Datasheet STV5730 Datasheet (SGS Thomson Microelectronics)

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Page 1

MULTISTANDARD ON-SCREEN DISPLAY

FOR VCR, PAY-TV, SATELLITE RECEIVER

A CHARACTER GENERATOR WITH ASCII RAMANDCHARACTER ROM :

- 128characters

- 12 dots x 18 lines charactercomposition

- 11rows x 28 characterspagecomposition

ACCURATE INTERNAL BANDGAP VOLTAGE REFERENCE

LINELOCKEDPLL

VIDEOTIMINGGENERATOR

INPUT CVBS CLAMP AND SYNC EXTRACTOR

VERTICALSYNCSEPARATOR

INPUTCVBS SYNC RE-INSERTION

INPUTCVBS PRESENCEDETECTOR

PAL/NTSCCHROMAENCODER

DEDICATED PINSFORLUMAANDCHROMA EXTERNALFILTERING

GAIN ON CVBS OUTPUT FOR EITHER 0dB OR 6dB CAPABILITY

MULTISTANDARD TRANSLUCENT MIXED MODE

OPAQUEMIXED MODE

NORMALFULL PAGEMODE

VIDEOFULLPAGE MODE

SUITABLEFORS-VHS

THREE DIFFERENT MARKERS CAN BE GENERATED SIMULTANEOUSLY

THREE WIRE SERIAL INTERFACE FOR MICROPROCESSORCONTROL

DESCRIPTION

The STV5730 IC is intended to be used in VCR, SatellitereceiverandPAY-TVsystemsfor CVBSor R/G/Btext/graphicsinsertion.

(Plastic Micropackage)

ORDER CODE : STV5730

PIN CONNECTIONS

YOUT

VIDEO IN

RES

FTR AV DV

CSYNC

XTAL IN

XTAL OUT

MUTE

DATA

CLK

CSN

1 2 3 4 5 6

7 8 9 10 11 12 13 14

SO28

STV5730

ADVANCE DATA

YIN

VIDEO OUT1

VIDEO OUT2

CIN

COUT

LESCREEN

LECHAR

AGND

DGND

BAR

5730-01.EPS

October 1994

This is advance informationon anewproduct now in developmentor undergoingevaluation. Detailsare subjectto changewithout notice.

1/19

Page 2

STV5730

PIN DESCRIPTION

1 YOUT Analog Output This pin outputs the luma to allow the user to notch filter it. This pin may be

2 VIDEO IN Analog Input This is the CVBS input. An external capacitor is needed for clamp operation.

3 RES Analog Pin it must be tied to an external resistor to control the PLL f0 frequency. 4 FTR Analog Pin it must be tied to the line PLL loop filter. 5AV 6DV 7 CSYNC Bidirectional

8 XTAL IN Digital Input This is the 4*fsc quartz input. The quartz may be started or stopped under

9 XTAL OUT Digital Output This is the 4*fsc quartz output. The quartz may be started or stopped under

10 MUTE Digital Output This pin indicates if the CVBS input signal is present on VIDEO IN input pin.

11 DATA Digital Input This is the serial interface data input. 12 CLK Digital Input This is the serial interface clock input. 13 CSN Digital Input This is the serial interface chip selectinput. 14 R Digital Output This is the Red signal output. It is forced low during the horizontal and vertical

15 G Digital Output This is the Green signal output. It is forced low during the horizontal and

16 B Digital Output This is the Blue signal output. It is forced low during the horizontal and vertical

17 FB Digital Output This is the fast blanking output. It is delivered to control an external R/G/B 18 CO Digital Output This is the character activity output. It indicates ifa character foreground is

19 BAR Digital Input This input forces the PLL in free run mode when active. It is enabled ifthe M0 20 DGND Supply Pin 0V digital ground.

21 AGND Supply Pin 0V analog ground. 22 LECHAR Analog Input This pin determines the character intensity level in external bias mode (ie

23 LESCREEN Analog Input This pin determines the screen intensity level in external bias mode (ie when

24 COUT Analog Output This pin outputs the full page mode chromafor external filtering (and

25 CIN Analog Input This pin inputs the filtered chroma. 26 VIDEO OUT2 Analog Output If the M7 mode bit is cleared : this pin is a CVBS output that delivers the

27 VIDEO OUT1 Analog Output This is a CVBS output. It delivers the VIDEO IN + text in mixed mode and the

28 YIN Analog Input This pin inputs the notch filtered luma.

Name Type Description

connected to the YIN input for minimum cost applications.

The STV5730 extracts the sync from this signal when the C7 control bit is set.

DD DD

Supply Pin 5V analog supply pin. Supply Pin 5V digital supply pin.

