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STV5730A
MULTISTANDARD ON-SCREEN DISPLAY FOR VCR, PAY-TV, SATELLITE RECEIVER
. . . . . . . . . . . . . . . . . .
A CHARACTER GENERATOR WITH ASCII RAM AND CHARACTER ROM : - 128 characters - 12 dots x 18 lines character composition - 11 rows x 28 characters page composition ACCURATE INTERNAL BANDGAP VOLTAGE REFERENCE LINE LOCKED PLL VIDEO TIMING GENERATOR INPUT CVBS CLAMP AND SYNC EXTRACTOR VERTICAL SYNC SEPARATOR INPUT CVBS SYNC RE-INSERTION INPUT CVBS PRESENCE DETECTOR PAL/NTSC CHROMA ENCODER DEDICATED PINS FOR LUMA AND CHROMA EXTERNAL FILTERING GAIN ON CVBS OUTPUT FOR EITHER 0dB OR 6dB CAPABILITY MULTISTANDARD TRANSLUCENT MIXED MODE OPAQUE MIXED MODE NORMAL FULL PAGE MODE VIDEO FULL PAGE MODE SUITABLE FOR S-VHS THREE DIFFERENT MARKERS CAN BE GENERATED SIMULTANEOUSLY THREE WIRE SERIAL INTERFACE FOR MICROPROCESSOR CONTROL
SO28 (Plastic Micropackage) ORDER CODE : STV5730A
PIN CONNECTIONS
YOUT VIDEO IN RES FTR AVDD DV DD CSYNC XTAL IN XTAL OUT MUTE DATA
1 2 3 4 5 6 7 8 9 10 11 12 13 14
28 27 26 25 24 23 22 21 20 19 18 17 16 15
YIN VIDEO OUT1 VIDEO OUT2 CIN COUT LESCREEN LECHAR AGND DGND BAR CO FB
5730A-01.EPS
DESCRIPTION The STV5730A IC is intended to be used in VCR, Satellite receiver and PAY-TV systems for CVBS or R/G/B text/graphics insertion.
February 1996
CLK CSN R
B G
1/20
STV5730A
PIN DESCRIPTION
N 1 2
o
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 2/20
Type Description Analog Output This pin outputs the luma to allow the user to notch filter it. This pin may be connected to the YIN input for minimum cost applications. VIDEO IN Analog Input This is the CVBS input. An external capacitor is needed for clamp operation. The STV5730A extracts the sync from this signal when the C7 control bit is set. RES Analog Pin it must be tied to an external resistor to control the PLL f0 frequency. FTR Analog Pin it must be tied to the line PLL loop filter. Supply Pin 5V analog supply pin. AVDD DVDD Supply Pin 5V digital supply pin. CSYNC Bidirectional This pin inputs the mixed mode composite sync when the C7 control bit is Pin cleared. It outputs the video in extracted sync when the C7 control bit is set. XTAL IN Digital Input This is the 4*fsc quartz input. The quartz may be started or stopped under control of dedicated serial interface messages. Alternatively, a 4fsc clock can be input directly. The stop message must not be used in this case. XTAL OUT Digital Output This is the 4*fsc quartz output. The quartz may be started or stopped under control of dedicated serial interface messages. MUTE Digital Output This pin indicates if the CVBS input signal is present on VIDEO IN input pin. It is forced low if the M2 mode bit is cleared. DATA Digital Input This is the serial interface data input. CLK Digital Input This is the serial interface clock input. CSN Digital Input This is the serial interface chip select input. R Digital Output This is the Red signal output. It is forced low during the horizontal and vertical blanking intervals. G Digital Output This is the Green signal output. It is forced low during the horizontal and vertical blanking intervals. B Digital Output This is the Blue signal output. It is forced low during the horizontal and vertical blanking intervals. FB Digital Output This is the fast blanking output. It is delivered to control an external R/G/B switch for R/G/B or TV applications. CO Digital Output This is the character activity output. It indicates if a character foreground is being displayed, and can be used to control its intensity. BAR Digital Input This input forces the PLL in free run mode when active. It is enabled if the M0 mode bit is set. DGND Supply Pin 0V digital ground. AGND Supply Pin 0V analog ground. LECHAR Analog Input This pin determines the character intensity level in external bias mode (ie when the C10 control bit is set). This level must be defined relative to the internal black reference. A variable luminance signal may be entered. To be grounded if not used. LESCREEN Analog Input This pin determines the screen intensity level in external bias mode (ie when the C10 control bit is set). This level must be defined relative to the internal black reference. A variable luminance signal may be entered. To be grounded if not used. COUT Analog Output This pin outputs the full page mode chroma for external filtering (and attenuation if necessary). This pin may be connected to CIN for minimum cost applications. CIN Analog Input This pin inputs the filtered chroma. VIDEO OUT2 Analog Output If the M7 mode bit is cleared : this pin is a CVBS output that delivers the VIDEO IN signal. The sync is re-inserted if the M4 mode bit is set. The output amplitude may be either 0dB or +6dB according to the M5 mode bit. If the M7 mode bit is set : It outputs the currently active synchronism. The signal amplitude is controlled by the M5 mode bit. If the M8 mode bit is cleared : VIDEO OUT2 is in high impedance state. VIDEO OUT1 Analog Output This is a CVBS output. It delivers the VIDEO IN + text in mixed mode and the CVBS text in full page mode. The output signal amplitude may be either 0dB or 6dB according to the M5 mode bit. The sync is re inserted if the M4 mode bit is set. YIN Analog Input This pin inputs the notch filtered luma.
