1 0 0 0 0 0 0 1 1 0 1 0 1 0 1 D3 1 1 0 0 0 0 1 1 D2 1 1 0 0 0 0 1 1 D1 1 1 0 0 0 0 1 1 LSB D0 Gain/Attenuation 1 0 1 0 0 1 0 1 -15dB -14dB -1dB 0dB 0dB 1dB -14dB -15dB Quality Factor 1.00 1.25 1.50 2 Bass Soft Step off on FUNCTION
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Table 56. SUBADDRESS 9: Configuration Audio Processor I
MSB D7 D6 D5 D4 D3 D2 D1 LSB D0 0 1 0 0 1 1 0 1 0 0 1 1 0 1 0 1
(*) cfr. APSD MUTE table
FUNCTION AP I2C Soft mute force AP I2C mute (*) allow AP mute from pin (*) Soft Mute Time Mute time = 0.48ms Mute time = 0.96ms Mute time = 20.2 ms Mute time = 40.4 ms STD mute ctrl.from AP mute enabled (*) disabled (*) Bass Center frequency 60 Hz 80 Hz 100 Hz 130 Hz Bass DC cut on off Rear seat audio on off
0 1 0 1
0 1 0 1
Table 57. SUBADDRESS 10: Configuration Audio Processor II
MSB D7 D6 D5 D4 D3 D2 D1 LSB D0 0 1 0 0 1 1 0 0 1 1 0 1 0 0 1 1 0 1 0 1 0 1 0 1 0 1 0 1 FUNCTION Loudness Treble Boost on (advise bit7 byte10 = 1) off (advise bit7 byte10 = 0) Loudness Low Pass Corner Freq. 32.5 Hz 40 Hz 150 Hz Not used (150 Hz) Soft Step Time 280 us 560 us 1.12 ms 2.24 ms Loudness Frequency Response Filter on Filter flat (can be used as an attenuator) Rear Seat Audio Selector quasi differential input single ended input tuner mute
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Table 58. SUBADDRESS 11: Configuration Audio Processor III
MSB D7 D6 D5 D4 D3 D2 D1 LSB D0 0 1 0 1 0 1 0 1 0 1 0 1 FUNCTION APSD mute ctrl. from pin pin influence disabled (*) pin influence enabled (*) Chime mix Left Front on off Chime mix Right Front on off Chime mix Left Rear on off Chime mix Right Rear on off Auto Zero enable off on (0->1 causes AZ sequence to start; 1 enables sequence control from latch<0>) Beep Frequencies 500 Hz 1000 Hz 2000 Hz 3000 Hz
0 0 1 1
0 1 0 1
(*) cfr. APSD MUTE table
Table 59. SUBADDRESS 12: Stereodecoder
MSB D7 D6 D5 D4 D3 D2 D1 LSB D0 0 1 0 0 1 1 0 1 0 1 0 1 0 1 0 1 0 1 FUNCTION STD I2C mute (high-ohmic + PLL hold) force STD I2C mute (*) allow STD mute ctrl. from pin STD In Gain +5.75 dB +4.00 dB +2.25 dB +0.50 dB NB AM old mode (if AM=1) NB AM new mode (if AM=1) Force Mono Mono/Stereo switch automatically Noise Blanker PEAK charge current low high Pilot detector threshold high low Deemphasis time constant FM AM (dep. on source selector) 50 us 14.9 kHz 75 us 22.3 kHz
0 1
(*) cfr. APSD MUTE table
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Subaddress 13: Stereodecoder Noise Blanker
MSB D7 D6 D5 D4 D3 D2 D1 LSB D0 Roll Off Compensation 0 0 0 . 0 . 0 1 1 1 . 1 . 1 0 0 0 . 1 . 1 0 0 0 . 1 . 1 0 0 1 . 0 . 1 0 0 1 . 0 . 1 0 1 0 . 0 . 1 0 1 0 . 0 . 1 Not allowed 7.2% 9.4% . 13.7% . 20.2% Not allowed 19.6% 21.5% . 25.3% . 31% NB AM High pass Frequency 0 1 10 kHz 20 kHz NB AM High pass filter order 0 1 First order Second order Disable Noise Blanker @ MP > 2.5 V (test) 0 1 ON OFF Multipath influence on fixed NB noise detector discharge resistor 0 1 disabled enabled FUNCTION
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Table 60. SUBADDRESS 14: Noise Blanker
MSB D7 D6 D5 D4 D3 D2 0 0 0 0 1 1 1 1 0 0 1 1 0 1 0 0 1 1 0 1 0 1 0 1 0 1 D1 0 0 1 1 0 0 1 1 LSB D0 FUNCTION
Low Threshold (FM)
0 1 0 1 0 1 0 1 320 mV 260 mV 200 mV 140 mV Noise blanker OFF Noise blanker ON Over deviation threshold Over deviation adjust 2.8V Over deviation adjust 2.0V Over deviation adjust 1.2V Over deviation detector OFF 65 mV 60 mV 55 mV 50 mV 45 mV 40 mV 35 mV 30 mV Noise Controlled Threshold
(AM)
166% 156% 147% 137% 128% 118% 109% 99%
Table 61. SUBADDRESS 15: Noiseblanker & High Cut
MSB D7 D6 D5 D4 D3 0 0 0 1 D2 0 0 1 0 D1 0 1 0 0 LSB D0 VHCH Shift ("a" factor) (**) 1 0 0 0 97% 73% 50% 32% Strong multipath-controlled Noise Rectifier Discharge Resistor (if bit7 byte 16 = 1) 0 0 1 1 0 1 0 1 R = infinity R = 56Mohm R = 33Mohm R = 18Mohm Noise Blanker Time FM 0 0 1 1 0 1 0 1 34 us 24 us 29 us 22 us AM 1130 us 755 us 950 us 651 us FUNCTION
(**)cfr. HCC/SB threshold table
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Table 62. SUBADDRESS 16: Noiseblanker
MSB D7 D6 D5 D4 D3 D2 D1 LSB D0 High cut enable 0 1 High Cut OFF (fixed to max corner freq.) High Cut ON Max. High Cut (***) 0 0 1 1 0 1 0 1 max N "4" max N "13" max N "20" max N "31" VHCH ("b" factor) (**) 0 0 1 1 0 1 0 1 67% 75% 83% 92% VHCL ("c" factor) (**) 0 0 1 1 0 1 0 1 20% 25% 30% 35% Strong multipath influence on rectifier discharge current 0 1 disabled enabled FUNCTION
(**) cfr. HCC/SB threshold table (***) lower limit for possible automatic HC filter position; frequency is given by the following formula:
1 fp = -----------------------------------------------------N1 1 1 ----- -------- - --------- --------- + f max 31 f min f max with N given by the software table abovef the minimum HC filter pole frequency depends on the HC range selected (see byte 28 bits <4:3>)