This pin inputs the mixed mode composite sync when the C7 control bit is

cleared. It outputs the video in extracted sync when the C7 control bit is set.

control of dedicated serial interface messages. Alternatively, a 4fsc clock can be input directly. The stop message must not be used in this case.

control of dedicated serial interface messages.

It is forced low if the M2 mode bit is cleared.

blanking intervals. vertical blanking intervals.

blanking intervals.

switch for R/G/B or TV applications.

being displayed, and can be used to control its intensity.

mode bit is set.

when the C10 control bit is set). This level mustbe defined relative to the internal black reference. A variable luminance signal may be entered. To be grounded if not used.

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.

attenuationif necessary). This pin may be connected to CIN for minimum cost applications.

VIDEO IN signal. The sync is re-inserted if the M4 mode bit is set. The output amplitude may be either 0dBor +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.

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.

5730-01.TBL

2/19

Page 3

BLOCK DIAGRAM

STV5730

VIDEO

CSYNC

BAR

DV AGND DGND

CLAMP

5 6

LINE LOCKED

COMPOSITE

SYNC

EXTRACTION

PLL

YIN CIN

28 25

SYNC

INSERTION

VERTICAL

SYNC

SEPARATION

PLXCLK

CONTROL

SERIAL BUS

INTERFACE

11 1312 1043

INSERTION

H AND V

SCANNING

VIDEO

DETECTOR

MUTECSNCLKDATARESFTR

TEXT

GENERATOR

ASCII

RAM

ADDRESS

GAIN

DISABLE

CHARACTER

ROM

LUMA & SYNC GENERATION

BIAS LEVEL

GENERATION

PAL/NTSC

ENCODER &

SATURATION

COLOR

LOGIC

STV5730

VIDEO

OUT1

VIDEO

OUT2

XTAL

IN XTAL

OUT COUT

B FB

17 18

CO YOUT

LECHAR

LESCREEN

5730-02.EPS

ABSOLUTE MAXIMUMRATINGS

Symbol Parameter Value Unit

DV AV

DD DD

Digital Supply Voltage 7 V Analog Supply Voltage 7 V Junction Temperature 150

THERMALDATA

Symbol Parameter Value Unit

th (j-a)

Junction-ambient Thermal Resistance Typ. 70

C/W

3/19

5730-02.TBL

5730-03.TBL

Page 4

STV5730

ELECTRICAL CHARACTERISTICS (TA=0oCto70oC,AVDD=DVDD=5V,unless otherwisespecified)

Symbol Parameter Min. Typ. Max. Unit

-DVDDAnalog to Digital Supply Voltage Difference -200 0 200 mV

BW Bandwidth at pins : VIDEO IN, VIDEO OUT1,

VIDEO IN (Pin 2)

SYNCIN

VIDEO OUT1(Pin 27)

OUT1

VIDEO OUT2(Pin 26)

OUT2

GAIN (Pins 26- 27)

CIN (Pin 25)

CIN

YIN (Pin 28)

YIN

YOUT (Pin 1)

YOUT

LYOUT

COUT (Pin 24)

COUT

LCOUT

Digital Supply Voltage DVDD- DGND 4.75 5.0 5.25 V Digital Supply Current 10 mA Analog Supply Voltage 4.75 5.0 5.25 V Analog Supply Current 25 mA

Digital Output Voltage High Level (I Digital Output Voltage Low Level (I

Digital Input Voltage High Level 0.75 x

Digital Input Voltage Low Level 0.15 x

= -1mA) DVDD-0.5 V

LOAD

= +1mA) DGND + 0.5 V

LOAD

- DGND)

(DV

Digital Input Current High Level 1 Digital Input Current Low Level -1 µ

8.0 MHz

VIDEO OUT2, CIN, YIN, YOUT, COUT

Sync Pulse Range 100 650 mV Clamp Voltage 1.10 1.25 1.4 V External Capacitor 2.2 µ

Output Dynamic Range 2.0 4.4 V Black Level Voltage 2.6 2.85 3.1 V Output Capacitor Load 20 pF Output Resistor Load 10 Output Impedance 250 Ω

Gain Dispersion 0dB

6dB

-1 5

0 6

Input Capacitance 0.5 pF Input Resistance 50

Input Capacitance 0.5 pF

Output Dynamic Range 0.5 3.5 V Output Capacitor Load 15 pF Output Resistor Load 10

- DGND)

µA

kΩ

dB dB

kΩ

5730-04.TBL

4/19

Page 5

STV5730

ELECTRICAL CHARACTERISTICS (TA=0oCto70oC,AVDD=DVDD=5V,unless otherwisespecified)

