SGS Thomson Microelectronics STV2116A Datasheet

BUS CONTROLLEDPAL/NTSC TV PROCESSOR

I2C BUS CONTROL OF ALLFUNCTIONS

INTEGRATEDFILTERS(TRAP,BANDPASS)

INTEGRATEDLUMINANCEDELAYLINE

PAL/NTSCCHROMADEMODULATORS

NTSCAUTOMATIC FLESH TONECONTROL

AUTOMATICCUT-OFF CURRENTLOOP

TWORGB INPUTS

SVHSSWITCH

TWOPLLs HORIZONTAL DEFLECTION

VERTICALCOUNT DOWN

3 CRYSTALSAPPLICATIONCAPABILITY

BLUESCREEN

VERYFEW EXTERNALCOMPONENTS

STV2116A

Used withSTV8223(PIF/SIF/switches),TDA1771 or TDA8174 (frame booster), STV2180 (delay line), it allows to design a PAL/NTSC (BGDKIMN) set with very few external components and no adjustment.

SHRINK42

(Plastic Package)

DESCRIPTION

The STV2116Ais a fully bus controlled IC for TV luma, chromaand deflection processing.

PIN CONNECTIONS

ACC

SDA SCL

ECS VOL

SWI

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22

CHROMA/SCANNINGGROUND

3.58MHzXTAL

4.43MHzXTAL

CHROMA LOOPFILTER

ACC CONTROLCAPACITOR

DATA WIRE I2C BUS

CLOCK WIRE I2C BUS

FILTERTUNING

EXTERNALCRYSTAL SELECTION

VOLUMEAND MUTE CONTROL VOLTAGE

IF STANDARDAND SWITCH SELECTION

OSD BLUEINPUT

OSD GREENINPUT

OSD REDINPUT

OSD RGB INSERTION

EXTERNALBLUE INPUT

EXTERNAL GREENINPUT

EXTERNALRED INPUT

EXTERNALRGB INSERTION

CVBSOR LUMINANCEINPUT

GND2 V CXTL2 CXTL1

CLPF

FTUN1

BOSD GOSD ROSD

FBOSD

BEXT

GEXT

REXT

FBEXT

Y/CVBS

GND1

ORDER CODE : STV2116A

CC2

BYO

RYO

RYI

BYI

LFB/SC

HOUT

VOUT

VAMP

SLPF

SXTL

BCL

ICAT

CHR/SVHS V

CC1

CHROMA/SCANNING/BUSSUPPLY B-Y OUTPUT R-Y OUTPUT R-Y INPUT B-Y INPUT LINE FLYBACKINPUT/SANDCASTLE OUTPUT HORIZONTALOUTPUT VERTICALOUTPUT AMPLITUDECONTROLVOLTAGE SCANNINGLOOP FILTER 503kHzCERAMIC BEAM CURRENT LIMITER CATHODECURRENT MEASUREMENT RED OUTPUT GREEN OUTPUT BLUE OUTPUT RED CUT-OFFCAPACITOR BLUE CUT-OFFCAPACITOR GREEN CUT-OFF CAPACITOR CHROMINANCEINPUT/SVHS SELECTION VIDEO SUPPLYBUS/VIDEOGROUND

2116A-01.EPS

June 1997

1/24

STV2116A

BLOCKDIAGRAM

ICAT

292827

BCL

VOUT

VAMP

HOUT

EXTERNAL OSD

15 14 13 12

FB R G BFBRGB

R-Y B-Y

STV2116A

CONTROL

BLANKING

AUTO CUT-OFF

BLACK & WHITE

RGB SWITCHES

Contrast

MATRIX

CONTRAST

SATURATION

BRIGHTNESS

FRAME

SCANNING

VIDEO

IDENTIFICATION

SYNC

SEPARATOR

CUT-OFF DRIVE STD

CONT SAT BRIG

HUE SHARP

LINE

SCANNING

BUS

DECODER

6 7 11 10

21 1 373332

LFB/SC

SXTAL SLPF

SDA SCL

GND2 SWI VOLCLPF R-Y B-Y

GND1

2/24

CC2

CC1

22 42 19 18 17 1639 38

CAP

DECOUPLING

FILTER

TUNING

LINE

DELAY

SHARPNESS

FILTERTUNING

TRAP BANDPASS

Y/CVBS

SVHS SWITCH

CHR

STANDARD

IDENTIFICATION

ACC5

CHR

ACC

ECS

KILLER

PAL/NTSC

DELAY LINE INTERFACE

PAL/NTSC

DEMODULATORS

PLL

CXTAL2

CXTAL1

44041

2116A-02.EPS

FUNCTIONAL DESCRIPTION 1 - DEFLECTIONCIRCUIT

Note : [X,Y] : line number referred to the internal line counter

numbering

- Fully integratedsynch. separator , with a low pass filter,a blacklevelalignmentof the Y/CVBSinput,a slicinglevelat2/3,1/3of thesync.pulseamplitude.