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Table 63. SUBADDRESS 17: High cut, Noise Blanker, ADC, Stdec in Switch
MSB D7 D6 D5 D4 D3 D2 D1 LSB D0 Stereo decoder input switch 0 1 0 0 1 1 0 0 1 1 0 1 0 1 0 1
(**) cfr. HCC/SB threshold table
FUNCTION
switch closed (signal can go into stereo decoder) switch open (signal can not gon into stereo decoder) Minimun and maximun Smeter thresholds for NB 2.2 , 4.3 3.2 , 4.6 2.7 , 4.5 3.7 , 4.7 NB max PEAK value generated from Smeter 1.8 V 1.5 V 1.1 V OFF HCC threshold generation mode (VHCH, VHCL)(**) SNC OFF SNC ON Smeter ADC operation ADC Convert Stop ADC Convert Start AM/FM mode selection for StereoDecoder FM mode AM mode
0 1 0 1
0 1 0 1
Table 64. SUBADDRESS 18: High Cut
MSB D7 D6 D5 D4 0 0 . 1 0 1 0 1 0 1
(***) High Cut LPF corner frequency formula: fhicut = fmax / ( 1 + N / 7.75) with N = 0,1,..,31 and fmax = 4 kHz, 10 kHz or 20 kHz according to byte 28 bit 3 and 4
LSB D3 0 0 . 1 D2 0 0 . 1 D1 0 0 . 1 D0
FUNCTION Max/Min High Cut Frequency (***)
0 1 . 1
20 kHz/ 10 kHz . 4 kHz/ 2 kHz AM 7.2kHz LPF OFF AM 7.2kHz LPF ON High Cut Filter limiting (AM) Fix Maximum High Cut Frequency Fix Minimum High Cut Frequency Fixed High Cut OFF Fixed High Cut ON
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Table 65. SUBADDRESS 19: Stereo Decoder Test Multiplexer
MSB D7 D6 D5 D4 D3 D2 D1 LSB D0 0 1 0 1 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 1 0 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 FUNCTION Stereo Decoder test signals OFF Test signals enabled (if D7 of subaddress is also) "1" External Clock Internal Clock Test signals VHCCH Smeter for ADC Pilot Magnitude VCO control voltage Pilot Threshold HOLDN NB Threshold F228 VHCCL VSBL Level for NB HCC input PEAK SB input REF 5V F228 400kHz VCO OFF ON OFF Audioprocessor test mode OFF Enabled if D7 of subaddress is also "1"
Table 66. SUBADDRESS 20: ISS Weather Band Controls and Adjacent Channel thresholds
MSB D7 D6 D5 D4 D3 D2 D1 LSB D0 0 1 x x 0 0 0 1 0 0 1 1 0 1 0 1 0 0 1 1 0 1 0 1 FUNCTION ISS weather band ISS filter 20KHz (weather band) OFF ISS filter 20KHz (weather band) ON not used not used "ac" threshold ( + Ref3V ) 0.25 V 0.35 V 0.45 V 0.95 V "ac+" - "ac" thresholds difference 0.0 V 0.1 V 0.2 V 0.3 V
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Table 67. SUBADDRESS 21: ISS Multipath
MSB D7 D6 D5 D4 D3 D2 D1 LSB D0 Multipath control 0 1 x x ON OFF not used not used MP threshold 0 0 1 1 x x 0 1 0 1 0 1 0.50 V 0.75 V 1.00 V 1.25 V not used not used MP=1 disables "ac+" detection MP=1 disables "ac" and "ac+" detection FUNCTION
Table 68. SUBADDRESS 22: ISS Deviation Thresholds
MSB D7 D6 D5 D4 D3 D2 D1 LSB D0 peak detector discharge current 0 0 0 0 1 1 1 1 0 0 1 1 0 0 1 1 0 1 0 1 0 1 0 1 6uA 8uA 10uA 12uA 14uA 16uA 18uA 20uA "dev" threshold 0 0 1 1 0 1 0 1 30 kHz 45 kHz 60 kHz 75 kHz dev+ / dev thresholds ratio 0 0 1 1 x 0 1 0 1 1.5 1.4 1.3 1.0 not used FUNCTION
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Table 69. SUBADDRESS 23: ISS Detector
MSB D7 D6 D5 D4 D3 D2 D1 LSB D0 0 1 0 1 0 1 0 0 0 1 1 x x 0 0 1 0 1 0 1 0 0 1 FUNCTION ISS Enable (active low) ON OFF ISS filter ON/OFF manual control OFF ON ISS Filter Bandwidth manual control 120 kHz 80 kHz discharge current;charge current mid; narrow 1uA; 74uA; 124uA 3uA; 72uA; 122uA 5uA; 70uA; 120uA 9uA; 66uA; 116uA 15uA; 60uA; 110uA not used
Table 70. SUBADDRESS 24: ISS Test
MSB D7 D6 D5 D4 D3 D2 D1 LSB D0 FUNCTION ISS test muxer selector (test signal at pin SMETERTC if bit7 byte17 tuner software is 1) MPthreshold ACNthreshold ("ac" threshold) Dwthreshold ("dev" threshold) Dthreshold ("dev+" threshold) ACWthreshold ("ac+" threshold) ac MDSCO ISS out dev+ dev refdev DEMVout output if bit 7 byte 28 tuner = 0 input if bit 7 byte 28 tuner = 1 ISS AC/MP test mode (pin SD) Internal AC signal is connected to QUALIDETECTOR AC input (normal mode) Internal AC signal is output to pin SD (test mode) QUALIDETECTOR AC input is driven by internal AC signal (normal mode) QUALIDETECTOR AC input is driven by pin SD (test mode) Internal MP signal is connected to QUALIDETECTOR MP input (normal mode) Internal MP signal is output to pin SD (test mode) QUALIDETECTOR MP input is driven by internal MP signal (normal mode) QUALIDETECTOR MP input is driven by pin SD (test mode)
0 0 0 0 0 0 0 1 1 1 1 1
0 0 0 1 1 1 1 0 0 0 0 1
0 1 1 0 0 1 1 0 0 1 1 0
1 0 1 0 1 0 1 0 1 0 1 0
0 1 0 1 0 1 0 1
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Table 71. SUBADDRESSES 25-27: ISS Filter Control Matrix