(continued)

Symbol Parameter Min. Typ. Max. Unit

LESCREEN (Pin 23)

LESCR

LECHAR (Pin 22)

LECH

INTERNAL SIGNAL LEVELS (Pins 1- 24)

SYNC

BLACK

SCREEN

CHAR

∆V1 ∆V2 ∆V3

BURSTPP

CH1PP

CH2PP

BUS (Pins 11- 12 - 13)

CLK

CWL

CWH

CSWL

CSWH

DCLH

CLD

CLCSL

CSLCLL

CLHCSH

CSHCL

* maxHZ is the maximum horizontal zoom factor that isused

InputLevel 1.0 3.0 V

Internal Sync Level 0.95 V Internal Black Level 1.1 1.25 1.4 V Internal LESCREEN 1.4 V Internal LECHAR 1.8 V Difference Level between Black and Sync Level 250 300 350 mV Difference Level between Screen and Black Level 100 150 200 mV

Difference Level between Char. and Screen Level 360 410 460 mV Burst Amplitude 360 mV Chroma Amplitude for blue or yellow colors

for red, magenta, green or cyan colors

360 520

mV mV

CLK Frequency Range 0 2 MHz CLK Width Low 200 ns CLK Width High 200 ns CSN Width Low maxHZ* x 4 CSN Width High maxHZ* x 4 µ

µs

s DATA Valid to CLK High 100 ns CLK High to DATA Unvalid 100 ns CLK Valid to CSN Low 100 ns CSN Low to CLK Low 100 ns CLK High to CSN High 100 ns CSN High to CLK Unvalid 100 ns

PP PP

5730-05.TBL

Figure1

DATA

CLK

CLCSL

CSN

DCLH

CSLCLL

CLD

CSHCL

CWL

CSWL

CWH

CLHCSH

CSWH

CLCSL

5730-03.EPS

5/19

Page 6

STV5730

TYPICAL PAL/NTSC/SECAM APPLICATION

LUMA FILTER (see Note 1)

CVBS IN

(seenote 4)

Ω

4.3k

220pF

CSYNC

(IN or OUT)

Ext. 4 fsc

OSC IN

(see Note 2)

TO MICRO

22kΩ

+5V

22nF

XTAL

x 4fsc

2.2µF

10µH

220nF

39pF

BAT42

220nF

1 2 3 4 5 6 7 8 9

10 11 12 13 14 15

5 7 3 0

TRANSLUCENTMODE

+5V

68Ω

CVBS OUT

28 27 26 25 24 23 22 21 20 19 18 17 16

+5V

CHROMA TRAP

(see Note 3)

68Ω

+5V

Ω

180

+5V +5V

180Ω

CHROMA BP FILTER

(see Note 1)

68Ω

+5V

180Ω

68Ω

+5V

180Ω

EXTERNAL RGB TEXT INSERTION (SCART)

68Ω

Digital Ground

AnalogGround

Notes : 1. Optional filter.For low cost applications, short circuit.

2. The 4fsc (17.734MHz PAL,14.318MHz NTSC) crystal may be ommited if this signal is already available in a system.

3. External bias level can be setby resistor ratioas required. The level at pinsLECHAR and LESCREEN must not exceed 3.0 Vdc.

180Ω

4. Output impedance of the driving stage should be less than 300Ω.

6/19

5730-04.EPS

Page 7

FUNCTIONALDESCRIPTION

The STV5730 operates in ”mixed mode” or ”full page mode” :

- Mixed mode : the device is line locked to the incomingCVBS signal.The textissuperimposed overtheCVBSinputeitherin B&Wortranslucent. Itmayalsobesuperimposedin colorby usingthe R/G/B outputs.

- Full pagemode:the device generatesa colored PAL or NTSC CVBS output and simultaneous R/G/Boutputs.Both”normalfullpage”and”video full page”modesare supportedby the STV5730. In the ”normal full page”the screen background is uniformely colored, while the ”video full page” mode permits todisplay the unlocked VIDEO IN signalin the screenbackgroundarea.

It performsthe followingtextfeatures:

- Page composition: 11rows X28 characters

- Number of displayedcharacters: 308(max)

- Character composition:12 dots X 18 lines

STV5730

- ROMcharacterset: 128userdefinabl echarac ters

- Screendisplaypositions:58 horizontalpositions, 63 verticalpositions

- Rowpositionoffset , each row : Xoffsetfrom0 to +15,Yoffsetfrom -17 to +17

- Display enable : each row or page

- Charactercolor : 1 outof 8, each character

- Characterbackgroundcolor:1outof8,character and page enabled or set identical to character color

- Characterbordercolor : 1 outof 8,row enabled or set identicalto character color

- Pagebackgroundcolor : 1 out of 8

- Zoom:3 independantzoomfactorsfor rows0, 1 to 9 and10.