- Frame sync. pulse locked on 2 f

frequency to

perfect interlace.

- 500kHzVCO with an externalceramicresonator.

- Two phaselocked loops

• the first PLLlocks the VCO on the videosignal

frequency,

• thesecondPLLcompensatestheline transistor

storage time.

- Three time constantsfor the first PLL.

• thelongtimeconstantisusedfornormaloperation

•

the short time constant is automatically used duringthe frameretrace and in searchmodeof VCRwhen theframe pulse is outside[258,264] and [309,314].

• verylongtimeconstantwhennovideorecognition Timeconstants in normaloperation

(automaticselection of time constants): 50Hz input signal :

- short time constant : [306, 21]

- long timeconstant : the rest of the field 60Hz input signal :

- short time constant : [0, 16]

- long timeconstant : the rest of the field

•

inhibitionof the first PLL: the first locked loop is opened from line 309 to line4.5(or 314)in 50Hzmode.It isopenedfrom line 258 to line 5.5 (or264) in 60Hz mode.

•

thetimeconstantsvaluesare chosenby means of external components.

• possibility to force the short time constant

throughthe bus.

• possibility to force the very long time constant

throughthe bus.

- Video identification : coincidence detector between the line synchro top and a line frequency windowfromthefirstPLL.The videoidentification status isavailablein theoutput registerof theI

bus decoder.

- Generation of burst gate pulses and line frequency signals from the first PLL to drive the chroma and video circuits. The burst gate pulse is alsosent to the sandcastle generator.

- Frame synchro window : [248,352] catching

- Field frequencyselection windows : [248,288] 60Hz mode selection if two

consecutive frame pulses occur inside this window,otherwise 50Hz modeselection.

[288,352] 50Hz modeselection window

STV2116A

- frameblanking pulse : fromline 0 to 21 in 50Hz mode fromline 0 to 16 in 60Hz mode

- Verticaloutput pulse is 10.5lines long.

- Horizontal output pulse : 28µs line pulse on an open collectoroutput;

- Start up circuit: the horizontaloutput is at a high level when V shutting down, horizontal pulses are disabled when V

- Soft-start circuit : the duty cycle of the horizontal outputis 78%(Thigh/(Thigh+ TLow))when V is lowerthan(0.75 x V During the falling time, a 78% duty cycle HOUT pulse is provided when V (0.60 x V

CC2

- Possibility to disable the horizontal output pulse through the bus (force a high level on HOUT).

- Horizontalposition adjustmentcontrolledby bus.

- Buscontrolledoutputvoltagetoadjustthevertical amplitude;thisvoltagepermitstoadjustthe slope of theverticalsawtoothgeneratedbythe external framebooster.

- Bus controlledvertical position ; the high level of the vertical pulse permits to adjust the vertical position.

- Bus controlled 4/3-16/9 selection : the low level of theverticalpulseis0.1Vwhen16/9isselected, 2V when4/3 is selected.

- Combined flyback input and sandcastle output (Pin 37). Two thresholds on LFB/SCOPin : The lowestthreshold(0.7V) permitsto extractthe line blankingpulse;thehighestthreshold(2V)permits to extractthe linepulse forPLL2. Thesandcastle signal at Pin 37 is used to control the external basebandchroma delay line.

2 - FILTERS

- Integratedtrap filter :

Q =

−3dB

Center frequency: - 4.43MHz,

- Integratedchroma bandpass: Q = 3.5 Center frequency: 4.43MHz,3.58MHz

- Integrateddelay line : Bandwidth= 8MHz

- Integratedlow pass filter for deflectionpart.