Strong field (Sm = 0) Truth table for ISSon No adjacent channel Weak adjacent channel Strong adjacent channel Truth table for ISS80 No adjacent channel Weak adjacent channel Strong adjacent channel small frequency deviation 0 byte 25 / bit 0 1 small frequency deviation 0 byte 25 / bit 5 byte 25 / bit 7 medium frequency deviation 0 byte 25 / bit 1 byte 25 / bit 3 medium frequency deviation 0 byte 25 / bit 6 byte 26 / bit 0 large frequency deviation 0 byte 25 / bit 2 byte 25 / bit 4 large frequency deviation 0 0 byte 26 / bit 1
Table 72.
Weak field (Sm = 1) Truth table for ISSon No adjacent channel Weak adjacent channel Strong adjacent channel Truth table for ISS80 No adjacent channel Weak adjacent channel Strong adjacent channel small frequency deviation 1 1 1 small frequency deviation byte 26 / bit 6 byte 27 / bit 0 1 medium frequency deviation byte 26 / bit 2 byte 26 / bit 3 1 medium frequency deviation byte 26 / bit 7 byte 27 / bit 1 byte 27 / bit 3 large frequency deviation 0 byte 26 / bit 4 byte 26 / bit 5 large frequency deviation 0 byte 27 / bit 2 byte 27 / bit 4
Table 73. SUBADDRESS 28: VSBL Generation, HC Range
MSB D7 D6 D5 D4 D3 D2 D1 LSB D0 VSBL ("d" factor) (**) 0 0 0 0 1 1 1 1 0 0 1 1 0 0 1 1 0 1 0 1 0 1 0 1 29% 33% 38% 42% 46% 50% 54% 58% High Cut filter range 0 0 1 1 0 1 0 1 20 kHz - 4 kHz 10 kHz - 2 kHz 4 kHz - 800 Hz 4 kHz - 800 Hz FUNCTION
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Table 74. Audio Processor / Stereo Decoder Mute
BYTE 9 BIT 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 BYTE 9 BIT 3 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 BYTE 11 BIT 0 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 BYTE 12 BIT 0 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 pin 55 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 status AP mute mute mute mute mute mute mute mute mute mute mute mute mute mute mute mute play play play play mute play mute play play play play play mute play mute play status STD mute mute mute mute mute mute mute play mute mute play play mute mute mute play mute mute play play mute mute mute play mute mute play play mute mute mute play
byte 12 bit 0 = 0 force I2Cbus STD mute byte 9 bit 0 = 0 force I2Cbus AP mute 11 bit 0 = 1 AP / STD mute depends on pin
HCC control from SNC VHCH = 2V + 3V * a * b VHCL = 2V + 3V * a * b *c HCC control from level (level = Smeter * 0.7) VHCH = ab 4V VHCL = abc 4V SBL VSBL = 2V + d 3V
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5
FUNCTIONAL DESCRIPTION
5.1 FM TUNER SECTION 5.1.1 FRONT END The FM tuner section features an image rejection mixer. Its low noise figure allows connecting the antenna to the mixer without any discrete preamplifier. The external preselection circuit can be realized with one tuned filter only. The filter can be electrically aligned by shifting the filter tuning voltage with respect to the VCO tuning voltage through an 8 bit DAC. The mixer image rejection trimming is obtained by tuning the relative phase offset and relative gain of the I and Q mixer paths. The mixer output (common with the AM 1st mixer output) is connected to a tuned IF transformer, with the possibility of electrically adjusting the center frequency through an internal 4 bit capacitor bank. The FM AGC can operate in two different software-selectable modes: - Keyed Wide band mode: the AGC detects the strength of the wide band RF signal at the input of the 1st mixer to activate the AGC attenuation; the starting point is programmable via software and is varied over a >40 dB range by the very narrow band Smeter signal in order to set a maximum suppression limit that prevents the desired channel from decreasing below an acceptable level; - Wide band + Narrow band mode: the AGC detects the strength of both the wide band RF signal at the input of the 1st mixer and of the narrow band IF signal at the output of the IFT1(both starting points are software-programmable); this mode allows a smooth transition between near adjacent and far adjacent suppression. The AGC features a single current output used to drive the front end P-I-N diode attenuator. 5.1.2 IF FILTERING FM channel selection is mainly done by use of external ceramic filters. Two different software-programmable configurations are available: - normal FM mode: three ceramic filters can be connected using two impedance-matched IF amplifiers (both with programmable gains); the third ceramic filter is connected to the 2nd mixer input; - high-performance Weather Band applications: when an optimum Weather Band channel selection is required, the TDA7514 allows to connect a dedicated narrow band external 450 kHz ceramic filter to implement this function. In this case only two 10.7 MHz ceramic filters can be connected for standard FM selectivity. The 1st ceramic filter is normally connected between the IFT1 output and the 1st IF amplifier input; the 2nd ceramic filter is connected between the 1st IF amplifier input and the 2nd mixer input; the 450 kHz WB filter is connected between the 2nd IF amplifier output and the 2nd IF amplifier input. Both the single standard FM IF amplifier gain and the 450 kHz WB filter driver IF amplifier gain are software programmable. 