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CDB44L11 Evaluation Board for the CS44L11
Features
23 mW/Channel into 16 at 2.4 V Variable power supplies from 1.8 V to 2.4 V Digital bass boost and treble boost Programmable digital volume control Short circuit protection >90% amplifier efficiency
As shown below, the CS44L11 takes PCM digital audio input and converts it to a PWM output. This 16-pin TSSOP IC provides volume up/down, treble boost, bass boost and mute functions via push buttons and a micro controller using an IC interface. A RS232 interface is provided for programming the micro controller. The CS8420 is a receiver and sample rate converter. It takes in the S/PDIF at a range of input sample rates and generates a PCM output signal at a fixed sample rate. The low pass filter removes high frequency components from the output PWM signal effectively converting it from digital to analog.
Description
The CDB44L11 is an excellent means to quickly demonstrate the CS44L11 Cirrus Digital Power Headphone Amplifier IC. Analysis requires only a digital signal source and an analog signal analyzer.
ORDERING INFORMATION CDB44L11
I
Demonstration Board
MCLK
Clock Divider LRCK and SCLK Low Pass Filter CS44L11 Low Pass Filter
2
16 Headphones
S/PDIF IN
CS8420
I2S
4
Control Buttons
I2C
8
uC
5
2
LED Indicators
http://www.cirrus.com
Copyright Cirrus Logic, Inc. 2004 (All Rights Reserved)
(c)
APR `04 DS640DB1 1
CDB44L11
TABLE OF CONTENTS
1. CDB44L11 SYSTEM OVERVIEW ............................................................................................ 3 2. SCHEMATIC DESCRIPTIONS ................................................................................................. 3 2.1 CS44L11 Headphone Monitor and Output Filter ................................................................ 3 2.2 Clocking ............................................................................................................................. 4 2.3 CS8420 Sample Rate Converter ....................................................................................... 4 2.4 Microcontroller ................................................................................................................... 4 2.5 Power Supplies and Level-Shifting .................................................................................... 4 3. OPERATION INFORMATION ................................................................................................... 6 3.1 Operating Instructions ........................................................................................................ 6 4. CONTROL FUNCTIONS ........................................................................................................... 7 4.1 Control Buttons .................................................................................................................. 7 4.2 LED Status ......................................................................................................................... 7 4.3 CS44L11 Initialization ........................................................................................................ 9 5. BILL OF MATERIALS ........................................................................................................... 17 6. REVISION HISTORY .............................................................................................................. 20
LIST OF FIGURES
Figure 1. CS44L11 PWM Headphone Amplifier ............................................................................ 10 Figure 2. CS8420 S/PDIF Receiver and Sample Rate Converter................................................. 11 Figure 3. Microcontroller................................................................................................................ 12 Figure 4. Power Supply ................................................................................................................. 13 Figure 5. Assembly Drawing ......................................................................................................... 14 Figure 6. Top Layer ....................................................................................................................... 15 Figure 7. Bottom Layer .................................................................................................................. 16
LIST OF TABLES
Table 1. Volume Status LED Decodes ............................................................................................ 8 Table 2. Treble/Bass Boost Status LED Decodes........................................................................... 8 Table 3. Initial CS44L11 Register Settings...................................................................................... 9 Table 4. Revision History .............................................................................................................. 20
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1. CDB44L11 SYSTEM OVERVIEW
The CDB44L11 is an excellent means of quickly demonstrating the CS44L11. The CS8420 digital audio interface receiver provides an interface to digital audio sources including the majority of digital audio test equipment.