- All filtersare tunedwith a referencephaselocked loop.ThePLLconsistsof a lowpassfilter,a phase comparator,aloopfilter(anexternalcapacitor).The referencesignalisthecontinuouscarrierwavefrom theVCO (4.43MHzor 3.58MHz).ThePLLadjusts the center frequency of the lowpass so that it is equalto thereferencesignal.Thetuningvoltageof thePLLis usedto adjustallotherfilters.

increases from 0 to 6.8V. On

isbelow 6.2V.

),during therisingtime.

CC2

CC1

−3dB

−

Q = 1.7 at sharp.min Q = 3.0 at sharp. max

3.58MHzfor PAL, NTSC

CC1

is lower th a n

3/24

STV2116A

FUNCTIONAL DESCRIPTION (continued) 3 - VIDEO CIRCUIT

- 2 RGB inputs : RGB (OSD) input has priority against the RGBext.Maximum contrast on RGB (OSD).-10dB range contrastcontrol on RGBext. Possibility to disable the RGBext insertion throughthe bus.

- Oversizeblanking capability on FB(OSD)(Pin15) input. The RGB ouputswill be blanked whenthe voltage on Pin 15 willexceed the secondthreshold at1.9V (blanking threshold) : the whole field is blankedbutnot theinserted cut-offpulses. The OSD insertion thresholdis 0.7V.

- Automaticcut-off current loop : 2V cut-off range. Sequential cut-off current measurement during the three lines after the frame blanking signal. Leakage current measurement during the frame blanking,memorization on an internalcapacitor.

- Possibility to force through the bus the inserted cut-off pulses on lines 23/24/25(CCIR) in 50Hz and 60Hz mode.

- Warm up detector.

- Beam currentlimiter DC voltageinput. The beam current limiter control voltage will act on contrast first, then the brightness will be decreasedwhen contrastattenuationreaches-5dB.

- Bus control of the red, green and blue channel gain (White point adjustment)

- Buscontrol of thered and greenDC levels(black point adjustment)

- PALmatrix,specificNTSCmatrix when demodulation angles are (0

- Switch-off of the trapfilter in SVHS mode.

- Bus controlledcontrast on luminance (20dB range)

- Bus controlledsaturation (50dB range)

- Bus controlled brightness : 40% range at maximum contrast.

- Bus controlledsharpness (peaking).

- Noise coring function on sharpness.

- Bus controlledblue screen feature

4 - CHROMA CIRCUIT

4.1 - PAL/NTSC Decoders

- SVHSinputs ; bus controlled SVHS mode.

- 30dB rangeACC.

- Use o f a n external base b and delay line (STV2180 recommended).

- Automaticstandard identification,with possibility to force the standardthroughthe bus.

- ACC done by peak detector on synchronousdemodulationof the burst.

- Fully integrated killerfunctions.

- VCO using two standard crystals : 4.43MHz and

3.58MHz. One crystal is internally selected de-

, 104o).

pending on the standardselection.

- 3 crystals application capability : one crystal on Pin XTAL1 (4.43MHz or 3.58MHz), two crystals on Pin XTAL 2 (3.58MHz only) which can be selectedby Pin 9 out signal. XTALSPECIFICATION: Frequency: 4.433619MHz(PAL)

3.579545MHz(NTSC M)

3.575611MHz(PALM)

3.582056MHz(PALN) Vibrationmode :Fondamental,series resonance (no serial capacitor) Motional capacity : 13fF ±3fF Resonance resistance: < 70Ω Shunt capacitance: < 7pF

Spuriousresponse: No resonanceat 3*f

and ±90odemodulationangles for PAL

-0

,90o)or(0o,104o) = demodulation angles for

-(0 NTSC. The selection of 90

or 104ois made

3kHz

through the bus.

- Bus controlHue adjustment in NTSC mode.

- NTSCautomaticfleshcontrol.Buscontroll eddisa ble.

- Switchable chroma demodulator gain (+6dB) for NTSConly application,when no externalchroma delay line is used.

4.2 - StandardIdentification

- Sequentialidentification.

- 3 identification sequences : XTAL1 (4.43MHz) mode to identify either PAL or NTSC, XTAL2 (3.58MHz)modetoidentifyeitherPALorNTSC,no SECAMsignalchecking.Incaseofsinglestandard operation,werecommendtoforcethisstandardby thebus which permitsthe useof onlyonecrystal.

- Blanking of the (R-Y) and B-Y) outputs during color search mode.