5.1.3 LIMITING AND DEMODULATION The TDA7514 features a fully integrated FM demodulator which requires a lower IF than 10.7 MHz. Therefore a 2nd mixer is provided to down-convert IF1 down to 450 kHz. The 10.25 MHz frequency needed to drive the 2nd mixer is provided by the XTAL oscillator. Limiting is performed at IF2 through a 5 stage limiter. The demodulator exhibits a very linear frequency-voltage conversion. Precise cancellation of the demodulator output voltage offset is available via software control especially for high audio gain WB applications. Field strength measurement (Smeter) is performed through use of a separate IF1 limiter and logarithmic amplifier. The IF1 limiter output is also used to feed the FM IF counter block.
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VARIABLE-BANDWIDTH SELECTIVITY SYSTEM (ISS) The TDA7514 is equipped with the Intelligent Selectivity System that automatically performs IF bandwidth reduction in presence of strong adjacent channels or weak desired signal. A three position filter is available at IF2; its bandwidth settings are: 120 kHz, 80 kHz and 22 kHz (the latter only for additional on-board WB filtering). The filter is positioned between the 2nd mixer and the IF2 limiter. The filter is switched among its OFF, 120 kHz and 80 kHz positions by a dedicated quality detection circuit. The conditions that are detected in order to drive the filter position are: - adjacent channel presence; - peak frequency deviation magnitude; - field strength. The adjacent channel detection (programmable filter shape and gain, programmable rectifier gain, programmable flag generation thresholds, programmable integrator charge/discharge currents) can be partially or totally disabled, if so programmed, when a strong multipath condition is detected (filter shared with quality circuits with programmable gain, independent rectifier with programmable gain, programmable intervention threshold). The adjacent channel detector is further disabled when the field strength is lower than a programmable threshold (slope programmable as well). The output of the detector are two flags signalling a moderate or a strong adjacent channel presence. The peak frequency deviation is detected by rectifying and peak-detecting the mono part of the MPX signal (programmable integrator charge/discharge currents, programmable thresholds). The deviation detector is desensitized at weak field strength (programmable threshold). The output of the detector are two flags signalling a moderate or high amount of peak deviation. The field strength is measured against a programmable threshold and generates one flag. These five flags are combined to control the ISS bandwidth by access to a 3-D matrix that can be programmed almost completely: it is therefore possible to specify the filter bandwidth for almost all the possible flag combinations. The ISS filter may be disabled by setting the tuner SEEK bit to "1". 5.1.4 SOFT MUTE AND MPX OUTPUT The demodulator output is passed through muting attenuators before becoming available externally for the connection to the stereo decoder. The muting and output buffering are shared with the AM circuit. The FM muting circuit is sensitive to weak field strength and to the presence of adjacent channel. The weak field strength condition (soft mute) is detected by comparing the 1 second-filtered Smeter with a programmable threshold. The soft mute depth and slope are software-programmable. The soft mute is followed by the adjacent channel muting circuit. The presence of adjacent channel is detected as high frequency noise in the MPX signal, so that only the adjacent channel that is not suppressed by the ISS can activate this muting. The filter is described in the Quality section. It is desensitized under weak field strength conditions. The adjacent channel mute threshold/slope and depth are programmable. The output audio amplifier gain can be switched to a +23.5 dB setting in WB in order to equalize the FM and WB 100% modulation audio levels. ISS-dependent automatic roll-off compensation is implemented before the output buffer. 5.1.5 STATION DETECTION The station detection function makes use of signal strength measurement and of IF counting. The result is available on the SD pin as a logic high value when the tuned channel is considered valid. On the SD pin the two field strength-related and IF counter output signals are also available separately by suitably programming the output multiplexer. The field strength-related digital output is derived by comparison of the filtered Smeter (the time constant is 1s in reception and 100us in seek mode - see Quality section) with a programmable threshold. The FM IF counter circuit detects whether the IF signal is centered inside a programmable frequency window around the nominal frequency value. The measuring time window is programmable as well. The result