Name YOUT
5730A-01.TBL
STV5730A
BLOCK DIAGRAM
YIN CIN
25 28
STV57 30A
27 VIDEO
OUT1
VIDEO IN
2
CLAMP
SYNC INSERTION COMPOSITE SYNC EXTRACTION
TEXT INSERTION
GAIN
26 VIDEO
OUT2
DISABLE
8
XTAL IN
CSYNC
7
VERTICAL SYNC S EPARATION
H AND V SCANNING
ASCII RAM
CHARACTER ROM
PAL/NTSC ENCODER & SATURATION
XTAL OUT 24 COUT
9 14 R
BAR 19
LINE LOCKED P LL
PLXCLK
RAM ADDRESS GENERATOR
COLOR LOGIC
15 G 16 B 17 FB 18 CO
AVDD DVDD
5 6
CONTROL
LUMA & SYNC GENERATION VIDEO DETECTOR
1
YOUT
AGND 21 DGND 20
4 3
SERIAL BUS INTERFACE
BIAS LEVEL GENERATION
22 LECHAR
5730A-02.EPS 5730A-03.TBL 5730A-02.TBL
23 LESCREEN
11
12
13
10
FTR
RES
DATA CLK CSN
MUTE
ABSOLUTE MAXIMUM RATINGS
Symbol DVDD AVDD Tj Digital Supply Voltage Analog Supply Voltage Junction Temperature Parameter Value 7 7 150 Unit V V
o
C
THERMAL DATA
Symbol Rth (j-a) Parameter Junction-ambient Thermal Resistance Typ. Value 70 Unit
o
C/W
3/20
STV5730A
ELECTRICAL CHARACTERISTICS (TA = 0oC to 70oC, AVDD = DVDD = 5V, unless otherwise specified)
Symbol DVDD DIDD AVDD AIDD AVDD-DVDD DVOH DV OL DVIH DV IL DIIH DIIL BW Parameter Digital Supply Voltage DVDD - DGND Digital Supply Current Analog Supply Voltage Analog Supply Current Analog to Digital Supply Voltage Difference Digital Output Voltage High Level (ILOAD = -1mA) Digital Output Voltage Low Level (ILOAD = +1mA) Digital Input Voltage High Level Digital Input Voltage Low Level Digital Input Current High Level Digital Input Current Low Level Bandwidth at pins : VIDEO IN, VIDEO OUT1, VIDEO OUT2, CIN, YIN, YOUT, COUT Sync Pulse Range Clamp Voltage External Capacitor Output Dynamic Range Black Level Voltage Output Capacitor Load Output Resistor Load Output Impedance Output Dynamic Range Black Level Voltage Output Capacitor Load Output Resistor Load Output Impedance Gain Dispersion 0dB 6dB CIN (Pin 25) CCIN RCIN YIN (Pin 28) CYIN YOUT (Pin 1) VYOUT CLYOUT RLYOUT COUT (Pin 24)
5730A-04.TBL
Min. 4.75 4.75 -200 DV DD - 0.5 0.75 x (DV DD - DGND)
Typ. 5.0 5.0 0
Max. 5.25 10 5.25 25 200 DGND + 0.5
Unit V mA V mA mV V V V V A A MHz
0.15 x (DVDD - DGND) 1 -1 8.0
VIDEO IN (Pin 2) VSYNCIN VCL CIN VOUT1 C L1 R L1 ZOUT1 VOUT2 C L2 R L2 ZOUT2 100 1.10 1.30 2.2 650 1.50 mV V F V V pF k V V pF k dB dB pF k pF 3.5 15 10 3.5 15 10 V pF k V pF k
VIDEO OUT1 (Pin 27) 2.0 2.20 2.45 4.4 2.70 20 10
250 2.0 2.20 4.4 2.70 20 10
VIDEO OUT2 (Pin 26) 2.45
250 -1 5 0 6 0.5 50 0.5 0.5 +1 7
GAIN (Pins 26- 27)
Input Capacitance Input Resistance Input Capacitance Output Dynamic Range Output Capacitor Load Output Resistor Load Output Dynamic Range Output Capacitor Load Output Resistor Load
VCOUT C LCOUT R LCOUT
0.5
4/20
STV5730A
ELECTRICAL CHARACTERISTICS (TA = 0oC to 70oC, AVDD = DVDD = 5V, unless otherwise specified) (continued)
Symbol LESCREEN (Pin 23) VLESCR Input Level 1.0 3.0 V Parameter Min. Typ. Max. Unit
LECHAR (Pin 22) VLECH Input Level 1.0 3.0 V
INTERNAL SIGNAL LEVELS (Pins 1- 24) VSYNC VBLACK VSCREEN VCHAR V1 V2 V3 VCH1PP VCH2PP Internal Sync Level Internal Black Level Internal LESCREEN Internal LECHAR Difference Level between Black and Sync Level Difference Level between Screen and Black Level Difference Level between Char. and Screen Level Chroma Amplitude for blue or yellow colors for red, magenta, green or cyan colors 250 100 450 1.1 0.95 1.25 1.4 1.9 300 150 515 320 420 580 350 200 580 1.4 V V V V mV mV mV mVPP mVPP mVPP
VBURSTPP Burst Amplitude
BUS (Pins 11- 12 - 13) fCLK tCWL tCWH tCSWL tCSWH tDCLH tCLD tCLCSL tCSLCLL tCLHCSH tCSHCL CLK Frequency Range CLK Width Low CLK Width High CSN Width Low CSN Width High DATA Valid to CLK High CLK High to DATA Unvalid CLK Valid to CSN Low CSN Low to CLK Low CLK High to CSN High CSN High to CLK Unvalid 0 200 200 maxHZ* x 4 maxHZ* x 4 100 100 100 100 100 100 2 MHz ns ns s s ns ns ns ns ns
5730A-05.TBL 5730A-03.EPS
ns