2. SCHEMATIC DESCRIPTIONS 2.1 CS44L11 Headphone Monitor and Output Filter
The CS44L11, shown in Figure 1, can accept sampling frequencies varying from 8 kHz to 96 kHz and can produce a PWM frequency ranging from 8 X Fs to 48 X Fs (refer to CS44L11 datasheet). In this design the 8 X Fs mode is used with a 48.25 kHz sample frequency (Fs), which will result in a 386 kHz PWM switching frequency. As shown in Figure 1, L3, L4, C29, and C30 form the 2nd order low pass LC filter for the output audio. The following equations show how to calculate the filter values: Cfilter = 0.707 / (6.283 * fc *RL) Lfilter = (1.414 * RL) / (6.283 * fc) where: fc = desired -3 dB frequency of the filter RL = the nominal speaker load impedance If you choose fc = 35 kHz, RL= 16 W, then: Cfilter = 0.707 / (6.283 * 35000 * 16) = 0.2009 F Lfilter = (1.414 * 16) / (6.283 * 35000) = 102.881 H Choosing practical component values: Cfilter = 0.22 F Lfilter = 100 H Output distortion is directly related to the inductor quality. The inductors should have a saturation current of at least 150 mA for RL= 16 . This design uses the Central Technologies CTGSR74B 100 H inductors for the output filter. 220 F capacitors are used to block any DC signal from being heard at the output. For maximum output power, low ESR capacitors should be used on the output.
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2.2 Clocking
The provided MCLK oscillator frequency is 12.352 MHz. Any oscillator between 6.4 MHz and 24.576 MHz may be used in the socket. The MCLK signal is divided by the clock divider to produce SCLK (MCKL/4), and LRCK (MCKL/256). Using a 12.352 MHz MCLK, SCLK is 3.088 MHz, and LRCK is 48.25 kHz.
2.3
CS8420 Sample Rate Converter
Refer to Figure 2. The CS8420 is a S/PDIF receiver and sample rate converter. It is configured to accept data at any sample rate between 32 kHz and 96 kHz and transmits data in PCM audio data format based on the MCLK oscillator frequency. The CS8420, while not required, improves system performance by reducing clock jitter and providing one fixed output frequency. In this design, the 48.25 kHz sample rate was chosen so that the CS8420 does not perform 1:1 conversion when receiving 48 kHz input data. Noise can be introduced into the system when a 1:1 conversion is performed and should be avoided for optimal performance. For more information please refer to the CS8420 datasheet.
2.4
Microcontroller
Figure 3 shows the host microcontroller circuitry. There are 8 buttons for control features, 5 LEDs to indicate status, and an I2C interface to the CS8420 and the CS44L11. See Table 3 for the initial CS44L11 register settings. After power is first applied to the board or the reset button is pressed, all settings will revert to the default settings. The board is populated with a Motorola MC68HC908GP32 with the software preprogrammed to run the CDB44L11. The microcontroller code was written in C and compiled with the 'COSMIC C Compiler'. The microcontroller uses the I2C control bus to read and write to the CS44L11 control registers - refer to CS44L11 data sheet for more information.
2.5
Power Supplies and Level-Shifting
Figure 4 shows the power supply and level shifting circuitry. Due to the CS44L11 operating at below +5.0 V, level-shifting circuitry has been included to allow for operation with the microcontroller and the CS8420, both of which must run at +5.0 V. The CS44L11 uses a half bridge output stage and is therefore affected by power supply pumping. Power supply pumping is a phenomenon observed in half-bridge switching amplifiers. It is caused by stored energy in the output inductor that is fed back into the power supply during switching. To compensate for power supply pumping, a resistive load is used to dissipate the
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switching current. In most designs this may be omitted due to other system components loading the supply line and dissipating the current. The resistive load is only used to simulate a circuit load. In the CS44L11, the output MOSFETs directly switch between ground and VA_HP, therefore the performance of the audio output from the amplifier is adversely affected any disturbance on the power rails. To get the best performance power supply characteristics and power supply de-coupling are critical. Dynamic Range will be affected by switching noise. To reduce switching noise large value power supply bypass capacitors must be used. This circuit uses a 0.1 F and 1.0 F ceramic capacitor as well as a 100 F low ESR tantalum capacitor between the VA_HP supply rail and ground. Optimally these should be placed as close to the CS44L11 pins 12 and 13 as possible. If a DC-DC converter is used in the system its switching frequency should be locked to the CS44L11 PWM switching frequency to reduce switching noise. Power supply source impedance has a direct affect on the output distortion. A DC-DC converter is a very low impedance source and will offer the best THD+N performance. Using a linear power supply offers the next lowest impedance, while running directly from batteries to the VA_HP pins offers the highest impedance and therefore the highest distortion. A 47 H inductor (L1) is used on the digital power supply of the CS44L11 to suppress noise. This may be omitted if system noise is not an issue in your design.