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is available both on the SD pin and in the tuner I2C bus read byte. 5.1.6 QUALITY The FM quality section of the TDA7514 generates the control signals for all the quality-related functions. These quality signals are: filtered Smeter, adjacent channel content, multipath content. The controlled functions are: AGC keying, soft mute, adjacent channel mute, stereo blend, high cut, audio noise blanker. Externally available quality signals are also generated by this circuit. These signals are: filtered Smeter (analog and digital), adjacent channel content and multipath content. External filtering to generate part of the quality signals uses external capacitors: the voltage values on these capacitors can be kept stored during RDS AF update or fast charged when a new tuned frequency is selected. The Smeter filter uses an external capacitor to generate a low-pass time constant of 1 s in reception mode (10 ms for fast car-radio testing), and an all-internal circuit for a low-pass time constant of 100 us for RDS AF update. The voltage across the capacitor is stored during RDS AF update; it is fast charged following the 100 us-filtered signal during jumps to a new frequency. The 1s/100us Smeter is fed to the station detector, to the high cut filter, to the soft mute and to the A-to-D converter. An internally filtered 1ms-time constant Smeter is further generated to drive the keyed AGC, the ISS and the weak field filter desensitization circuits. The stereo blend function is driven by a combination of weak signal strength-, adjacent channel- and multipath-related information through the SNC (stereo noise control) signal. The SNC signal is a wired-OR of the three conditions and is generated with a peak holder featuring a 400 ms attack time constant and a 10 s decay time constant. The Smeter contribution to the SNC is programmable in terms of gain and offset; the same is true for the two other bad quality indicators (filter shape, rectifier offset and gain are programmable) keeping in mind that the adjacent channel filter and rectifier are shared with the adjacent channel mute circuit and that the multipath filter is shared with the ISS multipath detector. The voltage across the external SNC filtering capacitor is stored during RDS AF update, and is driven by a fast charge circuit during jumps to a new frequency. A fast car-radio test mode is also available in which the external capacitor is disconnected and substituted for by a much smaller internal capacitor. A faster attack of the stereo blend function in case of sudden onset of adjacent channel or multipath conditions is ensured by actually driving the stereo blend circuit by a further wired-OR circuit sensing the SNC voltage as well as the unfiltered multipath and adjacent channel rectifier outputs. The quality signals available to the u-processor are: filtered Smeter (on the dedicated buffered SMETER pin), the multipath information (on pin QUALMPOUT), a programmable combination of multipath and adjacent channel information (on pin QUALACMPOUT), and 6 bit digitized filtered Smeter (via the tuner I2C bus read byte). 5.2 AM TUNER SECTION 5.2.1 FRONT END The AM tuner front end section consists of a high IP3 mixer whose outputs are common with the FM first mixer. After going through the first FM IF1 ceramic filter the signal enters the second mixer for conversion to the second IF of 450 kHz where channel selection takes place. The second mixer exhibits a high IP3 value too, and has a fixed gain. The front end AGC detects mainly a wide band signal (RF signal from the input pins of the first mixer) and a very narrow band signal (Smeter, generated by the signal at the input of the IF2 amplifier after channel selection has occurred). A third fairly narrow band input (IF1 signal from the input pin of the second mixer) is also available, although the first mixer-input-referred IP3 figures of the two mixers make this input generally superfluous. The FE AGC starting points on all three input channels are programmable. The FE AGC circuit drives the external attenuation P-I-N diodes and the external RF amplifier gain control terminal.