* maxHZ is the maximum horizontal zoom factor that is used
Figure 1
DATA
t DCLH
CLK
t CLD t CSHCL t CWL t CSLCLL t CSWL t CSWH t CWH t CLHCSH
t CLCSL
t CLCSL
CSN
5/20
STV5730A
TYPICAL PAL/NTSC/SECAM APPLICATION
EXTERNAL RGB TEXT INSERTION (SCART) CHROMA BP FILTER (see Note 1)
CVBS OUT
68
+5V
68
+5V
+5V
+5V
+5V
68
(see Note 3)
TRANSLUCENT MODE
CHROMA TRAP
+5V
68
+5V
68
LUMA FILTER (see Note 1)
28
27
26
25
24
23
22
21
20
19
18
17
16
10
11
S T V 5 7 3 0 A
12
13
4.3k
2.2 F
10 H
CVBS IN (see note 4)
XTAL x 4fsc
14
1
2
3
4
5
6
7
8
9
15
180
180
R1
180
Ext. 4 fsc OSC IN (see Note 2)
CSYNC (IN or OUT)
TO MICRO
Analog Ground
Digital Ground
220pF
22nF
22k
+5V
180
5730A-04.EPS
Notes : 1. 2. 3. 4.
Optional filter. For low cost applications, short circuit. The 4fsc (17.734MHz PAL, 14.318MHz NTSC) crystal may be ommited if this signal is already available in a system. External bias level can be set by resistor ratio as required. The level at pins LECHAR and LESCREEN must not exceed 3.0 Vdc. Output impedance of the driving stage should be less than 300.
6/20
39pF
39pF
220nF
220nF
180
STV5730A
FUNCTIONAL DESCRIPTION The STV5730A operates in "mixed mode" or "full page mode" : - Mixed mode : the device is line locked to the incoming CVBS signal. The text is superimposed over the CVBS input eitherin B&W or translucent. It may also be superimposed in color by using the R/G/B outputs. - Full page mode : the device generates a colored PAL or NTSC CVBS output and simultaneous R/G/B outputs. Both "normal full page" and "video full page" modes are supported by the STV5730A. In the "normal full page" the screen background is uniformely colored, while the "video full page" mode permits to display the unlocked VIDEO IN signal in the screen background area. It performs the following text features : - Page composition : 11 rows X 28 characters - Number of displayed characters : 308 (max) - Character composition : 12 dots X 18 lines - ROM character set : 128 user definable characters - Screen display positions : 58 horizontal positions, 63 vertical positions - Row position offset , each row : Xoffset from 0 to +15, Yoffset from -17 to +17 - Display enable : each row or page - Character color : 1 out of 8, each character - Character background color : 1 out of 8, character and page enabled or set identical to character color - Character border color : 1 out of 8, row enabled or set identical to character color - Page background color : 1 out of 8 - Zoom : 3 independant zoom factors for rows 0, 1 to 9 and 10. - Zoom factors : four independant X and Y zoom factors - Blink : character and page enabled - Blink frequency : 0.5 or 1.0 second - Blink duty cycle : 0.25, 0.5 or 0.75
1 - THE INTERNAL RAM BUFFER It stores the page (i.e. the text definition) and the row attributes. 1.1 - Page The page includes 11 row buffers, numbered from 0 to 10. Each row buffer includes 28 characters, numbered from 0 to 27. The characters may be written one by one by the microprocessor for random access. They also may be written sequentially, starting with any character address. 1.2 - Character Format and Attributes
11 BE 10 R 9 G 8 B 7 BK 6 CHARACTER CODE 0
CHARACTER CODE : 1 character out of 128 from the character ROM BK : BK=0 : character blink disabled BK=1 : character blink enabled R/G/B : Character color : 000 black 001 blue 010 green 011 cyan 100 red 101 magenta 110 yellow 111 white BE : BE=0 : the character background is disabled BE=1 : the character background is enabled
7/20
STV5730A
FUNCTIONAL DESCRIPTION (continued) 1.3 - Row Attributes There are 11 row attributes, numbered from 0 to 10. They may be written one by one or sequentially. The row attribute format is as follows :
11 HPOS OFFSET 8 7 RE 6 FBE 5 VPOS OFFSET 0