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3. OPERATION INFORMATION 3.1 Operating Instructions
1) Connect an optical or coaxial S/PDIF signal to the S/PDIF input (OPT1 or J5). 2) Connect the output to either headphones or an analog analyzer. If using the RCA test jacks (J8 and J9) a 16 dummy load is provided in circuit. If using the headphone jack (J3) please use a 16 dummy load or 16 headphones. 3) Verify that all power supplies are turned off and: a. Connect +5.0 V to the terminal marked +5 V (J4). b. Connect from +1.8 V to +2.4 V to the terminal marked VD_HP (J6). c. Connect from +1.8 V to +2.4 V to the terminal marked VA_IN (J7).
d. Connect the power supply common ground to the terminal marked GND. e. Verify that all power supply output voltages are set correctly to correspond to the setting on the CDB44L11 and apply power to the board. 4) Once power is applied the volume LEDs will illuminate. Adjust settings as required with buttons - note that the volume, bass, and treble buttons do not 'ramp' and must be pushed for each increment/decrement. The volume level will initialize at -24 dB.
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4. CONTROL FUNCTIONS 4.1 Control Buttons
The function of the Control Buttons (Tables 1 and 2) is as follows: * * * * * * * * Volume Up - Adds 1 dB to current volume setting. Volume Dn - Subtracts 1 dB from current volume setting. Treble Up - Adds 1 dB to current treble setting. Treble Dn - Subtracts 1 dB from current treble setting. Bass Up - Adds 1 dB to current bass setting. Bass Dn - Subtracts 1 dB from current bass setting. Mute - Mutes audio and sets PWM to modulated 50% duty cycle. Reset - Upon release of the RESET Button, the microcontroller loads the default settings from the flash memory into RAM. The RST line is pulled HI and these default settings are written to the CS44L11 and the CS8420.
4.2
LED Status
The CDB44L11 has 5 LEDs (D20 - D24) to indicate volume, tone and mute settings and 1 fault LED (D25). The LED readout will normally indicate the volume level per Table 1. When one of the Treble Up/Down or Bass Up/Down buttons is pressed, the LEDs will show the Treble Boost or Bass Boost setting as depicted in Table 2. When the button is released the LEDs will continue to show the Treble/Bass Boost setting for a period of 2 seconds and will then return to indicating the volume setting. In Table 1 and Table 2, a "1" indicates that the LED is lit up. The MUTE button toggles operation between mute and un-mute. When the amplifier is muted the LEDs flash at a 0.5 Hz rate. D25 (LED near the CS8420 Receiver) indicates when there is a loss of input signal or any other problem in the receiver.
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Volume [dB]
+12 +11 +10 +9 +8 +7 +6 +5 +4 +3 +2 +1 0 -1 -2 -3 -4 -5 -6 -7 -8 -9 -10 -11 -15 to -12 -18 to -16 -21 to -19 -24 to -22 -32 to -25 -36 to -33 -42 to -37 -48 to -43
LED Pattern D20
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 0 0 0 0 0 0 0
D21
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 0 0 0
D22
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
D23
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
D24
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
Treble or Bass Boost [dB]
0 1 2 3 4 5 6 7 8 9 10 11 12
LED Pattern D20
1 1 1 1 1 1 1 1 1 1 1 1 1
D21
1 1 1 1 1 1 1 1 0 0 0 0 0
D22
1 1 1 1 0 0 0 0 1 1 1 1 0
D23
1 1 0 0 1 1 0 0 1 1 0 0 1
D24
1 0 1 0 1 0 1 0 1 0 1 0 1
Table 2. Treble/Bass Boost Status LED Decodes
Table 1. Volume Status LED Decodes
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4.3 CS44L11 Initialization
Table 3 shows the CS44L11 register settings at startup. Refer to the CS44L11 Data Sheet for more information.