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5.2.2 IF NOISE BLANKER An IF noise blanker circuit is present to detect and remove impulse noise especially at weak field strength levels. The noise spikes are detected at the output of the first mixer and noise cancelling takes place in the second mixer. The necessary delay in the signal path is provided by the IF1 ceramic filter. The detection circuit consists of an expressly-built IF1 limiter and Smeter detector (not the same used for FM Smeter generation), followed by a pulse detector. The sensitivity of the noise blanker is programmable. The IF NB is desensitized at high field strength (using the filtered Smeter) and the desensitization threshold can be programmed. 5.2.3 IF AMPLIFIER AND DETECTOR After channel selection by means of the IF2 ceramic filter, the AM signal is amplified by a very high gain (up to 70 dB, programmable) linear amplifier, and demodulated by an integrated quasi-synchronous detector. The phase information for the detector is derived from the IF2 limiter (shared with the FM signal path) whose input is the IF2 amplifier input pin. The same IF2 limiter is used to generate the AM Smeter information since it uses a narrow band signal and is not subjected to AGC. The IF2 amplifier gain is controlled by the AGC2 loop. The IF2 limiter output is also used to generate the input signal for the AM IF counter. 5.2.4 AUDIO OUTPUT The demodulated signal is buffered on the same output pin used for the FM MPX signal and is subjected to the action of the soft mute circuit as well (programmable threshold/slope). The controlling signal for this function is the filtered Smeter. 5.2.5 STATION DETECTION Station detection in AM is done evaluating the field strength and the IF2 signal frequency position. The field strength detector (sensing the filtered Smeter) has a programmable threshold. The programmability of the IF counter is the same as for the FM IF counter, albeit with different center frequency, frequency window and sampling time programming. The SD information or the single weak field strength information or IF counter result are available at the SD pin. The Smeter is available both in analog format (buffered at the SMETER pin) and in a 6 bit digital format (tuner I2C bus read byte). 5.3 TUNING SECTION 5.3.1 VCO AND DIVIDERS One VCO is used for both AM and FM tuning. To implement the world tuning concept (one VCO application for all the geographical areas), the VCO runs at approximately 200 MHz. Digital dividers generate the LO signals suitable for the AM and FM 1st mixers. The VCO itself is a two-pin base-input collector-output bipolar amplifier. A first divider by 1, 2 and 3 is present to generate the FM LO frequency and to be fed to the PLL. A second divider by 4, 6, 8 and 10 is present to generate the AM LO frequency. For FM tuning it is possible to program whether the mixer works in high- or in low-side injection mode. A 90a phase shift circuit operated on the output of the first divider to generate the I and Q portions of the LO for the FM image rejection mixer. 5.3.2 XTAL OSCILLATOR A 10.25 MHz crystal oscillator is used to generate the reference frequency of the tuning PLL and of the switched capacitor circuits of the TDA7514. The oscillation frequency can be finely adjusted by programming internal capacitors (5 bit).
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5.3.3 PLL Tuning is achieved thanks to a high speed PLL for fast RDS operation. The VCO input (after the first divider) is divided through a swallow counter-divider and compared to the divided 10.25 MHz reference frequency (fully programmable divider). In FM the absence of a locked condition can be detected in order to automatically enable the charge pump current and loop filter bandwidth to increase in order to speed up the locking process. Automatic switch back to a lower charge pump current and narrower loop filter bandwidth can also be forced by the lock detector, thus achieving a slower but less noisy operation of the tuning loop. Both the high and the low values of the charge pump current are programmable. Two separate loop filters can be used for optimized AM and FM operation. 5.3.4 STEREO DECODER SECTION The stereo decoder is crossed by both the AM and the FM signal. The AM signal is only low-pass filtered and subjected to audio noise blanking if necessary; the FM MPX signal is stereo demodulated, low-pass filtered and blanked against impulse noise if necessary. 5.4 FM MODE 5.4.1 INPUT STAGE The FM stereo decoder input stage provides a high-input impedance buffering. The input impedance is opened during the RDS AF update phase by software or external pin control (programmable function) in order not to discharge the coupling capacitor placed between the tuner output and the stereo decoder input, and so speed up the return to normal listening. The audio noise blanker circuit is fed from the stereo decoder buffer output: when the input impedance is open during RDS AF update, the noise blanker is still able to work for a short period of time before the capacitance associated with the buffer input stage is discharged. During RDS AF update the output of the buffer is muted to avoid letting transient signals leak through the audio processor section. An additional input series switch has been added to perform the stereo decoder auto zero function (see also Audio Processor section). This switch must be opened before selecting the tuner as the audio source in order to allow the stereo decoder internal filters to discharge before the offset measurement is performed. The input buffer in FM mode is followed by an 80 kHz low-pass filter to remove high frequency noise. 5.4.2 PLL The buffered MPX signal is fed to a 19 kHz-centered band-pass filter and subsequently to a PLL used to regenerate the 38 kHz carrier for stereo demodulation. The PLL compares the pilot tone with the divided output frequency of an internal VCO running at 456 kHz, locking its operating frequency and phase to that of the pilot tone. The PLL status can be stored during the RDS AF update phase in order to speed up subsequent returning to normal listening conditions. Since the VCO tuning range is small, the VCO needs being adjusted to a setting that ensures lock is achieved when a pilot tone is present. On the current TDA7514 version it is necessary to perform this alignment during the car-radio test phase, by injecting a 19 kHz tone into the stereo decoder and changing the VCO programming until a lock condition is reached. The presence of a stereo signal is detected in this block by measuring the peak value of the pilot tone and comparing it with a programmable threshold. The resulting information can be read back via I2C bus (audio processor/stereo decoder I2C read byte). 5.4.3 STEREO DEMODULATOR AND BLEND The MPX signal is fed to the stereo demodulator where the L and R outputs are derived. In case of a stereo transmission in weak field or bad reception conditions (see FM tuner quality section) a gradual transition
