Datasheet STV5730A 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 RAMAND CHARACTER ROM :

- 128characters

- 12 dots x 18lines character composition

- 11 rows x 28 characters pagecomposition

ACCURATE INTERNAL BANDGAP VOLTAGE REFERENCE

LINE LOCKEDPLL

VIDEOTIMING GENERATOR

INPUT CVBS CLAMP AND SYNC EXTRACTOR

VERTICALSYNCSEPARATOR

INPUTCVBS SYNC RE-INSERTION

INPUTCVBS PRESENCEDETECTOR

PAL/NTSCCHROMAENCODER

DEDICATEDPINS FOR LUMAAND CHROMA EXTERNALFILTERING

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

MULTISTANDARD TRANSLUCENT MIXED MODE

OPAQUEMIXED MODE

NORMALFULLPAGEMODE

VIDEOFULL PAGE MODE

SUITABLEFOR S-VHS

THREE DIFFERENT MARKERS CAN BE GENERATEDSIMULTANEOUSLY

THREE WIRE SERIAL INTERFACE FOR MICROPROCESSORCONTROL

DESCRIPTION

The STV5730AIC is intendedto be used in VCR, Satellitereceiver andPAY-TV systemsfor CVBS or R/G/Btext/graphicsinsertion.

(Plastic Micropackage)

ORDER CODE :STV5730A

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

STV5730A

SO28

YIN

VIDEO OUT1

VIDEO OUT2

CIN

COUT

LESCREEN

LECHAR

AGND

DGND

BAR

5730A-01.EPS

February 1996

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Page 2

STV5730A

PIN DESCRIPTION

1 YOUT Analog Output This pin outputs the lumato allowthe 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 itmust be tied to the line PLL loop filter. 5AV 6DV 7 CSYNC Bidirectional

8 XTAL IN DigitalInput 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 DigitalOutput 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 DigitalInput This is the serial interface clock input. 13 CSN Digital Input This is the serial interface chip select input. 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 if a character foreground is

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

21 AGND Supply Pin 0V analog ground. 22 LECHAR Analog Input This pin determines the characterintensity 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 pinoutputs the fullpage mode chroma for external filtering (and

25 CIN Analog Input This pin inputs the filtered chroma. 26 VIDEO OUT2 Analog Output If the M7 mode bitis 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 STV5730A extracts the sync from this signal when the C7 controlbit 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.

blankingintervals.

vertical blanking intervals. blankingintervals.

switch for R/G/B or TV applications.

beingdisplayed, andcan be used to control its intensity. mode bit is set.

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.

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 0dB or +6dB according to the M5 mode bit. If the M7 mode bit is set : It outputs the currently active synchronism. The signalamplitude 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 6dBaccording to the M5 mode bit. The sync is re inserted if the M4 mode bit isset.

5730A-01.TBL

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Page 3

BLOCK DIAGRAM

STV5730A

VIDEO

CLAMP

6 21 20

LINE LOCKED

CS YNC

BAR

DV AGND DGND

COMPOSITE

SYNC

EXTRACTION

PLL

YIN CIN

28 25

SYNC

INSERTION

VERTICAL

SYNC

SEPARATION

PLXCLK

CONTROL

SERIALBUS

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

STV5730A

VIDEO

OUT1

VIDEO

OUT2

XTAL

IN XTAL

OUT COUT

G B

YOUT

LECHAR

LESCREEN

5730A-02.EPS

ABSOLUTEMAXIMUMRATINGS

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

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5730A-02.TBL

5730A-03.TBL

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STV5730A

ELECTRICAL CHARACTERISTICS (TA=0oCto 70oC, 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 µA Digital Input Current Low Level -1 µA

8.0 MHz

VIDEO OUT2, CIN, YIN, YOUT, COUT

Sync Pulse Range 100 650 mV Clamp Voltage 1.10 1.30 1.50 V External Capacitor 2.2 µF

Output Dynamic Range 2.0 4.4 V Black Level Voltage 2.20 2.45 2.70 V Output Capacitor Load 20 pF Output Resistor Load 10 kΩ Output Impedance 250 Ω