Addr
2h
Function
Power and Muting Control default Channel A Volume Control default Channel B Volume Control default Tone Control default Mode Control 1 default Limiter Attack Rate default Limiter Release Rate default Volume and Mixing Control default Mode Control2 default Mode Control 3 default Revision Indicator default
7
SZC1 1 VOLA7 1 VOLB7 0 BB3 0 BBCF1 0 ARATE7 0 RRATE7 0 IS1 0 MCLKDIV 0 DIF1 0 Reserved 0
6
SZC0 0 VOLA6 1 VOLB6 0 BB2 0 BBCF0 0 ARATE6 0 RRATE6 0 IS0 0 CLKDV1 0 DIF0 0 Reserved 0
5
PDN 1 VOLA5 1 VOLB5 0 BB1 0 TBCF1 0 ARATE5 0 RRATE5 1
4
FLT 0 VOLA4 0 VOLB4 0 BB0 0 TBCF0 0 ARATE4 1 RRATE4 0
3
RUPBYP 0 VOLA3 1 VOLB3 0 TB3 0 TC1 0 ARATE3 0 RRATE3 0 ATAPI3 1 0 CP_EN 1 REV3
2
RDNBYP 0 VOLA2 0 VOLB2 0 TB2 0 TC0 0 ARATE2 0 RRATE2 0 ATAPI2 0 0 FREEZE 0 REV2
1
Reserved 0 VOLA1 0 VOLB1 0 TB1 0 TC_EN 1 ARATE1 0 RRATE1 0 ATAPI1 0 DEM1 0 Reserved 0 REV1
0
Reserved 0 VOLA0 0 VOLB0 0 TB0 0 LIM_EN 0 ARATE0 0 RRATE0 0 ATAPI0 1 DEM0 0 Reserved 0 REV0
3h
4h
5h 6h 7h 8h 9h
RMP_SP1 RMP_SP0 0 CLKDV0 0 A=B 1 Reserved 0 0 DBS 0 VCBYP 0 Reserved 0
Ah Bh Ch
FRQSFT1 FRQSFT0
Read Only Read Only Read Only Read Only
Table 3. Initial CS44L11 Register Settings
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Figure 1. CS44L11 PWM Headphone Amplifier
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Figure 2. CS8420 S/PDIF Receiver and Sample Rate Converter
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Figure 3. Microcontroller
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Figure 4. Power Supply
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Figure 5. Assembly Drawing
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Figure 6. Top Layer
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Figure 7. Bottom Layer
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5. BILL OF MATERIALS
Item Rev 1 2 3 4 5 A A A A A Description CAP 1 F 10% 16V X7R 0805 CAP 220 F 10% 6V TANT CASE D CAP 0.01 F 10% 50V X7R 0805 CAP 100 F 20% 6.3V TANT CASE C CAP 0.1 F 10% 50V X7R 0805 Qty 9 2 2 0 16 Reference Designator C1 C15 C56 C60 C66 C67 C68 C69 C70 C2 C3 C5 C61 C6 C8 C9 C10 C11 C20 C22 C24 C25 C26 C47 C55 C57 C63 C64 C65 C71 C12 C16 C13 C17 C14 C18 C19 C21 C23 C27 C29 C30 C32 C52 C53 C54 C58 D25 GNDTP1 GNDTP2 GNDTP3 GNDTP4 GNDTP5 HP_A HP_B J1 J2 J3 J4 MFG KEMET KEMET KEMET VISHAY SPRAGUE KEMET MFG P/N C0805C105K4RAC T491D227K006AS C0805C103K5RAC 595D107X06R3C2T C0805C104K5RAC
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6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
A A A A A A A A A A A A A A A