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from stereo to mono is performed. The signal strength thresholds for the automatic stereo blend functions can be set by programming the gain of the Smeter contribution to the SNC signal (compared to a fixed threshold sets the full stereo point) and subsequently programming the voltage threshold against which the SNC signal is compared to set the full mono threshold. In case the transmission is stereo, it is possible if so desired to set it to forced mono to improve the received SNR. The TDA7514 stereo demodulator additionally performs the functions of roll-off compensation and pilot cancelling. The amount of the former is programmable. The latter function is activated when an FM MPX signal with pilot tone is detected; the function is disabled in AM and in FM if no pilot tone is detected. 5.4.4 HIGH CUT AND DE-EMPHASIS FILTERS The L and R signals are low-passed filtered by the high cut and, subsequently, by the de-emphasis filter. The high cut filter consists of a fixed resistor and a 5 bit digitally-controlled binary-weighted capacitor (whose value therefore changes between Cmin and Cmin + 32 x Cstep). The digital control is done by converting the filtered Smeter into a 5 bit word. Programming the internal resistor value, three possible corner frequency ranges (800 Hz - 4 kHz, 2 kHz - 10 kHz, 4 kHz - 20 kHz) are available. It is possible to force the actual range to be smaller than one of the above mentioned ones by setting: - the maximum capacitor value (4 position programmable control); - a 5 bit word to be used as limit (32 possible values), in conjunction with a bit that sets whether this limit is to be used as a maximum or as a minimum; - it is additionally possible, if so desired, to keep the high cut filter to a fixed position by sending the position code in the previously mentioned 5 bit register and further setting a dedicated bit; - the high cut filter can also be defeated via a dedicated bit. The controlling signal for this filter is chiefly the filtered Smeter. It is also possible to program the high cut control input selector to use the SNC instead of the Smeter. The contributions to the SNC signal from the Smeter, adjacent channel and multipath detectors is the same as for the stereo blend function. The level "0" of the converted signal (corresponding to the maximum filter corner frequency) is obtained when the control signal is equal to or greater than the programmable threshold VHCCH. The level "31" (corresponding to the minimum filter corner frequency) is obtained when the control signal is equal to or smaller than the programmable threshold VHCCL. Noise blanking is performed at this stage. "Corners" in the waveform due to the holding action of the noise blanking circuit are smoothed by the successive de-emphasis filter. The fixed de-emphasis filter can be programmed to 75 us and 50 us; in AM mode it is shifted to a seven times higher corner frequency. 5.4.5 AM MODE In AM mode the PLL is on though no pilot tone is present; the stereo demodulator is forced to work in the mono configuration and the pilot canceller is off. 5.4.6 INPUT STAGE The only difference between the AM and the FM configuration of the input stage lies in the input impedance only (30 kOhm for AM, 100 kOhm for FM). The functions are identical. 5.4.7 DELAY FILTER The input stage is followed by a fourth order low-pass filter with a cut-off frequency of approximately 4 kHz and a delay of approximately 130 us whose main purpose is to generate the delay in the signal path necessary for audio noise blanking. The filter contributes to the low-pass filtering of the AM signal as well. 5.4.8 HIGH CUT FILTER The high cut filter is AM can be used both statically by programming a fixed corner frequency (the 800 Hz - 4 kHz range has been specifically designed for AM although it is available also in FM) or dynamically, exactly like the FM high cut filter. See the FM high cut filter section for further details.
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The de-emphasis filter is shifted to a seven times higher corner frequency in AM mode with respect to the FM mode. 5.4.9 AUDIO NOISE BLANKER SECTION The operation of the audio noise blanker varies in FM and in AM. 5.4.10 FM MODE The FM noise blanker triggering circuit acts as a peak-to-average detector on the high-passed MPX signal. The input 140 kHz high-pass filter removes the desired audio part so that the impulse noise is more easily detected. The high-pass signal then follows two different paths: - after rectification it is fed to one terminal of the trigger comparator; the impulse noise is present on this path together with high frequency noise; - after rectification it is fed to a slow peak detector which is not able to follow the impulse noise but whose output (PEAK signal) represents the white high frequency noise level; the output of the slow rectifier is the main input of the threshold generation circuit, whose output is applied to the second terminal of the trigger comparator. The threshold generation circuit generates a threshold as a monotonically increasing function of the PEAK signal. The function can be programmed in its linear coefficient and in its second order coefficient. For superior performance in the dynamically changing car-radio environment the activation threshold is further influenced by three other parameters: field strength, FM frequency deviation and multipath presence. The influence of these parameters can be disabled and is programmable. The parameter influence on the noise blanker sensitivity is as follows: - field strength: when the field strength decreases the noise blanker less becomes less sensitive (at low field strength white noise becomes higher and false triggering becomes more likely); - frequency deviation: if the FM frequency deviation is high, the noise blanker becomes less sensitive; this is due to the fact that a large deviation causes a high MPX level which in turn might not be rejected enough by the noise blanker detector input high-pass filter, thus causing false triggering; - multipath: the presence of a strong multipath condition increases the sensitivity of the noise blanker. The triggering comparator output activates a retriggerable monostable circuit whose output drives the "Hold" switch in the high cut filter section. The blanking time is programmable and the whole noise blanker action is defeatable via software. 5.4.11 AM MODE In AM mode the noise blanker detector can operate in two different ways. For both modes the possibility to low-pass the signal entering the noise blanker detector is foreseen (7.2 kHz LP filter software defeatable), in order to be able to reduce the white noise effect on the detector that may lead to false triggering, especially for AM mode 1. 5.4.12 AM MODE 1 This noise blanker operation mode is similar to the FM operation mode. The input audio signal taken before the delay filter (see stereo decoder in AM) can be low-pass filtered (see AM mode description above) and is subsequently high-pass filtered with a filter programmable in terms of corner frequency and order. The resulting signal still contains the impulse noise information, high frequency noise (depending on the activation of the 7.2 kHz filter) and audio (it is not possible to effectively eliminate all the audio content because the AM channel bandwidth - determined by the IF2 ceramic filter - is barely wider than the signal bandwidth, and the spectral differences between the impulse noise and the signal are small). The signal is then applied to the same peak-to-average detector that is used for FM; the difference is that the deviation detector is not influencing the threshold generation in this case. The noise blanking time, programmable also for AM, is about 30 times longer than for FM.