- Zoom factors : four independantX and Y zoom factors

- Blink: characterand page enabled

- Blinkfrequency : 0.5 or 1.0 second

- Blinkduty cycle : 0.25,0.5 or 0.75

1 - THE INTERNAL RAM BUFFER

It storesthe page (i.e. the text definition)andthe row attributes.

1.1 - Page

The page includes 11 row buffers, numbered from 0 to 10. Each row buffer includes 28 characters, numberedfrom0to27. Thecharactersmaybewrittenonebyonebythemicroprocessorforrandomaccess. They also may be writtensequentially, startingwith any character address.

1.2 - Character Formatand Attributes

11 10 9 8 7 6 0

BE R G B BK CHARACTER CODE

CHARACTER CODE : 1 characterout of 128 from the characterROM BK : BK=0 : characterblink disabled

BK=1 : characterblink enabled

R/G/B : Charactercolor :

BE : BE=0 :

BE=1 :

000 001 010 011 100 101 110 111

the character backgroundis disabled

thecharacterbackground is enabled

black blue green cyan red magenta yellow white

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Page 8

STV5730

1.3 - Row Attributes

Thereare 11row attributes,numberedfrom0 to10. They may be written one by one or sequentially. The row attribute formatis as follows :

11 8765 0

HPOS OFFSET RE FBE VPOS OFFSET

VPOS OFFSET : theMSBisthesign bit (0 : positive,1 :negative).Ifthe offsetis 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 offsetis negative (from -1 to -17), then the correspondingnumber of lines are subtractedfromthe display of the row.

FBE : FBE=0 : the charactersare displayedwithout border

FBE=1: the characters are displayed with border

RE : RE=0 :

RE=1 :

HPOSOFFSET : The displayoftherowisshifted totherightbythe correspondingnumberof pixels(from

0 to15).

1.4 - The Control Registers

Thereare 5 registers formicroprocessor control.They can be writtenindividuallyorsequentially:

- the ZOOM register address : 12

- the COLOR register 13

- the CONTROLregister 14

- the POSITIONregister 15

- the MODE register 16

the characters of the roware not displayed. They are replacedby the page backgroundcolor. the characters of the roware displayed.

1.4.1 - Zoom Register

11109876543210

VZb1 VZb0 HZb1 HZb0 VZm1 VZm0 HZm1 HZm0 VZt1 VZt0 HZt1 HZt0

HZt[1:0] : Top row horizontalzoomfactor(ierow 0)

HZt[1:0] = 00

1 pixel per character dot

2 pixelsper characterdot

3 pixelsper characterdot

4 pixelsper characterdot

VZt[1:0] : Top row vertical zoom factor

VZt[1:0] = 00

1 pixel per character line

2 pixelsper characterline

3 pixelsper characterline

4 pixelsper characterline HZm[1:0] : Same as HZt[1:0],for middlerows (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 bottomrow (ie row 10) VZb[1:0] : Same as VZt[1:0],for bottom row

The outputofthisregister is synchronizedby the horizontalsynchronism.TheRESETmessage clearsthis register.

8/19

Page 9

STV5730

1.4.2 - Color Register (pageattributes)

11109876 210

R G B R G B // // // R G B

SBC FBC BCC

SBC : screenbackgroundcolor FBC : character bordercolor BCC : characterbackgroundcolor

The output of this register is synchronizedby the horizontalsynchronism.

1.4.3 - Control Register

11109876543210

C11 C10 C9 C8 C7 C6 C5 C4 C3 C2 C1 C0

C0 : C0 = 0 :mixed mode

C0 = 1 : full page mode

C1 : C1 = 0 :the character backgroundis controlledby BE (seecharacterword description)

C1 = 1 : all displayed character backgroundsare disabled

C2 : C2 = 0 :display off

C2 = 1 : display on

C3 : C3 = 0 :the charactersare coloredaccordingto the character attributeand the color register

values(i.e. CBACKGand CBORD)

C3 = 1 : the character foreground,borderandbackgroundcolorsare all set to the character

attributevalue (see paragraph1.2).This option is mainlyintendedforfull page mode, CVBSor Y/Coutput

C4 : C4 = 0 :1.0 second blinking period

C4 = 1 : 0.5 second blinking period

C[6:5] : C[6:5] = 00

C7 : C7 = 0

C7 = 1

an external input compositesync is taken from the CSYNC pin the sync is extracted by the STV5730.The currently active sync is output on the CSYNCpin

C8 : C8 = 0 :the standardis NTSC, 60Hz

C8 = 1 : the standardis PALor SECAMwith M6 = 0, 50Hz

C9 : C9 = 0 :character color encodingis disabled

C9 = 1 : character color encodingis enabled

C10 : C10 = 0 : the luminancelevelsare generatedinternally

C10 = 1 : the luminance levels are providedbythe LESCREENand LECHARinput pins.