VPOS OFFSET : the MSB is the sign bit (0 : positive, 1 : negative). If the offset is positive (from 0 to +17), then the corresponding number of lines are added on top of the row (i.e. it moves downwards). These extra lines are colored according to the character background rules. If the offset is negative (from -1 to -17), then the corresponding number of lines are subtracted from the display of the row. FBE : FBE=0 : the characters are displayed without border FBE=1 : the characters are displayed with border RE : RE=0 : the characters of the row are not displayed. They are replaced by the page background color. RE=1 : the characters of the row are displayed. HPOS OFFSET : The display of the row is shifted to the right by the corresponding number of pixels (from 0 to 15). 1.4 - The Control Registers There are 5 registers for microprocessor control. They can be written individually or sequentially : - the ZOOM register address : 12 - the COLOR register 13 - the CONTROL register 14 - the POSITION register 15 - the MODE register 16 1.4.1 - Zoom Register
11 VZb1 10 VZb0 9 HZb1 8 HZb0 7 VZm1 6 VZm0 5 HZm1 4 HZm0 3 VZt1 2 VZt0 1 HZt1 0 HZt0
HZt[1:0] : Top row horizontal zoom factor (ie row 0) HZt[1:0] = 00 : 1 pixel per character dot 01 : 2 pixels per character dot 10 : 3 pixels per character dot 11 : 4 pixels per character dot VZt[1:0] : Top row vertical zoom factor VZt[1:0] = 00 : 1 pixel per character line 01 : 2 pixels per character line 10 : 3 pixels per character line 11 : 4 pixels per character line HZm[1:0] : Same as HZt[1:0], for middle rows (ie rows 1 to 9) VZm[1:0] : Same as VZt[1:0], for middle rows HZb[1:0] : Same as HZt[1:0], for bottom row (ie row 10) VZb[1:0] : Same as VZt[1:0], for bottom row The output of this register is synchronized by the horizontal synchronism. The RESET message clears this register.
8/20
STV5730A
FUNCTIONAL DESCRIPTION (continued) 1.4.2 - Color Register (page attributes)
11 R 10 G SBC 9 B 8 R 7 G FBC 6 B // // // 2 R 1 G BCC 0 B
SBC FBC BCC
: screen background color : character border color : character background color
The output of this register is synchronized by the horizontal synchronism. 1.4.3 - Control Register
11 C11 10 C10 9 C9 8 C8 7 C7 6 C6 5 C5 4 C4 3 C3 2 C2 1 C1 0 C0
C0
: C0 = 0 : mixed mode C0 = 1 : full page mode C1 : C1 = 0 : the character background is controlled by BE (see character word description) C1 = 1 : all displayed character backgrounds are disabled C2 : C2 = 0 : display off C2 = 1 : display on C3 : C3 = 0 : the characters are colored according to the character attribute and the color register values (i.e. CBACKG and CBORD) C3 = 1 : the character foreground, border and background colors are all set to the character attribute value (see paragraph 1.2). This option is mainly intended for full page mode, CVBS or Y/C output C4 : C4 = 0 : 1.0 second blinking period C4 = 1 : 0.5 second blinking period C[6:5] : C[6:5] = 00 : blinking off 01 : 0.75 blinking duty cycle 10 : 0.5 blinking duty cycle 11 : 0.25 blinking duty cycle C7 : C7 = 0 an external input composite sync is taken from the CSYNC pin C7 = 1 the sync is extracted by the STV5730A.The currently active sync is output on the CSYNC pin C8 : C8 = 0 : the standard is NTSC, 60Hz C8 = 1 : the standard is PAL or SECAM with M6 = 0, 50Hz C9 : C9 = 0 : character color encoding is disabled C9 = 1 : character color encoding is enabled C10 : C10 = 0 : the luminance levels are generated internally C10 = 1 : the luminance levels are provided by the LESCREEN and LECHAR input pins. C11 : C11 = 0 : Video Full Page Mode. A stable full page mode text is displayed while the screen background is the unlocked video input signal. C11 = 1 : Normal full page mode is active. The output of this register is synchronized by the horizontal sync (except C7). The RESET message clears this register.