5 - OTHER FUNCTIONS : IF CONTROLS

5.1 - VolumeControl and Mute

Thevolume controlvoltage rangeon Pin 10is from

0.5V to 5V. A low voltage on Pin 10 (below 0.1V)

will mute the FM demodulator of the IF circuit (STV8223).Thus there will be no sound either on the speakeror an audio output plug. The volumecontrol voltageand themute level are controlledby the bus.

5.2- TV/SCARTModeSelection

The selection of the TV/External (AV) mode is controlledbythe bus.The selectionis convertedin two voltageson Pin 11. The lowestvoltage selectsthe TVmode. The highest voltage (open collector output with internalpull-upresistorto V

)selectstheExternal

(AV)mode.

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STV2116A

I2C BUS SPECIFICATION GeneralComments

SlaveAddress : 8A (HEX)(1000101X) WRITEMODE DATAFORMAT

Slave Address Register Address Data

1000 1010

(8A)

Thenot used bits in data byte mustbe put to “0”.

READ MODE DATAFORMAT

Slave Address Data

1000 1011

(8B)

MSB on the left, LSB on the Right.

MSB LSB

XXXXXXXX

X: not significant bit - S : significant bit

XXXS SSSS

(from 00 to 11HEX)

XXSS SSSS

(6 significant bits Max.)

SSSS SSSS

(8 significant bits)

InputSignals

(Write Mode)

VIDEO

Address

Dec (HEX)

0 (00) Contrast 5 XXX00000 = -20dB

0 (00) External Fast Blanking Enable 1 XXSX XXXX

1 (01) Saturation 6 XX00 0000 = -44dB

2 (02) Brightness 5 XXX0 0000 = -20%

2 (02) RGB Outputs Blanking 1 XXSX XXXX

3 (03) Red Drive Adjust(white point red adjust) 6 XX00 0000 = -6dB

4 (04) Red Cut-off Adjust 6 XX00 0000 = +150mV

5 (05) Green Drive Adjust (white point green adjust) 6 XX00 0000 = -6dB

6 (06) Green Cut-off Adjust 6 XX00 0000 = +150mV

7 (07) Blue Drive Adjust (white point blue adjust) 6 XX00 0000 = -6dB

8 (08) Sharpness 3 XXXXX000 = PeakingMin.

8 (08) Blue Screen 1 XXXX SXXX 0 = blue screen disable

8 (08) Third CrystalSelection

(This bit is not significant in automatic color standard mode - data = 06Hex in register 0AHex)

Description

Data

(Bits)

XXX11111 = 0dB

0 = RGBext insertion enable 1 = RGBext insertion disable

XX11 1111 = +6dB

XXX11111 = +20%

0 = Normal mode 1 = Blanking active

XX11 1111 = 0dB

XX11 1111 = -150mV

XX11 1111 = 0dB

XX11 1111 = -150mV

XX11 1111 = 0dB

XXXX X111 = Peaking Max.

1 XXXS XXXX 0 = low level on Pin 9

Comments

1 = blue screen enable

1 = high level on Pin 9

5/24

STV2116A

I2C BUS SPECIFICATION (continued) InputSignals (Write Mode) (continued)

CHROMA

Address

Dec (HEX)

Description

9 (09) Hue 6 XX00 0000 = -45

10 (0A) Standard Selection 4 XXXX SSSS

10 (0A) SVHS Selection 1 XXXS XXXX 0 = No SVHS (CVBS mode)

10 (0A) XTAL1 (Pin 3) Indication 1 XXSX XXX 0 = 4.43MHz Crystal on Pin 3

14 (0E) Chroma Demodulation Gain 1 XXXS XXXX 0 = 0dB

14 (0E) Flesh Control 1 XXSX XXXX 0 = Flesh control disable

Data

(Bits)

Comments

XX11 1111 = +45

0000 = PAL/XTAL1 (4.43MHz) 0001 = PAL/XTAL2 (3.58MHz) 0010 = NTSC/XTAL1/90 0011 = NTSC/XTAL2/90 1010 = NTSC/XTAL1/104 1011 = NTSC/XTAL2/104 011X = Auto/90

111X = Auto/104

o o

0100 = Not allowed 0101 = Not allowed 1000 = Not allowed 1001 = Not allowed 1100 = Not allowed 1101 = Not allowed

1 = SVHS mode

1 = 3.58MHz Crystal on Pin 3

1 = +6dB

1 = Flesh control enable

DEFLECTION

Address

Dec (HEX)