C11 : C11= 0 : VideoFull Page Mode. A stable full page mode text is displayed while the screen

C11= 1 : Normalfull pagemode is active.

The outputofthisregisteris synchronizedbythehorizontalsync (exceptC7).The RESETmessageclears this register.

blinkingoff

0.75 blinking duty cycle

0.5 blinking duty cycle

0.25 blinking duty cycle

background is the unlocked video input signal.

9/19

Page 10

STV5730

1.4.4 - Position Register

11 6 5 0

VERTICAL POSITION HORIZONTAL POSITION

HORIZONTALPOSITION Anyvaluefrom 6 to 63 VERTICALPOSITION Any value from 1 to63

1.4.5 - Mode Register

11109876543210

M11 M10 M9 M8 M7 M6 M5 M4 M3 M2 M1 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::

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 deliverstheinternalMUTEsignal

the MUTE time constant is 8 lines the MUTE time constant is 32 lines

the sync is not re-inserted the sync is re-insertedforimprovedtext 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 (PALor NTSC) the color encoder is disabled(B&W or SECAM)

the VIDEOOUT2 pin outputs the VIDEOIN signal the VIDEOOUT2 pin outputs the composite sync

the VIDEOOUT2 pin is in high impedancestate

the VIDEOOUT2 pin is in low impedancestate M9 : This Mode bit has to be keptat a lowlevel. M10 : M10 = 0

M10 = 1::

M11 : M11=0

M11 = 1::

No delaycompensation

It enables the delay compensationof the internalsync extractor.

The mute signal output is synchronizedon vertical sync in order to limit its transitions.

The mute signal is not synchronized on vertical sync thus accelerating the VIDEO IN

presencedetection(useful in full page mode).

2 - THE MICROPROCESSOR SERIALINTERFACE

The STV5730 is down loaded by the microprocessor through a three wire serial interface : DATA, CLK, CSN. TheCLK andCSNsignalsareinternallyORed in order to validate the transferwhenthe STV5730 is chipselectedonly(i.e. CSN = 0). The CSN rising edge validates theinternal data transfer.

2.1 - MessageFormats (seeFigure2) 16-bit,8-bit and 0-bit formats are available. The 8-bit and 0-bit message formatsmay be useful to speed up the STV5730 down loading.

15 1211 87654 0

0000 BUF[11:8] STRU[7:6] 0 DEPL[4:0] ADDRESS

This16-bitaddressmessageloads theserial interfacewritepointer.This addressisincrementedaftereach data message.

15 12 11 0

0001 DATA[11:0] DATA

This 16-bitdata messagewrites the data at the location indicatedby the write pointer.

10/19

Page 11

STV5730

DATA[7:0] DATA

This 8-bit data messagewrites the data at thelocationindicatedby the write pointer. The 4-bit data MSB is copied from thelastprevious16-bitdata message. The 0-bit data message writes a dataat the location indicated by the write pointer.The lastdata is used fromthe previous8-bit or 16-bit data message.

15 12 11 0

0010 don’t care CONTROL

This 16-bitcontrol message stopsthe 4*fsc quartz oscillator.

15 12 11 0

0011 don’t care CONTROL

This 16-bit control message resets the circuit and starts the 4*fsc quartz oscillator. This message should not be usedif an external4 x fsc clockis used instead of the quartz.Itis mandatorythatreset operationis as describedin paragraph2.3.

Figure 2

15 14 13 12 2 1 0

DATA

CLK

CSN

76543210

DATA

CLK

CSN

DATA

CLK

CSN

2.2 - The Write Pointer

As describedin the ”message format” paragraph, an address consists of three fields : STRU[7:6], BUF[11:8],DEPL[4:0]. The STRU[7:6] fieldindicateswhether it is a PAGE address or a ROW ATTRIBUTE / REGISTERaddress. It also determines the address incrementationscheme.

- STRU[7:6] = 00:

It is a PAGE address. BUF provides the row number (from 0 to 10) and DEPL provides the characternumber (from 0 to 27). DEPLis incre-

16-BIT

MESSAGE

8-BIT

MESSAGE

0-BIT

MESSAGE

mentedaftereachdatamessage.Whenthe write of a row is completed, the write pointeris automaticallysetto the next row first character.