9/20
STV5730A
FUNCTIONAL DESCRIPTION (continued) 1.4.4 - Position Register
11 VERTICAL POSITION 6 5 HORIZONTAL POSITION 0
HORIZONTAL POSITION VERTICAL POSITION 1.4.5 - Mode Register
11 M11 10 M10 9 M9
Any value from 6 to 63 Any value from 1 to 63
8 M8 7 M7 6 M6 5 M5 4 M4 3 M3 2 M2 1 M1 0 M0
M0 : M0 = 0 M0 = 1 M1 : M1 = 0 M1 = 1 M2 : M2 = 0 M2 = 1 M3 : M3 = 0 M3 = 1 M4 : M4 = 0 M4 = 1 M5 : M5 = 0 M5 = 1 M6 : M6 = 0 M6 = 1 M7 : M7 = 0 M7 = 1 M8 : M8 = 0 M8 = 1 M9 : M9 = 0 M9 = 1 M10 : M10 = 0 M10 = 1 M11 : M11 = 0 M11 = 1
: : : : : : : : : : : : : : : : : : : : : : : :
the BAR pin is disabled the BAR pin has an action on the line PLL the missing sync pulses are not detected the missing sync pulses are detected the MUTE pin is forced to 0 the MUTE pin delivers the internal MUTE signal the MUTE time constant is 8 lines the MUTE time constant is 32 lines the sync is not re-inserted the sync is re-inserted for improved text stability the gain of pins VIDEO OUT1 & VIDEO OUT2 is 0dB. the gain of pins VIDEO OUT1 & VIDEO OUT2 is 6dB. the color encoder is enabled (PAL or NTSC) the color encoder is disabled (B&W or SECAM) the VIDEO OUT2 pin outputs the VIDEO IN signal the VIDEO OUT2 pin outputs the composite sync the VIDEO OUT2 pin is in low impedance state the VIDEO OUT2 pin is in high impedance state Normal mode CSYNC Pin outputs the burst gate, BAR Pin outputs the VSYNC (see Note) No delay compensation It enables the delay compensation of the internal sync extractor. The mute signal output is synchronized on vertical sync in order to limit its transitions. The mute signal is not synchronized on vertical sync thus accelerating the VIDEO IN presence detection (useful in full page mode).
Note : This mode overides the normal functions of Pins CSYNC and BAR.
10/20
STV5730A
FUNCTIONAL DESCRIPTION (continued) 2 - THE MICROPROCESSOR SERIAL INTERFACE The STV5730A is down loaded by the microprocessor through a three wire serial interface : DATA, CLK, CSN. The CLK and CSN signals are internally ORed in order to validate the transfer when the STV5730A is chip selected only (i.e. CSN = 0). The CSN rising edge validates the internal data transfer. 2.1 - Message Formats (see Figure 2) 16-bit, 8-bit and 0-bit formats are available. The 8-bit and 0-bit message formats may be useful to speed up the STV5730A down loading.
15 0 0 0 12 0 11 BUF[11:8] 8 7 6 STRU[7:6] 5 0 4 DEPL[4:0] 0 ADDRESS
This 16-bit address message loads the serial interface write pointer. This address is incremented after each data message.
15 0 12 1 11 DATA[11:0] 0 DATA
0
0
This 16-bit data message writes the data at the location indicated by the write pointer.
7 DATA[7:0] 0 DATA
This 8-bit data message writes the data at the location indicated by the write pointer. The 4-bit data MSB is copied from the last previous 16-bit data message. The 0-bit data message writes a data at the location indicated by the write pointer. The last data is used from the previous 8-bit or 16-bit data message.
15 0 0 1 12 0 11 don't care 0 CONTROL
This 16-bit control message stops the 4*fsc quartz oscillator.
15 0 12 1 11 don't care 0 CONTROL
0
1
This 16-bit control message resets the circuit and starts the 4*fsc quartz oscillator. This message should not be used if an external 4 x fsc clock is used instead of the quartz. It is mandatory that reset operation is as described in paragraph 2.3.
11/20
STV5730A
FUNCTIONAL DESCRIPTION (continued) Figure 2
15 14 13 12 2 1 0
DATA
CLK
16-BIT MESSAGE
CSN
7 6 5 4 3 2 1 0
DATA
CLK
8-BIT MESSAGE
CSN
DATA
CSN
2.2 - The Write Pointer As described in the "message format" paragraph, an address consists of three fields : STRU[7:6], BUF[11:8], DEPL[4:0]. The STRU[7:6] field indicates whether it is a PAGE address or a ROW ATTRIBUTE / REGISTER address. It also determines the address incrementation scheme. - STRU[7:6] = 00 : It is a PAGE address. BUF provides the row number (from 0 to 10) and DEPL provides the character number (from 0 to 27). DEPL is incre2.2.1 - Address Map PAGE : ROW 0 ROW 1 ......... ROW 10 : : : : STRU[7:6] = 0 or 1 - BUF[11:8] = 0 - DEPL[4:0] from 0 to 27 STRU[7:6] = 0 or 1 - BUF[11:8] = 1 - DEPL[4:0] from 0 to 27 ................. ..................... ................ STRU[7:6] = 0 or 1 - BUF[11:8] = 10 - DEPL[3:0] from 0 t0 27 mented after each data message. When the write of a row is completed, the write pointer is automatically set to the next row first character. - STRU[7:6] = 01 : It is also a PAGE address but the incrementation scheme is a bit different : when the write of a row is completed, the write pointer is automatically set to the first character of the same row. - STRU[7:6] = 11 : It is a row attribute or a register address.The BUF field must be set to 0000 and the DEPL field is incremented after each data access.