Gain Dispersion 0dB

6dB

-1 5

0 6

Input Capacitance 0.5 pF Input Resistance 50 kΩ

Input Capacitance 0.5 pF

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

- DGND)

dB dB

5730A-04.TBL

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STV5730A

ELECTRICAL CHARACTERISTICS

=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 Difference Level between Black and Sync Level 250 300 350 mV ∆V2 Difference Level between Screen and Black Level 100 150 200 mV ∆V3 Difference Level between Char. and Screen Level 450 515 580 mV

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 is used

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 1.9 V

Burst Amplitude 320 mV Chroma Amplitude for blue or yellow colors

for red, magenta, green or cyan colors

420 580

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

mV mV

PP PP

5730A-05.TBL

Figure1

DATA

CLK

CLCSL

CSN

DCLH

CSLCLL

CLD

CSHCL

CWL

CSWL

CWH

CLHCSH

CSWH

CLCSL

5730A-03.EPS

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STV5730A

TYPICAL PAL/NTSC/SECAM APPLICATION

CVBS OUT

Ω

180

+5V

(see Note 1)

CHROMA BP FILTER

EXTERNAL

RGB

TEXT

INSERTION

Ω

(SCART)

+5V

Ω

180

+5V

Ω

180

68Ω

(see Note 3)

+5V

Ω

180

CHROMA TRAP

220nF

+5V

39pF

Ω

180

39pF

TRANSLUCENT MODE

573

220nF

STV

LUMAFILTER (see Note 1)

2.2

Ω

4.3k

CVBS IN

(see note 4)

220pF

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 set by resistor ratio as required. The level atpins LECHAR and LESCREENmust not exceed 3.0 Vdc.

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

22kΩ

22nF

+5V

CSYNC

(INor OUT)

Ext. 4 fsc

XTAL

x 4fsc

OSC IN

(see Note 2)

TO MICRO

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Digital Ground

Analog Ground

5730A-04.EPS

Page 7

FUNCTIONAL DESCRIPTION

The STV5730Aoperates in ”mixed mode” or ”full page mode” :

- Mixed mode : the device is line locked to the incomingCVBS signal.The textissuperimposed overthe CVBSinputeitherinB&Wortranslucent. It mayalsobesuperimposedincolorbyusingthe R/G/Boutputs.

- Full pagemode : the device generatesa 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 backgroundarea.

It performs the followingtext features:

- Page composition: 11rows X 28 characters

- Number of displayed characters: 308 (max)

- Character composition: 12 dots X 18 lines

- ROMcharac terset : 128 userdefina blecharacters

STV5730A

- Screendisplaypositions:58horizontalpositions, 63 vertical positions

- Rowpositionoffset , eachrow : Xoffsetfrom 0 to +15,Yoffsetfrom -17 to +17

- Display enable : each row or page

- Charactercolor : 1 out of 8, each character

- Characterbackgroundcolor : 1 outof 8, characterandpage enabledorsetidenticalto character color

- Characterborder color : 1 out of 8, row enabled or set identical to character color

- Pagebackgroundcolor : 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

- Blinkfrequency: 0.5 or 1.0 second

- Blinkduty 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,startingwith any characteraddress.

1.2 - CharacterFormat and Attributes

11 10 9 8 7 6 0

BE R G B BK CHARACTER CODE

CHARACTER CODE : 1 character out of 128 from the characterROM BK : BK=0 : character blink disabled

BK=1 : characterblink enabled

R/G/B : Charactercolor:

BE : BE=0 :

BE=1 :

000 001 010 011 100 101 110 111

the character background is disabled

the character backgroundis enabled

black blue green cyan red magenta yellow white

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STV5730A

FUNCTIONAL DESCRIPTION (continued)

1.3 - Row Attributes

Thereare 11 row attributes, numberedfrom 0 to 10. Theymay be writtenone by one or sequentially. The row attributeformat is as follows :

11 8765 0

HPOS OFFSET RE FBE VPOS OFFSET

VPOS OFFSET : the MSBis the sign bit (0 : positive,1 : negative).If theoffsetispositive(from0 to+17),

then the correspondingnumber 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 correspondingnumberof lines are subtractedfrom the display of the row.

FBE : FBE=0 : the characters are displayed withoutborder

FBE=1: the characters are displayedwith border

RE : RE=0 :

RE=1 :

HPOSOFFSET : The display of the row is shifted to the right by the correspondingnumber of pixels

(from0 to 15).