- STRU[7:6] = 01 : It is also a PAGE address buttheincrementation schemeisa bit different: whenthewrite of arow iscompleted,thewritepointerisautomaticallyset to the first characterof the same row.

- STRU[7:6] = 11 : Itis arowattributeoraregisteraddress.TheBUF field must be set to 0000 and the DEPL field is incrementedafter eachdata access.

5730-05.EPS

11/19

Page 12

STV5730

2.2.1 - Address Map

PAGE : ROW0 : STRU[7:6] = 0 or 1 -BUF[11:8] = 0 - DEPL[4:0]from 0 to 27

ROW1 : STRU[7:6] = 0 or 1 - BUF[11:8]= 1 - DEPL[4:0]from0 to 27

......... : ................. ..................... ................

ROW10 : STRU[7:6]= 0 or 1 - BUF[11:8]= 10 - DEPL[3:0]from0 t0 27 ROWATTRIBUTES : 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 POSITIONregister, 16 for MODE register

2.3 - Initializationand Down-loadingSequence

It is important that the STV5730is correctly reset and initialized after the circuit is powered prior to anywriting. This routine is shownin Figure 3. The two initializationbytes (00db 1000) must procede theresetinstruction(x2)everytimeitistransmitted.

Figure3

RESET & INITIALIZE

3000H 3000H 00dbH 1000H

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.

Write

STOP

bytheSTV5730(if C7controlbit isset)orprovided by the application in a composite form on the CSYNC pin (if C7 control bit is cleared). The STV5730separatestheverticalsync fromthecomposite synchronism. The STV5730 PLL features built-in protection mechanismsagainstmissingandparasitichorizontal sync pulses. These mechanisms are activated once the loop is locked. The STV5730 PLL is also insensitive to the head switching disturbing the synchronism in the VTR applications(playback). Themissingpulsesmaybe detected.The M1mode bitenables the detection.

In addition, the BAR input pin is available to enter a signal that forces the PLL in free run mode.This capabilitymay be used for search mode in VTRs, to improve the loop robustness against the noise bar.The BAR inputis enabledby the M0 mode bit.

3.2 - Horizontal SyncRe-insertion

This mechanism is of interest in mixed mode, to cancelthetexthorizontaljitterwhenthesyncsignal 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 parasiticsyncinsertion.Themodifiedsyncisactive on all output pins (ie CSYNC if C7 is set, VIDEO OUT1,VIDEO OUT2).

Ajitter greaterthan 0.42useccannotbecancelled. Anease useof thesynchronismre-insertion capa-

bilityis to have it always active in mixed mode.

3.3 - FullPage Mode Behavior

Inthiscase,thePLLislockedon aninternal64usec referencederived from the 4*fsc quartz.

TheSTV5730generatesa noninterlace output.

5730-14.EPS

3 - THE LINE LOCKEDPLL

The PLLfrequencyis 504* f

= 7.875MHz.

3.1 - Mixed Mode Behavior

In mixedmode,theinternalPLLisline lockedto the incomingCVBSsignal.Thesynciseither extracted

12/19

4 - MUTE

The STV5730 monitors the sync to determine whetherit is a stable signal or not.

MUTE = high : no stable signal MUTE = low : stable CVBS input signal

Page 13

STV5730

The MUTE search time constant may be either 8 linesor 32 lines,accordingto theM3 modebit. The signal thatisdelivered to the MUTEoutputpin is synchronized on the vertical sync if M11 is cleared. It is forced low if the M2 mode bit is low. This signalmay be monitoredby the microprocessor to switchtheSTV5730frommixed mode to full page mode and vice versa (using the C0 control bit).

5 - THE LUMA GENERATION

Thelumasignalis generatedbytheSTV5730from timing information created by the character and video timinggeneratorsand voltagelevelscreated by the internalbias level generator or enteredon the LESCREENandLECHAR pins(as selectedby the C10 control bit). The luma signalisoutputon the YOUTpintoallow the user to notch filter it. It is then re-input on the YINpin.YOUT andYINmaybeconnectedtogether forminimalcost applications.

5.1 - InternalBiasMode

This mode is intended for minimal cost applications. C10 mustbe cleared. The luma levels of the OSDoutput signal are as follows :

- LEBLACK : black level

nominalvalue: 1.25V± 20mV

- LESYNC : sync level

nominalvalue: LEBLACK- 300mV

- LESCREEN : page background level

nominalvalue: LEBLACK+ 150mV

- LECHAR : character level

nominalvalue: LEBLACK+ 550mV

LEBLACK is also used to clamp the VIDEO IN signaland to create the characterborder.