ROW ATTRIBUTES : STRU[7:6] = 11 - BUF[11:8] = 0 - DEPL[4:0] from 0 to 10 REGISTERS : STRU[7:6] = 11 - BUF[11:8] = 0 DEPL[4:0] = 12 for ZOOM register, 13 for COLOR register, 14 for CONTROL register, 15 for POSITION register, 16 for MODE register
12/20
5730A-05.EPS
CLK
0-BIT MESSAGE
STV5730A
FUNCTIONAL DESCRIPTION (continued) 2.3 - Initialization and Down-loading Sequence It is important that the STV5730A is correctly reset and initialized after the circuit is powered prior to any writing. This routine is shown in Figure 3. The two initialization bytes (00db 1000) must procede the reset instruction (x2) every time it is transmitted. Figure 3
RESET & INITIALIZE 3000H 3000H 00dbH 1000H
The STV5730A PLL is also insensitive to the head switching disturbing the synchronism in VTR applications (playback). The missing pulses may be detected. The M1 mode bit enables the detection. In addition, the BAR input pin is available to enter a signal that forces the PLL in free-run mode. This capability may be used for search mode in VTRs, to improve the loop robustness against the noise bar. The BAR input is enabled by the M0 mode bit. 3.2 - Horizontal Sync Re-insertion This mechanism is of interest in mixed mode, to cancel the text horizontaljitter when the sync signal is too bad. It is activated by the M4 mode bit and must be turned off in full page mode. The active part of the line is protected against parasitic sync insertion. The modified sync is active on all output pins (ie CSYNC if C7 is set, VIDEO OUT1, VIDEO OUT2). A jitter greater than 0.42usec cannot be cancelled. 3.3 - Full Page Mode Behavior In this case, the PLL is locked on an internal 64usec reference derived from the 4*fsc quartz. The STV5730A generates a non interlace output. 4 - MUTE The STV5730A monitors the sync to determine whether it is a stable signal or not. MUTE = high : no stable signal MUTE = low : stable CVBS input signal The MUTE search time constant may be either 8 lines or 32 lines, according to the M3 mode bit. The signal that is delivered to the MUTE output pin is synchronized on the vertical sync if M11 is cleared. It is forced low if the M2 mode bit is low. This signal may be monitored by the microprocessor to switch the STV5730A from mixed mode to full page mode and vice versa (using the C0 control bit). 5 - THE LUMA GENERATOR The luma signal is generated by the STV5730A from timing information created by the character and video timing generators and voltage levels created by the internal bias level generator or entered on the LESCREEN and LECHAR pins (as selected by the C10 control bit). The luma signal is output on the YOUT pin to allow the user to notch filter it. It is then re-input on the YIN pin. YOUT and YIN may be connected together for minimal cost applications.
13/20
Set Control Registers * Zoom * Color * Control * Position * Mode
Set Row Attributes * 0 to 10
Set RAM Attributes i.e. TEXT PAGE * Write Pointer * Data * etc.
5730A-14.EPS
Next Page Write
STOP
3 - THE LINE LOCKED PLL The PLL frequency is 504 * fH = 7.875MHz. 3.1 - Mixed Mode Behavior In mixed mode, the internal PLL is line locked to the incoming CVBS signal. The sync is either extracted by the STV5730A (if C7 control bit is set) or provided by the application in a composite form on the CSYNC pin (if C7 control bit is cleared). The STV5730A separates the vertical sync from the composite synchronism. The STV5730A PLL features built-in protection mechanismsagainst missing and parasitichorizontal sync pulses. These mechanisms are activated when the loop is locked.
STV5730A
FUNCTIONAL DESCRIPTION (continued) 5.1 - Internal Bias Mode This mode is intended for minimal cost applications. C10 must be cleared. The luma levels of the OSD output signal are as follows : - LEBLACK : black level nominal value : 1.25V - LESYNC : sync level nominal value : LEBLACK - 300mV - LESCREEN : page background level nominal value : LEBLACK + 150mV - LECHAR : character level nominal value : LEBLACK + 650mV LEBLACK is also used to clamp the VIDEO IN signal and to create the character border. 5.2 - External Bias Mode This mode is intended to give more flexibility to the user. C10 must be set. The LESCREEN and LECHAR levels may be user defined relatively to the internal LEBLACK level. The final luma amplitude should not be greater than the peak white level. These levels may be static or dynamic. Dynamic levels can be easily generated by analog sum of the R/G/B and CO STV5730A outputs (a few resistors are necessary) to give grey scale character shading in the mixed mode. C0 is useful to control the character foreground luma level. 6 - THE CHROMA GENERATOR The STV5730Aencoder operates in full page mode only. It may performPAL or NTSC encodingaccording to the C8 control bit. A 4*fsc chroma quartz crystal is necessary (fsc = 4.43MHz for PAL, 3.58MHz for NTSC). The encoder can be turned off by the M6 mode bit for black & white or for SECAM applications. The character encoding is controlled by the C9 control bit. The chroma signal is output on the COUT pin for external filtering and for attenuation if necessary. It is then re-entered on the CIN pin and added to the YIN pin signal to create the final CVBS output signal. The chroma saturation is controlled by the STV5730A : - burst nominal amplitude : 320mVPP - blue or yellow colors nominal amplitude : 420mVPP - red, magenta, green or cyan colors nominal amplitude : 580mVPP
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7 - THE MARKERS The STV5730A can generate 3 different markers that can be activated simultaneously (i.e. on the same page). The following marker features are performed : - Blinking character, character background off. The character foreground blinks (BK = 1, BE = 0 or C1 = 1). - Not blinking character, character background on (C1 = 0, BE = 1). - Blinking character, character background on. The character foreground blinks and the character background remains (BK = 1, BE = 1, C1 = 0). 8 - THE TRANSLUCENT MIXED MODE Figure 4 : The Translucent Mixed Mode Output Configuration
VIDEO OUT1 1 R1 S R2 VIDEO OUT2
28
disa ble
S TV5730A
The VIDEO OUT1 and VIDEO OUT2 outputs may be summed via two external resistors to create a translucent text (mixed mode). In this case, the background picture is still visible behind the text. The background picture visibility (or level of translucence is controlled by the resistor ratio. Another benefit from this function is to allow PAL/SECAM/NTSC multistandard applications to be built with no SECAM chroma re-insertion filter and no additional control switches. The sum may be cancelled by setting the M8 mode bit. In this case, the VIDEO OUT2 pin is in high impedance state and the resistor network delivers VIDEO OUT1 only. When using the resistor network, please set M8 in the following cases : - in full page mode - when OSD in not displayed - to select opaque text. This allows the viewer to select by software the preferred display mode. The DC levels of the VIDEO OUT1, VIDEO OUT2 and the sum signals are high enough to directly drive a NPN emitter follower driver (see Table 1).