CAP 0.1 F 10% 50V X7R 0805 CAP 0.33 F 10% 16V X7R 0805 CAP, 100 F 20% 6.3V TANT CASE C CAP 0.33 F 10% 16V X7R 0805 CAP 4700 pF 5% 50V C0G 1206 CAP 47 F 20% 16V ELEC CASE C CAP 1 F 10% 25V X7R 1206 CAP 0.22 F 10% 50V X7R 1206 CAP 1000 pF 5% 50V X7R 0603 CAP 33 pF 10% 50V C0G 0805 CAP 0.033 F 10% 50V X7R 0805 CAP 0.01 F 5% 50V X7R 0805 LED CLR GRN, 2.1V 1mA .16MCD, SMD LED CLR SRED, 1.7V 1mA 1.6MCD, SMD WIRE, JUMPER 2P, 0.1""CTR, BRASS
0 0 1 1 1 2 1 2 1 2 1 1 5 1 5
KEMET KEMET VISHAY SPRAGUE KEMET KEMET PANASONIC KEMET KEMET KEMET KEMET KEMET KEMET
C0805C104K5RAC C0805C334K4RAC 595D107X06R3C2T C0805C334K4RAC C1206C472J5GAC ECEV1CA470WR C1206C105K3RAC C1206C224K5RAC C0603C102J5RAC C0805C330K5GAC C0805C333K5RAC C0805C103J5RAC
D20 D21 D22 D23 D24 CHICAGO MINIATURE CMD28-21VGC/TR8/T1 CHICAGO MINIATURE CMD28-21SRC/TR8/T1 COMPONENTS CORPORATION KEYSTONE JOHNSON COMPONENTS SAMTEC A/D ELECTRONICS JOHNSON COMPONENTS TP-101-10
21 22 23 24 25
A A A A A
CONN, TEST PT, .1""CTR TIN PLATE BLK CONN, BPOST 2"" SILV, NYLON INS, BLK HDR 6x2, MLE .1""CTR, S GLD JACK STEREO HEADPHONE CONN, BPOST 2"" SILV, NYLON INS, RED
2 1 0 1 1
5001 111-0103-001
CDB44L11
TSW-106-07-G-D 3056-50 111-0102-001
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Item Rev 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 A A A A A A A A A A A A A A A A A A A A A A A A A A A
Description JACK RCA, RA-BLK, PHONO, GLD TABS CONN, BPOST 2"" SILV, NYLON INS, GRN CONN, BPOST 2"" SILV, NYLON INS, BLU CONN, DE9 FMLE, RT. ANGL HDR 3x1, MLE .1""CTR, S GLD HDR 3x1, MLE .1""CTR, S GLD IND 47 H, 10%, 1210 IND 100 H 20% CTGSR74B SERIES SM IND 220 H 20% CTGS54 SERIES SM IND 4.7 H 10% 0805 CONN, TEST PT, .1""CTR TIN PLATE BLK OPTICAL RCVR, 6Mb/s, 7V 20MA 10M TRAN, MOSFET nCHAN 750mA 20V SOT-23 RES 2.2k OHM 1/8W 5% 0805 FILM RES 1k OHM 1/16W 1% 0603 FILM RES 16 OHM 1/8W 5% 0805 FILM RES 5.1k OHM 1/8W 5% 0805 FILM RES 0 OHM 1/8W 1% 1206 FILM RES 51.1k OHM 1/16W 1% 0603 FILM RES 10k OHM 1/16W 1% 0603 FILM RES 0 OHM 1/8W 1% 1206 FILM RES 1.62k OHM 1/16W 1% 0603 FILM RES 0 OHM 1/10W 1% 0805 FILM RES 10k OHM 1/8W 5% 0805 FILM RES 1 OHM 1/8W 5% 1206 FILM RES 158k OHM 1/16W 1% 0603 FILM RES 432k OHM 1/16W 1% 0603 FILM
Qty 3 1 1 1 1 0 2 2 0 1 0 1 1 7 1 2 1 0 0 2 1 1 1 3 1 0 0
Reference Designator J5 J8 J9 J6 J7 J10 J11 J14 L1 L8 L3 L4 L5 L9 LRCK MCLK SCLK SDIN OPT1 Q1 R1 R5 R61 R62 R63 R64 R65 R2 R3 R17 R4 R6 R7 R8 R9 R18 R10 R11 R12 R14 R59 R68 R15 R16 R19
MFG A/D ELECTRONICS JOHNSON COMPONENTS JOHNSON COMPONENTS ADAM TECH SAMTEC SAMTEC PANASONIC CENTRAL TECHNOLOGIES CENTRAL TECHNOLOGIES PANASONIC KEYSTONE TOSHIBA MOTOROLA DALE DALE DALE DALE DALE DALE DALE DALE DALE DALE VISHAY DALE DALE DALE