Description

11 (0B) Horizontal Shift 6 XX00 0000 = -2.5µs

12 (0C) Vertical Amplitude 6 XX00 0000 = 1.2V

13 (0D) Vertical Position 3 XXXX X000 = 3.8V

13 (0D) 50/60Hz Selection 2 XXXS SXXX 00 = Auto

13 (0D) Horizontal Output (HOUT) Safety 1 XXSX XXXX 0 = Normal mode

14 (0E) PLL1 Time Constant 2 XXXX XXSS 00 = Normal mode (Auto)

14 (0E) Interlace 1 XXXX XSXX 0 = Interlace

14 (0E) 4/3 16/9 Selection 1 XXXX SXXX 0 = 4/3 (V

Data

(Bits)

Comments

XX11 1111 = +2.5µs

XX11 1111 = 6.2V

XXXX X111 = 6.3V

01 = 60Hz 10 = 50Hz 11 = Auto

1 = HOUT disabled (high level)

01 = Short time constant 10 = Very long time constant 11 = PLL1 inhibition (open loop)

1 = DE-Interlace

1 = 16/9 (V

OUT-Low

= 2V)

= 0.1V)

6/24

I2C BUS SPECIFICATION (continued) InputSignals (Write Mode) (continued)

OTHERS

Address

Dec (HEX)

15 (0F) Volume 6 XX00 0000 = 0.5V

16 (10) Mute 1 XXXX XXXS

16 (10) AV Switch Selection 2 XXXX XSSX

16 (10) Not Used 1 XXXX SXXX

16 (10) Cut-off Pulse Position 1 XXXS XXXX

17 (11) Only for Test 6 XXSS SSSS

Description

Data

(Bits)

XX11 1111 = 5V

0 = Mute not active 1 = Mute active

00 = TV mode 01 = not allowed 10 = not allowed 11 = External (AV) mode

S = 0 default value

0 = lines 23/24/25 in50Hz, lines 18/19/20 in 60Hz 1 = lines 23/24/25 both in 50Hz and 60Hz

00 0000 = Test mode not active

STV2116A

Comments

OutputSignals

(ReadMode)

READ REGISTER

Description Data (Bits) Comments

Field Frequency 1 XXXX XXXS

Video Identification 1 XXXX XXSX

SVHS Status 1 XXXX XSXX

Standard Status 3 XXSS SXXX

Circuit Identification 2 SSXX XXXX

1 = 50Hz 0 = 60Hz

1 = No Identification 0 = Video Identification

1 = No SVHS 0 = SVHS

111 = PAL/XTAL1 (4.43MHz) 110 = NTSC/XTAL1 101 = not to be used 011 = PAL/XTAL2 (3.58MHz) 010 = NTSC/XTAL2 X00 = Color off

11 = STV2118B/2116/2112 10 = STV2116A 01 = STV2112B 00 = STV2216

7/24

STV2116A

I2C BUS SPECIFICATION (continued) Bus Register Initial Conditions

Notused bits are preset to “0”.

Address

Dec (HEX)

0 (00) XX01 0000 Mid. contrast ; RGBext insertionenable 1 (01) XX10 0000 Mid. saturation 2 (02) XX01 0000 Mid. brightness ; Blanking : normal mode 3 (03) XX10 0000 Mid. RED drive adjust 4 (04) XX10 0000 Mid. RED cut-off adjust 5 (05) XX10 0000 Mid. GREEN drive adjust 6 (06) XX10 0000 Mid. GREEN cut-off adjust 7 (07) XX10 0000 Mid. BLUE drive adjust 8 (08) XX00 0100 Mid. sharpness ; Bluescreen not active, External crystal selection inauto mode

9 (09) XX10 0000 Mid. hue 10 (0A) XX00 0110 Auto search color standard ; no SVHS 11 (0B) XX10 0000 Mid. horizontal shift 12 (0C) XX10 0000 Mid. vertical amplitude 13 (0D) XX00 0100 Mid. vertical position ; Auto search field frequency ; HOUT : normal mode 14 (0E) XX00 0000 PLL1 time constant: normal mode ; Interlace ; 4/3 selection ;chroma gain = +0dB; no flesh 15 (0F) XX10 0000 Mid.volume

16 (10) XX00 0000 Mute not active ; TV mode ; Not used ;

17 (11) XX00 0000 Testmode not active

Data Initial

Value

Comments

Cut-off pulses on lines 23/24/25 in 50Hz or lines 18/19/20 in 60Hz

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