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5.4.13 AM MODE 2 In this operation mode the detector operates in a much more straightforward configuration: the instantaneous AM audio level is compared with a fixed programmable threshold, and the comparison result activates the retriggerable monostable. The advised programmed threshold corresponds to an equivalent 140% AM modulation level. 5.5 AUDIO PROCESSOR SECTION 5.5.1 INPUTS The audio processor input section features a main channel multiplexer, a rear channel multiplexer (RSA, Rear Seat Audio function), an input gain stage and autozero circuit. The main channel multiplexer allows connecting the following sources to the main audio processing path: - 1 quasi-differential source; - 1 stereo differential source; - 1 mono differential source; - tuner output (AM, FM); - beep generator. The RSA selector (see speaker output section) can connect the rear speaker outputs to the following sources bypassing all the tone and volume control: - 1 quasi-differential source; - 1 stereo differential source; - tuner output (AM, FM). The different sources are subjected to the following input attenuations: - quasi-differential source: -4 dB - stereo differential source: 0 dB - mono differential source: -4 dB. The main channel signal path features an input gain stage (0..+15 dB, 1 dB step) to equalize the different source levels and the autozero circuitry that removes the DC offset generated between the input pins and the input gain stage output. The autozero procedure is automatically run every time byte 0 of the audio processor I2C software is addresses, that is every time the main source is changed or the input gain is changed. In case the new source is the stereo decoder the source change must be preceded by opening the stereo decoder input for a time long enough to discharge the stereo decoder internal filters (see stereo decoder input section). The same is true even when the source is switched from AM to FM and vice-versa. The autozero procedure can be manually activated through a dedicated bit, and can be prevented from running by setting a different dedicated bit. The beep generator is considered a main channel source, and it can generate a 500 Hz, 1 kHz, 2 kHz, 3 kHz tone. 5.5.2 SOFT MUTE The input stage is followed by a soft mute stage aimed at automatically and smoothly driving the audio processor from its current state into a full mute condition. The overall transition time is software selectable. It is possible to control the stereo decoder RDS AF update mute circuits (input impedance open switch ("high ohmic mute"), stereo decoder mute and PLL hold) from the audio processor soft mute. 5.5.3 LOUDNESS FILTER The TDA7514 features a loudness function made up by a 20 dB attenuator in 1 dB steps, a second order LP filter with programmable corner frequency and a defeatable high pass filter with programmable corner frequency.
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The attenuator has been realized employing the "soft step" technique that reduces the audible DC click at the speaker outputs by dividing the 1 dB step into several smaller-amplitude, longer duration transitions. 5.5.4 VOLUME CONTROL The volume stage controls the level over a +15 dB..-79 dB + mute range in 1 dB steps. The volume attenuator is also realized with the soft step circuitry. 5.5.5 TREBLE FILTER The treble filter consists of a second order resonating filter with programmable center frequency. The boost/cut range is !15 dB in 1 dB steps. 5.5.6 BASS FILTER The bass filter consists of a second order resonating filter with programmable center frequency and quality factor. It is also possible to set and defeat the DC mode both in cut and in boost. The boost/cut range is !15 dB in 1 dB steps and the attenuator features the soft step circuitry. 5.5.7 SPEAKER ATTENUATORS The speaker attenuator driver circuit allows separate volume control for each of the four outputs. The level is controlled over a +15 dB.. -79 dB + mute range in 1 dB steps with soft step. An output buffer provides DC shift to a typical 4V level and an AC gain of +4 dB. The source of each speaker output circuit can be chose among the following configurations: - tone control output via external AC coupling (coupling shared by front and rear channels); - tone control output via internal DC coupling (coupling shared by front and rear channels); - rear seat audio (only for rear channels). It is furthermore possible to mix an external source (typically the chime source) on all the four outputs, selecting on which outputs the mixing must take place (any combination is allowed). The volume of the mixing source cannot be changed internally.
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Table 75. TQFP80 Mechanical Data & Package Dimensions
mm MIN. A A1 A2 B C D D1 D3 e E E1 E3 L L1 K 0.45 0.05 1.35 0.22 0.09 16.00 14.00 12.35 0.65 16.00 14.00 12.35 0.60 1.00 0.75 0.018 1.40 0.32 TYP. MAX. 1.60 0.15 1.45 0.38 0.20 0.002 0.053 0.009 0.003 0.630 0.551 0.295 0.0256 0.630 0.551 0.486 0.024 0.0393 3.5(min.), 7(max.) 0.030 0.055 0.013 MIN. inch TYP. MAX. 0.063 0.006 0.057 0.015 0.008
DIM.
OUTLINE AND MECHANICAL DATA
TQFP80 (14x14x1.40mm)
D D1 D3
A A2
A1
60 61 41 40
0.10mm .004 Seating Plane
e
E3 B
E1
E
PIN 1 IDENTIFICATION
Gage plane 0.25mm
80 1 20
21
K
TQFP80L
C L L1
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Table 76. Revision History
Date June 2005 Revision 1 First Issue Description of Changes
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Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics. The ST logo is a registered trademark of STMicroelectronics. All other names are the property of their respective owners (c) 2005 STMicroelectronics - All rights reserved STMicroelectronics group of companies Australia - Belgium - Brazil - Canada - China - Czech Republic - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan Malaysia - Malta - Morocco - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States of America www.st.com
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