1.4 - The Control Registers

Thereare 5 registers for microprocessorcontrol.They can be writtenindividuallyor sequentially:

- the ZOOMregister address : 12

- the COLORregister 13

- the CONTROLregister 14

- the POSITIONregister 15

- the MODEregister 16

the charactersof the roware not displayed. They are replaced by the page backgroundcolor. the charactersof the roware displayed.

1.4.1 - Zoom Register

11109876543210

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

HZt[1:0] : Toprow horizontalzoom factor (ie row 0)

HZt[1:0] = 00

1 pixel per character dot

2 pixels per characterdot

3 pixels per characterdot

4 pixels per characterdot

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

VZt[1:0] = 00

1 pixel per character line

2 pixels per characterline

3 pixels per characterline

4 pixels per characterline HZm[1:0] : Same as HZt[1:0], for middlerows (ie rows 1 to 9) VZm[1:0] : Same as VZt[1:0],formiddle rows HZb[1:0] : Same as HZt[1:0], for bottom row(ie row 10) VZb[1:0] : Same as VZt[1:0],forbottom row

The outputof thisregister issynchronizedby thehorizontalsynchronism.The RESETmessageclearsthis register.

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STV5730A

FUNCTIONAL DESCRIPTION (continued)

1.4.2 - Color Register (pageattributes)

11109876 210

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

SBC FBC BCC

SBC : screen background color FBC : character border color BCC : characterbackground color

The output of thisregister is synchronizedby the horizontalsynchronism.

1.4.3 - ControlRegister

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 controlled by BE (see character word description)

C1 = 1 : all displayedcharacter 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. CBACKGand CBORD)

C3 = 1 : the character foreground,border and background colors are all set to the character

attributevalue(see paragraph1.2). This optionis mainly intended for full page mode, CVBSor 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

C7 : C7 = 0

C7 = 1

C8 : C8 = 0 : the standard is NTSC, 60Hz

C8 = 1 : the standard is PALor SECAM with M6 = 0, 50Hz

C9 : C9 = 0 : character colorencoding is disabled

C9 = 1 : character colorencoding is enabled

C10 : C10 = 0 : theluminance levels are generated internally

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

C11 : C11 = 0 : VideoFull Page Mode. A stable full page modetext is displayedwhile the screen

C11= 1 : Normalfull page mode is active.

The outputof thisregister issynchronizedby thehorizontalsync(exceptC7).The RESETmessageclears this register.

blinkingoff

0.75blinking duty cycle

0.5 blinking duty cycle

0.25blinking duty cycle

an external input compositesync is taken from the CSYNC pin the sync is extracted by the STV5730A.The currently active sync is output on the CSYNCpin

background is the unlocked video input signal.

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STV5730A

FUNCTIONAL DESCRIPTION (continued)

1.4.4 - PositionRegister

11 6 5 0

VERTICAL POSITION HORIZONTAL POSITION

HORIZONTAL POSITION Any value from 6 to 63 VERTICALPOSITION Any value from1 to 63

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::

M9 : M9 = 0

M9 = 1::

M10 : M10 = 0

M10 = 1::

M11 : M11 = 0

M11= 1::

Note : This mode overides the normal functions of Pins CSYNC and BAR.

the BAR pin is disabled the BAR pin has an actionon theline PLL the missing sync pulses are not detected the missing sync pulses are detected the MUTE pin is forced to 0 the MUTE pin deliverstheinternal MUTE signal the MUTE time constantis 8lines the MUTE time constantis 32lines

the sync is not re-inserted the sync is re-insertedfor 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 encoderis enabled (PALor NTSC) the color encoderis disabled(B&W or SECAM)

the VIDEO OUT2 pin outputstheVIDEO IN signal the VIDEO OUT2 pin outputsthecomposite sync

the VIDEO OUT2 pin is in low impedancestate the VIDEO OUT2 pin is in high impedance state

Normalmode CSYNCPin outputs the burstgate,BAR Pin outputs the VSYNC (see Note)

No delay compensation It enablesthe delay compensationof the internal sync extractor.