MFG P/N ARJ-2018-NIL-1-NIL 111-0104-001 111-0110-001 DE09-SL-24 TSW-103-07-G-S TSW-103-07-G-S ELJFA470KF CTGSR74B-101M CTGS54-220M ELJFD4R7KF 5001 TORX173 MGSF1N02ELT1 CRCW0805222J CRCW06031001F CRCW0805160J CRCW0805512J CRCW1206000Z CRCW06035112F CRCW06031002F CRCW1206000Z CRCW06031621F CRCW0805000Z CRCW0805103J CRCW12061R0J CRCW06031583F CRCW06034323F
CDB44L11
Item Rev 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 A A A A A A A A A A A A A A A A A D1 A A A A A D
Description RES 191k OHM 1/16W 1% 0603 FILM RES 137k OHM 1/16W 1% 0603 FILM RES 69.8k OHM 1/16W 1% 0603 FILM RES 240 OHM 1/8W 5% 1206 FILM RES POT 500K 10%10TURN TOP-ADJ TH RES 10M OHM 1/10W 1% 0805 FILM RES 330k OHM 1/8W 5% 0805 FILM RES 33 OHM 1/8W 5% 0805 FILM RES 75 OHM 1/10W 1% 0805 FILM SWITCH 0/1 TACT, W/ESD IC, DIGITAL PWM HEADPHONE MONITOR,T IC LOG 8-BIT W/3-ST OUT REG SOIC16 IC LIN H-CUR L-NOISE CNVTR SSOP16 IC LOG, INVERT, 5P, UHS TINY, SOT23 IC LOG, 4 BUF W/3ST 14P TSSOP IC PGM, mCNTR 32K PQFP44 IC LNR 5V MCH RS-232 DRV/RCV SOIC16 IC CRUS DIG AUD SAMP RTE CNV SOIC28 SPCR, STANDOFF 4-40 THR, 0.875""L OSC 32.768KHZ 20ppm 8mm x 3.8mm SMT OSC 12.352MHZ 50PPM 5V FULL DIP14 DIODE, SCHTKY POWER RECT, SOD123 DIODE TRANS. SUPPRESSOR, 6.8V, 600W CONN, SHUNT, 2P, .1""CTR, BLK
Qty 0 0 2 2 0 1 1 3 1 8 1 1 0 2 2 1 1 1 4 1 1 0 3 3
Reference Designator R20 R21 R22 R24 R23 R25 R26 R57 R58 R66 R67 R78 R76 S1 S2 S3 S4 S5 S6 S7 S8 U1 U2 U3 U4 U20 U5 U6 U17 U18 U23 X1 X2 X3 X4 Y1 Y2 Z2 Z3 Z4 Z5 XJ2,XJ11,XJ14
MFG DALE DALE DALE DALE BOURNS DALE DALE PANASONIC DALE C&K CIRRUS LOGIC TEXAS INSTRUMENTS MAXIM FAIRCHILD SEMICONDUCTOR FAIRCHILD SEMICONDUCTOR MOTOROLA MAXIM CRYSTAL SEMICONDUCTOR KEYSTONE CITIZEN CAL CRYSTAL MOTOROLA MOTOROLA MOLEX
MFG P/N CRCW06031913F CRCW06031373F CRCW06036982F CRCW1206241J 3266W-1-504 CRCW08051005F CRCW0805334J ERJ6GEYJ330V CRCW080575R0F PTS645TL50 CS44L11-KZ/A SN74HC590AD MAX1706EEE NC7SZ04M5X 74VHC125MTC MC68HC908GP32CFB MAX232CWE CS8420-CS/D1 1809 CM200S32.768KDZFT CX21AF-12.3520MHZ MBR0520LT1 P6KE6.8 15-29-1025
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6. REVISION HISTORY
Release DB1
Date April 2004
Changes Initial Release
Table 4. Revision History
Contacting Cirrus Logic Support
For all product questions and inquiries contact a Cirrus Logic Sales Representative. To find the one nearest to you go to www.cirrus.com
IMPORTANT NOTICE Cirrus Logic, Inc. and its subsidiaries ("Cirrus") believe that the information contained in this document is accurate and reliable. However, the information is subject to change without notice and is provided "AS IS" without warranty of any kind (express or implied). Customers are advised to obtain the latest version of relevant information to verify, before placing orders, that information being relied on is current and complete. All products are sold subject to the terms and conditions of sale supplied