The character encoding is controlled by the C9 controlbit. The chroma signal is output on the COUT pin for externalfiltering and for attenuationif necessary.It isthen re-enteredontheCIN pin and addedto the YIN pin signal to create the final CVBS output signal.

The chro ma saturation is controlled by the STV5730:

- burst nominal amplitude : 360mV

- blu e or yellow colors nominal amplitude : 360mV

- red, magenta, green or cyan colors nominal amplitude : 520mV

7 - THE MARKERS

TheSTV5730cangenerate3differentmarkersthat canbe activatedsimultaneously (i.e. on the same page).

Thefollowingmarkerfeaturesare performed:

- Blinking character,character backgroundoff. Thecharacterforegroundblinks (BK = 1, BE = 0 or C1 = 1).

- Not blinkingcharacter, characterbackgroundon (C1 = 0, BE = 1).

- Blinking character,character backgroundon. Thecharacterforegroundblinks andthe characterbackgroundremains(BK = 1, BE=1,C1 =0).

8 - THE TRANSLUCENT MIXED MODE Figure4 : The Translucent Mixed Mode Output

Configuration

VIDEO OUT1

5.2 - ExternalBias Mode

This modeisintendedto givemoreflexibility tothe 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 staticor dynamic. Dynamic levels can be easily generated by analog sum ofthe R/G/B andCOSTV5730outputs(a few resistors are necessary)to givegreyscale character shading in the mixed mode. C0 is useful to controlthe characterforegroundluma level.

6 - THE CHROMAGENERATION

The STV5730 encoder is operates in full page modeonly. It may perform PALor NTSC encoding accordingtothe C8control bit. A 4* fsc chroma quartz crystal is necessary (fsc = 4.43MHz for PAL,3.58MHzfor NTSC). The encoder can be turned off by the M6 mode bit forblack & whiteor forSECAMapplications.

disable

VIDEO OUT2

STV5730

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 backgroundpicture is still visible behind the text. The background picture visibility (or level oftranslucenceis controlledby the resistorratio. Another benefit from this function is to allow PAL/SECAM/NTSC multistandard applications to

13/19

5730-06.EPS

Page 14

STV5730

be builtwith no SECAM chroma re-insertion filter and no additional control switches. ThesummaybecancelledbysettingtheM8 mode bit. In this case, the VIDEO OUT2 pin is in high impedancestateand the resistor network delivers VIDEOOUT1 only.

Whenusing the resistor network, please set M8 in the followingcases:

- in full page mode

- when OSD in not displayed

- to select opaque text. This allows the viewer to selectby software the preferreddisplaymode.

The DC levels of theVIDEO OUT1, VIDEO OUT2 and the sum signals are high enough to directly drivea NPN emitter follower driver (see Table 1).

without colored background. Presence detectionis permanently active to keep the microcontroller informed of the input signal quality. The information is delivered by the MUTE pin. Thisinformationcanbeused bythemicrocontroller to forcetheSTV5730 into the mixed mode (set C0 low) when the input signal becomes goodenough. In thevideo full page mode, it can be usefull to set the M11(mode register)bit high, so that the mute signalis notsynchronizedonthe verticalsync,thus acceleratingtheVIDEOINpresencedetection.

10 - S-VHS APPLICATION (see Figure 5) The STV5730 can be used in S-VHS applications

easily. The Y signal must be delivered to the VIDEO IN

9 - VIDEO FULLPAGE MODE

In additionto the normal fullpage mode in whicha uniformely colored screen background is generated, the STV5730 is able to support a ”video full page mode”. Normal and videofull page mode are selected by the controlbit 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

input. The VIDEO OUT1 output then delivers a Y +textsignal,whilsttheVIDEOOUT2deliversthe Y input signal, provided that the CIN input is connectedto a bias DC level. An external switch must be used to select the C signalin mixed mode or the COUToutputsignalin full page mode. In mixedmodethechromasignal (C) canbeexternally attenuated(multistandardtranslucentoperation) or killed (PAL/NTSC opaque operationonly) during the character gate controlled by the fast blankingsignal.