The mute signal output is synchronizedon vertical syncin order to limit its transitions. The mute signal is not synchronizedon vertical sync thus accelerating the VIDEO IN presencedetection (useful in full page mode).

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Page 11

STV5730A

FUNCTIONAL DESCRIPTION (continued) 2 - THE MICROPROCESSORSERIALINTERFACE

The STV5730Ais down loaded by the microprocessor througha threewire serial interface : DATA,CLK, CSN. The CLK and CSN signals are internallyORed in orderto validatethe transferwhen the STV5730A is chipselected only (i.e. CSN = 0). The CSN risingedge 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 formatsmay be usefulto speed up the STV5730Adown loading.

15 1211 87654 0

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

This16-bitaddressmessageloadstheserial interfacewritepointer.Thisaddressis incrementedafter each data message.

15 12 11 0

0001 DATA[11:0] DATA

This 16-bit data message writes the data at the locationindicated by the writepointer.

DATA[7:0] DATA

This 8-bitdata messagewrites the data at the locationindicated by the writepointer. 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 fromthe previous8-bit or 16-bit data message.

15 12 11 0

0010 don’tcare CONTROL

This 16-bit control messagestops the 4*fsc quartz oscillator.

15 12 11 0

0011 don’tcare CONTROL

This 16-bit control message resets the circuit and startsthe 4*fscquartz oscillator. This message should not be usedif an external4 x fsc clock is used instead of the quartz. It is mandatorythat reset operation is as described in paragraph 2.3.

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Page 12

STV5730A

FUNCTIONAL DESCRIPTION (continued) Figure2

15 14 13 12 2 1 0

DATA

CLK

CSN

76543210

DATA

CLK

CSN

DATA

CLK

CSN

2.2 - The WritePointer

As described in the ”messageformat” paragraph, an address consists of three fields : STRU[7:6], BUF[11:8], DEPL[4:0].

mentedaftereachdatamessage.When thewrite of a row is completed, the writepointer is automaticallyset to the next row first character.

- STRU[7:6] = 01 : The STRU[7:6] fieldindicateswhether it isa PAGE address or a ROW ATTRIBUTE / REGISTER ad-

dress. It also determinesthe 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 incre-

It isalso a PAGEaddressbut the incrementation schemeisa bitdifferent: whenthe writeof a row is completed, the write pointer is automatically set to the firstcharacter of the same row.

- STRU[7:6] = 11 :

Itisarow attributeor aregisteraddress.The BUF field must be set to 0000 and the DEPL field is incrementedaftereach data access.

2.2.1 - Address Map

PAGE : ROW 0 : 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]from 0 to 27

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

ROW10 : STRU[7:6]= 0 or 1 - BUF[11:8] = 10 - DEPL[3:0]from 0 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 forCOLOR register,

14 for CONTROLregister, 15 forPOSITION register, 16 for MODE register

16-BIT

MESSAGE

8-BIT

MESSAGE

0-BIT

MESSAGE

5730A-05.EPS

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Page 13

FUNCTIONAL DESCRIPTION (continued)

2.3 - Initializationand Down-loadingSequence

It is importantthat theSTV5730Ais correctlyreset and initialized after the circuit is powered prior to anywriting. This routine is shown in Figure 3. The two initialization bytes (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

STV5730A

TheSTV5730APLLis alsoinsensitiveto the head switching disturbingthe synchronisminVTR applications (playback).

The missing pulses may be detected. The M1 modebit enablesthe 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.TheBAR inputis enabledby the M0 mode bit.

3.2 - HorizontalSyncRe-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.Themodifiedsyncis active on all output pins (ie CSYNC if C7 is set, VIDEO OUT1, VIDEO OUT2).

Ajitter greater than 0.42useccannotbe cancelled.

3.3 - Full Page Mode Behavior

Inthiscase,thePLLislockedon an internal64usec referencederivedfrom the 4*fsc quartz.

TheSTV5730Ageneratesa non interlaceoutput.

Set RAM Attributes

i.e. TEXT PAGE

* Write Pointer * Data * etc.

Write

STOP

3 - THE LINE LOCKED PLL

The PLLfrequencyis 504 * f

=7.875MHz.