5730A-06.EPS
STV5730A
FUNCTIONAL DESCRIPTION (continued) 9 - VIDEO FULL PAGE MODE In addition to the normal full page mode in which a uniformely colored screen background is generated, the STV5730A is able to perform a "video full page mode". Normal and video full page mode are selected by the control bit C11 (respectively set high and low). By using the video full page mode the channel capture operation can be easily monitored on the screen since the signal at the VIDEO IN input is displayed, unlocked, in the screen background area ; the text being stable and colored, with or without colored background. Presence detection is permanently active to keep the microcontroller informed of the input signal quality. The information is delivered by the MUTE pin. This information can be used by the microcontroller to force the STV5730A into the mixed mode (set C0 low) when the input signal becomes good enough. Table 1
FULL PAGE PAL/NTSC VIDEO OUT1 VIDEO OUT2 S CVBS (OSD) High impedance CVBS (OSD) MIXED MODE TRANSLUCENT PAL/NTSC/SECAM VIDEO IN or Text VIDEO IN VIDEO IN or R2 x Text + R1 x VIDEO IN R1 + R 2 OPAQUE PAL/NTSC VIDEO IN or Text High Impedance VIDEO IN or Text
In the video full page mode, it can be usefull to set the M11 (mode register) bit high, so that the mute signal is not synchronized on the vertical sync, thus accelerating the VIDEO IN presence detection. 10 - S-VHS APPLICATION (see Figure 5) The STV5730Acan be used in S-VHS applications easily. The Y signal must be delivered to the VIDEO IN input. The VIDEO OUT1 output then delivers a Y + text signal, whilst the VIDEO OUT2 delivers the Y input signal, provided that the CIN input is connected to a bias DC level. An external switch must be used to select the C signal in mixed mode or the COUT output signal in full page mode. In mixed mode the chroma signal (C) can be externally attenuated (multistandard translucent operation) or killed (PAL/NTSC opaque operation only) during the character gate controlled by the fast blanking signal.
Figure 5 :
S-VHS Input/Output Configuration
STV5730A
R1 Y 2 VIDEO IN VIDEO OUT1 1 VIDEO OUT2 28 R2 YOSD Y or Te xt R 2 * Te xt R 1 Y or R1 R2 FP 23 CIN
FB
15
Full page mode Opaque mixed mode
*
Y Trans luce nt mixed mode
INTERNAL BIAS COUT 22
OP TIONAL FILTER
MM
EXTERNAL SWITCH
C
C
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5730A-07.EPS
CHARACTER GATED ATTENUATOR
Mixed Mode (MM) Full Page Mode (FP)
STV5730A
FUNCTIONAL DESCRIPTION (continued) 11 - THE CVBS OUTPUT PICTURE The following tables show the picture design in CVBS output mode (VIDEOout1 analog output pin) according to : - Blink on/off (BK character attribute & C[6:5] control bits) - Character background on/off (BE character attribute & C1 control bit) - Character border on/off (FBE row attribute) 11.1 - Mixed Mode
CHARACTER FOREGROUND Not Blinking and Char Backg off Not Blinking and Char Backg on Blinking and Char Backg off Blinking and Char Backg on LESCREEN LECHAR LECHAR CHARACTER BORDER if on LEBLACK LEBLACK LESCREEN video video CHARACTER BORDER if off CHARACTER PAGE BACKGROUND BACKGROUND video video
11.2 - Full Page Mode
CHARACTER FOREGROUND Not Blinking and Char Backg off Not Blinking and Char Backg on Blinking and Char Backg off Blinking and Char Backg on LECHAR + CCHAR LECHAR + CCHAR CHARACTER BORDER if on LEBLACK + CBORD LEBLACK + CBORD CHARACTER BORDER if off CHARACTER PAGE BACKGROUND BACKGROUND
LESCREEN + CSCREEN LESCREEN + CBACKG LESCREEN + CSCREEN LESCREEN + CSCREEN
LESCREEN + CSCREEN LESCREEN + CBACKG
CCHAR is a character attribute. C3 = 0 : CSCREEN, CBACKG and CBORD are page attributes, defined by the color register. C3 = 1 : CSCREEN is defined by the color register. CBACKG and CBORD are identical to CCHAR and thus are character attributes.