Table 1

FULL PAGE

PAL/NTSC

VIDEO OUT1 CVBS (OSD) VIDEO IN or Text VIDEO IN or Text VIDEO OUT2 High impedance VIDEO IN High Impedance

S CVBS

(OSD)

TRANSLUCENT PAL/NTSC/SECAM OPAQUE PAL/NTSC

VIDEO IN or

x Text + R1x VIDEO IN

+ R

MIXED MODE

VIDEO IN

or Text

Figure5 : S-VHS Input/OutputConfiguration

STV5730

COUTFP2223

INTERNAL BIAS

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VIDEO IN VIDEOOUT1

VIDEOOUT2

CIN

CHARACTER

GATED

ATTENUATOR

OPTIONAL

FILTER

OSD

Y or Text

Text

Yor

EXTERNAL

SWITCH

Mixed Mode (MM) Full PageMode (FP)

Full page mode

Opaquemixed mode

Translucent mixedmode

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STV5730

11- THE CVBS OUTPUT PICTURE

The following tables show the picture design in CVBS output mode (VIDEOout1 analog output pin) accordingto:

- Blink on/off (BKcharacterattribute & C[6:5] control bits)

- Character backgroundon/off(BE characterattribute& 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 video Blinking and Char Backg on LESCREEN video

LECHAR LEBLACK video

LECHAR LEBLACK LESCREEN 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 LESCREEN + CSCREEN Blinking and Char Backg on LESCREEN + CBACKG LESCREEN +

LECHAR +

CCHAR

LECHAR +

CCHAR

CCHARis a characterattribute. C3 = 0 : CSCREEN,CBACKG and CBORD are page attributes,definedby the color register. C3 = 1 : CSCREENis defined by the colorregister. CBACKGand CBORD are identical to CCHAR and

thus are characterattributes.

CHARACTER

BORDER

if on

CHARACTER

BORDER

if on

LEBLACK +

CBORD

LEBLACK +

CBORD

CHARACTER

BORDER

if off

CHARACTER

BORDER

if off

LESCREEN + CBACKG LESCREEN +

CHARACTER

BACKGROUND

CHARACTER

BACKGROUND

LESCREEN + CSCREEN

BACKGROUND

CSCREEN

PAGE

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Page 16

STV5730

12 - THE R/G/B OUTPUT PICTURE

The followingtablesshow the picture design in R/G/B outputmode,accordingto :

- Blink on/off (BKcharacterattribute & C[6:4] control bits)

- Character backgroundon/off(BE characterattribute& C1 control bit)

- Character border on/off (FBE row attribute)

- C3 = 0 : CSCREEN,CBACKG and CBORDare page attributes,definedby the color register.

- C3 = 1 : CSCREENisdefinedby the colorregister.CBACKGand CBORDareidenticalto CCHARand

thus are characterattributes.Itis recommendedto useCO output signal in this case.

AR/G/Bexternalswitch must be controlledby the STV5730 FB output to perform the characterinsertion. C0 may be used as an additionalcharacterintensitysignal.

12.1 - Mixed Mode

CHARACTER

FOREGROUND

Not Blinking and Char Backg off

Not Blinking and Char Backg on

Blinking and Char Backg off video Blinking and Char Backg on CBACKG video

CCHAR CBORD video

CCHAR CBORD CBACKG 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 CSCREEN Blinking and Char Backg on CBACKG CSCREEN

CCHAR CBORD CSCREEN

CCHAR CBORD CBACKG CSCREEN

thus are characterattributes.

CHARACTER

BORDER

if on

CHARACTER

BORDER

if on

CHARACTER

BORDER

if off

CHARACTER

BORDER

if off

CHARACTER

BACKGROUND

CHARACTER

BACKGROUND

PAGE

BACKGROUND

PAGE

BACKGROUND

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STV5730

13 - STANDARD CHARACTERS

The default device is delivered with a standard set of ROM based characters(see Figure 6) and masked pin polarities.

The user can redefine the total character set (except for the character 0 (zero)).

Figure6

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

5730-12.EPS

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Page 18

STV5730

Figure 6 (continued)

40H 41H 42H 43H 44H 45H 46H 47H

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

78H 79H 7AH 7BH 7CH 7DH 7EH 7FH

5730-13.EPS

18/19

Page 19

PACKAGE MECHANICAL DATA

28 PINS - PLASTICMICROPACKAGE

STV5730

Dimensions

28 15

114

Millimeters Inches

Min. Typ. Max. Min. Typ. Max.

A 2.65 0.104

a1 0.1 0.3 0.004 0.012

b 0.35 0.49 0.014 0.019

b1 0.23 0.32 0.009 0.013

C 0.5 0.020

c1 45

(typ.) D 17.7 18.1 0.697 0.713 E 10 10.65 0.394 0.419

e 1.27 0.050

e3 16.51 0.65

F 7.4 7.6 0.291 0.299

L 0.4 1.27 0.016 0.050

(max.)

PM-SO28.EPS

SO28.TBL

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C Components of SGS-THOMSON Microelectronics, conveys a license under the Philips

the I

C Standard Specifications as defined by Philips.

SGS-THOMSON Microelectronics GROUP OF COMPANIES

19/19