3.1 - Mixed Mode Behavior

In mixedmode,the internalPLLis linelockedtothe incomingCVBSsignal.The syncis eitherextracted by the STV5730A(if C7 control bit is set) or provided bythe applicationin acompositeformon the CSYNC pin (if C7 control bit is cleared). The STV5730A separates the vertical sync from the compositesynchronism.

The STV5730A PLL features built-in protection mechanismsagainstmissingandparasitichorizontal sync pulses. These mechanisms are activated when the loop is locked.

4 - MUTE

The STV5730A monitors the sync to determine whetherit is a stable signal or not.

MUTE =high : no stable signal MUTE =low : stable CVBSinput signal

The MUTE search time constant may be either 8 lines or 32 lines, accordingto the M3 mode bit. Thesignalthat is deliveredto the MUTE outputpin is synchronized on the vertical sync if M11 is

5730A-14.EPS

cleared. It is forced low if the M2 mode bit is low. This signal maybe monitoredby the microprocessor to switch the STV5730A from mixed mode to fullpage mode and viceversa(usingtheC0 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 enteredon the LESCREENand LECHARpins (as selectedby the C10 control bit).

Theluma signalis outputon the YOUTpinto allow the user to notch filter it. It is then re-input on the YINpin.YOUTandYINmaybe connectedtogether for minimal cost applications.

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Page 14

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

nominalvalue : 1.25V

- LESYNC : sync level

nominalvalue : LEBLACK- 300mV

- LESCREEN : pagebackgroundlevel

nominalvalue : LEBLACK+ 150mV

- LECHAR : characterlevel

nominalvalue : LEBLACK+ 650mV

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

5.2 - External Bias Mode

This mode is intended to give more flexibilityto the user.C10 must be set. The LESCREEN and LECHARlevels may be user defined relatively to the internalLEBLACKlevel. Thefinallumaamplitudeshouldnotbegreaterthan the peak white level. Theselevels may be static or dynamic. Dynamiclevelscan be easily generated by analog sum of the R/G/B and CO STV5730A outputs (a few resistors are necessary) to give grey scale charactershading in the mixed mode. C0 is useful to control the character foreground lumalevel.

6 - THE CHROMA GENERATOR

TheSTV5730Aencoderoperatesinfullpagemode only.ItmayperformPALorNTSCencodingaccording to the C8 control bit.

A 4*fsc chroma quartz crystal is necessary (fsc =4.43MHz for PAL,3.58MHz for NTSC).

The encodercan be turned off by the M6 mode bit for black & white or for SECAMapplications.

The character encoding is controlled by the C9 controlbit.

The chroma signal is output on the COUT pin for externalfilteringand for attenuationif necessary.It is thenre-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: 320mV

- blue or yellow colors nominal amplitude :

420mV

- red, magenta,green or cyan colorsnominalam-

plitude: 580mV

7 - THE MARKERS

The STV5730Acan generate 3 different markers that can be activated simultaneously (i.e. on the samepage).

The followingmarker features are performed:

- Blinking character,characterbackground off. Thecharacter foregroundblinks (BK= 1, BE= 0 or C1 = 1).

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

- Blinking character,characterbackground on. Thecharacter foregroundblinks and the characterbackgroundremains(BK= 1, BE=1, C1=0).

8 - THE TRANSLUCENT MIXED MODE Figure4 : TheTranslucent Mixed Mode Output

Configuration

disable

VIDEO OUT1

VIDEO OUT2

STV5730A

The VIDEOOUT1 and VIDEOOUT2 outputs may be summed via two external resistors to create a translucent text (mixed mode). In this case, the backgroundpictureis still visible behind the text. The background picture visibility (or level of translucenceis controlled by the resistorratio. 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 controlswitches. The summay becancelledbysettingthe M8mode bit. In this case, the VIDEO OUT2 pin is in high impedancestate and the resistor networkdelivers VIDEOOUT1 only.

Whenusing the resistor network, please set M8 in the following cases :

- in full page mode

- when OSDin not displayed

- to select opaque text. This allows the viewer to select by softwarethe preferreddisplay mode.

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

5730A-06.EPS

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Page 15

STV5730A

FUNCTIONAL DESCRIPTION (continued) 9 - VIDEO FULL PAGE MODE

In additionto thenormal full page mode in which a uniformely colored screen background is generated, theSTV5730Ais able to performa ”video full page mode”.