16/20
STV5730A
FUNCTIONAL DESCRIPTION (continued) 12 - THE R/G/B OUTPUT PICTURE The following tables show the picture design in R/G/B output mode, according to : - Blink on/off (BK character attribute & C[6:4] control bits) - Character background on/off (BE character attribute & C1 control bit) - Character border on/off (FBE row attribute) - C3 = 0 : CSCREEN, CBACKG and CBORD are page attributes, defined by the color register. - C3 = 1 : CSCREEN is defined by the color register. CBACKG and CBORD are identical to CCHAR and thus are character attributes. It is recommended to use CO output signal in this case. An R/G/B external switch must be controlled by the STV5730AFB output to perform the character insertion. C0 may be used as an additional character intensity signal. 12.1 - Mixed Mode
CHARACTER FOREGROUND Not Blinking and Char Backg off Not Blinking and Char Backg on Blinking and Char Backg off Blinking and Char Backg on CBACKG CCHAR CCHAR CHARACTER BORDER if on CBORD CBORD video video CBACKG CHARACTER BORDER if off CHARACTER PAGE BACKGROUND BACKGROUND video video
12.2 - Full Page Mode
CHARACTER FOREGROUND Not Blinking and Char Backg off Not Blinking and Char Backg on Blinking and Char Backg off Blinking and Char Backg on CCHAR CCHAR CHARACTER BORDER if on CBORD CBORD CHARACTER BORDER if off CHARACTER PAGE BACKGROUND BACKGROUND CSCREEN CBACKG CSCREEN CBACKG CSCREEN CSCREEN
CCHAR is a character attribute. C3 = 0 : CSCREEN, CBACKG and CBORD are page attributes, defined by the color register. C3 = 1 : CSCREEN is defined by the color register. CBACKG and CBORD are identical to CCHAR and thus are character attributes.
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STV5730A
FUNCTIONAL DESCRIPTION (continued) 13 - STANDARD CHARACTERS The default device is delivered with a standard set of ROM based characters (see Figure 6). The user can redefine the total character set (except for the character 00H (zero)). Figure 6
00H
01H
02H
03H
04H
05H
06H
07H
08H
09H
0AH
0BH
0CH
0DH
0EH
0FH
10H
11H
12H
13H
14H
15H
16H
17H
18H
19H
1AH
1BH
1CH
1DH
1EH
1FH
20H
21H
22H
23H
24H
25H
26H
27H
28H
29H
2AH
2BH
2CH
2DH
2EH
2FH
30H
31H
32H
33H
34H
35H
36H
37H
38H
39H
3AH
3BH
3CH
3DH
3EH
3FH
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5730A-12.EPS
STV5730A
FUNCTIONAL DESCRIPTION (continued) 13 - STANDARD CHARACTERS (continued) Figure 6 (continued)
40 H
41 H
42H
43 H
44H
45H
46H
47 H
48H
49H
4AH
4BH
4CH
4DH
4EH
4FH
50H
51H
52H
53H
54H
55H
56H
57H
58H
59H
5AH
5BH
5CH
5DH
5EH
5FH
60H
61H
62H
63H
64H
65H
66H
67H
68H
69H
6AH
6BH
6CH
6DH
6EH
6FH
70H
71H
72H
73H
74H
75H
76H
77H
78 H
79 H
7AH
7BH
7CH
7DH
7EH
7FH
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5730A-13.EPS
STV5730A
PACKAGE MECHANICAL DATA 28 PINS - PLASTIC MICROPACKAGE
Dimensions A a1 b b1 C c1 D E e e3 F L S
Min. 0.1 0.35 0.23
Millimeters Typ.
Max. 2.65 0.3 0.49 0.32 45 (Typ.)
o
Min. 0.004 0.014 0.009
Inches Typ.
Max. 0.104 0.012 0.019 0.013
0.5 17.7 10 1.27 16.51 7.4 0.4 7.6 1.27 8 (Max.)
o
0.020 18.1 10.65 0.697 0.394 0.050 0.65
SO28.TBL
0.713 0.419
0.291 0.016
0.299 0.050
Information furnished is believed to be accurate and reliable. However, SGS-THOMSON Microelectronics 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 licence is granted by implication or otherwise under any patent or patent rights of SGS-THOMSON Microelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. SGS-THOMSON Microelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of SGS-THOMSON Microelectronics. (c) 1996 SGS-THOMSON Microelectronics - All Rights Reserved Purchase of I2C Components of SGS-THOMSON Microelectronics, conveys a license under the Philips I2C Patent. Rights to use these components in a I2C system, is granted provided that the system conforms to the I2C Standard Specifications as defined by Philips. SGS-THOMSON Microelectronics GROUP OF COMPANIES Australia - Brazil - China - France - Germany - Hong Kong - Italy - Japan - Korea - Malaysia - Malta - Morocco The Netherlands - Singapore - Spain - Sweden - Switzerland - Taiwan - Thailand - United Kingdom - U.S.A.
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PM-SO28.EPS

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