at the time of order acknowledgment, including those pertaining to warranty, patent infringement, and limitation of liability. No responsibility is assumed by Cirrus for the use of this information, including use of this information as the basis for manufacture or sale of any items, or for infringement of patents or other rights of third parties. This document is the property of Cirrus and by furnishing this information, Cirrus grants no license, express or implied under any patents, mask work rights, copyrights, trademarks, trade secrets or other intellectual property rights. Cirrus owns the copyrights associated with the information contained herein and gives consent for copies to be made of the information only for use within your organization with respect to Cirrus integrated circuits or other products of Cirrus. This consent does not extend to other copying such as copying for general distribution, advertising or promotional purposes, or for creating any work for resale. CERTAIN APPLICATIONS USING SEMICONDUCTOR PRODUCTS MAY INVOLVE POTENTIAL RISKS OF DEATH, PERSONAL INJURY, OR SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE ("CRITICAL APPLICATIONS"). CIRRUS PRODUCTS ARE NOT DESIGNED, AUTHORIZED OR WARRANTED FOR USE IN AIRCRAFT SYSTEMS, MILITARY APPLICATIONS, PRODUCTS SURGICALLY IMPLANTED INTO THE BODY, LIFE SUPPORT PRODUCTS OR OTHER CRITICAL APPLICATIONS (INCLUDING MEDICAL DEVICES, AIRCRAFT SYSTEMS OR COMPONENTS AND PERSONAL OR AUTOMOTIVE SAFETY OR SECURITY DEVICES). INCLUSION OF CIRRUS PRODUCTS IN SUCH APPLICATIONS IS UNDERSTOOD TO BE FULLY AT THE CUSTOMER'S RISK AND CIRRUS DISCLAIMS AND MAKES NO WARRANTY, EXPRESS, STATUTORY OR IMPLIED, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR PARTICULAR PURPOSE, WITH REGARD TO ANY CIRRUS PRODUCT THAT IS USED IN SUCH A MANNER. IF THE CUSTOMER OR CUSTOMER'S CUSTOMER USES OR PERMITS THE USE OF CIRRUS PRODUCTS IN CRITICAL APPLICATIONS, CUSTOMER AGREES, BY SUCH USE, TO FULLY INDEMNIFY CIRRUS, ITS OFFICERS, DIRECTORS, EMPLOYEES, DISTRIBUTORS AND OTHER AGENTS FROM ANY AND ALL LIABILITY, INCLUDING ATTORNEYS' FEES AND COSTS, THAT MAY RESULT FROM OR ARISE IN CONNECTION WITH THESE USES. Cirrus Logic, Cirrus, and the Cirrus Logic logo designs and PopGuard are trademarks of Cirrus Logic, Inc. All other brand and product names in this document may be trademarks or service marks of their respective owners. IC is a registered trademark of Philips Semiconductor. Purchase of IC Components of Cirrus Logic, Inc., or one of its sublicensed Associated Companies conveys a license under the Philips IC Patent Rights to use those components in a standard IC system.
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