Normal and video full page mode are selectedby 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 withoutcolored background.

Presencedetection is permanently active to keep the microcontroller informed of the input signal quality. The information is delivered by the MUTE pin.

Thisinformationcan beusedbythemicrocontroller to force the STV5730A into the mixed mode (set C0 low) when the input signal becomes good enough.

Table1

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

x Text + R1x VIDEO IN

In the video full pagemode, it canbe usefull to set the M11(mode register)bit high, so that the mute signalisnotsynchronizedonthe verticalsync,thus acceleratingthe VIDEO IN presence detection.

10 -S-VHS APPLICATION (see Figure 5) The STV5730Acan be used inS-VHSapplications

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

input. The VIDEO OUT1 output then delivers a Y +textsignal,whilstthe VIDEOOUT2deliversthe 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 signalin mixedmode or the COUToutput signal in full page mode.

In mixedmodethe chromasignal(C)can be externally attenuated (multistandard translucentoperation) or killed (PAL/NTSC opaque operation only) during the character gate controlled by the fast blankingsignal.

MIXED MODE

VIDEO IN or

+ R

VIDEO IN

or Text

Figure 5 : S-VHSInput/OutputConfiguration

STV5730A

INTERNALBIAS

VIDEO IN VIDEO OUT1

VIDEO OUT2

CIN

CHARACTER

GATED

ATTENUATOR

COUTFP2223

OP TIONAL

FILTER

OSD

Yor Text

Text R

Yor

EXTERNAL

SWITCH

Mixed Mode (MM) Full Page Mode (FP)

Fullpage mode Opaque mixed mode

Transluce nt mixed mode

5730A-07.EPS

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Page 16

STV5730A

FUNCTIONAL DESCRIPTION (continued) 11- THE CVBS OUTPUTPICTURE

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

- Blink on/off (BK character attribute& C[6:5] controlbits)

- 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 character attribute. C3 = 0 : CSCREEN, CBACKGand 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.

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 17

STV5730A

FUNCTIONAL DESCRIPTION (continued) 12 - THE R/G/B OUTPUT PICTURE

The followingtables show the picture design in R/G/B output mode, accordingto :

- Blink on/off (BK character attribute& C[6:4] controlbits)

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

- Character border on/off (FBE row attribute)

- C3 = 0 : CSCREEN, CBACKGand CBORD are page attributes, definedby the colorregister.

- C3 = 1 : CSCREEN is definedby the colorregister.CBACKGand CBORDare identicalto CCHAR and thus are character attributes. It is recommended to use CO output signalin this case.

AnR/G/Bexternalswitchmustbe controlledbythe STV5730AFBoutputto performthecharacterinsertion. C0 may be usedas an additionalcharacter 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 video Blinking and Char Backg on CBACKG video

CCHAR CBORD video

CCHAR CBORD CBACKG video

CHARACTER

BORDER

if on

CHARACTER

BORDER

if off

CHARACTER

BACKGROUND

PAGE

BACKGROUND

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

CHARACTER

BORDER

if on

CHARACTER

BORDER

if off

CHARACTER

BACKGROUND

PAGE

BACKGROUND

thus are character attributes.

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Page 18

STV5730A

FUNCTIONAL DESCRIPTION (continued) 13 - STANDARDCHARACTERS

The defaultdevice is deliveredwith a standardset of ROM based characters(see Figure 6). The user can redefine the total characterset (except for the character 00H (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

5730A-12.EPS

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Page 19

FUNCTIONAL DESCRIPTION (continued) 13 - STANDARDCHARACTERS (continued) Figure6 (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

STV5730A

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

5730A-13.EPS

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Page 20

STV5730A

PACKAGEMECHANICAL DATA

28 PINS- PLASTICMICROPACKAGE

PM-SO28.EPS

Dimensions

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

Millimeters Inches

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

Information furnished is believed tobe 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 otherwiseunder anypatent 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 componentsin life support devices or systems withoutexpress written approval of SGS-THOMSON Microelectronics.

Purchase of I

C Patent. Rights to use these components in a I2C system,is granted provided that the system conforms to

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.

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

(Max.)

SO28.TBL

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