SGS Thomson Microelectronics STV2118B Datasheet

BUS CONTROLLED PAL/SECAM/NTSC TV PROCESSOR

I2C BUS CONTROL OF ALL FUNCTIONS

INTEGRATED FILTERS (TRAP,BANDPASS, CLOCHE)

INTEGRATED LUMINANCEDELAYLINE

PAL/SECAM/NTSCCHROMADEMODULATORS

AUTOMATIC CUT-OFF CURRENTLOOP

TWORGB INPUTS

SVHSSWITCH

TWOPLLs HORIZONTALDEFLECTION

VERTICALCOUNT DOWN

VERYFEW EXTERNALCOMPONENTS

DESCRIPTION

The STV2118Bis a fully bus controlled IC for TV luma, chroma and deflectionprocessing.

Used withSTV8224 (PIF/SIF/switches), TDA1771 or TDA8174(framebooster),STV2180(delayline), it allows to design a PAL/SECAM/NTSC (BGDKILMN) set with very few external components and no adjustment.

STV2118B

SHRINK42

(Plastic Package)

ORDER CODE : STV2118B

PINCONNECTIONS

CHROMA/SCANNING GROUND

ACC CONTROLCAPACITOR

CLOCHE FILTER TUNING

VOLUME ANDMUTE CONTROL VOLTAGE

IF STANDARD AND SWITCH S ELECTION

EXTERNAL BLUE INPUT

EXTERNAL GREEN INPUT

EXTERNAL RGB INSERTION

CVBS OR LUMINANCE INPUT

3.58MHz XTAL

4.43MHz XTAL

CHROMA LOOP FILTER

DATAWIRE I

CLOCK WIRE I

OSD GREEN INPUT

OS D RGB INSERTION

EXTERNAL RED INPUT

C BUS

FILTER TUNING

OS D BLUE INPUT

OS D RED INPUT

ACC SDA SCL

VOL

SWI

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

GND2 V CXTL2 CXTL1

CLPF

FTUN1 FTUN2

BOSD

GOSD

ROSD

FBOSD

BEXT

GEXT

REXT

FBEXT

Y/CVBS

GND1

42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23

CC2

BYO RYO RYI BYI LFB/SC HOUT VOUT VAMP SLPF SXTL BCL ICAT RO GO BO CR CB CG CHR/SVHS V

CC1

CHROMA/SCANNING/BUS SUP P LY B-Y OUTPUT R-Y OUTPUT R-Y INPUT B-Y INPUT LINE FLYBACK INPUT/SANDCASTLE OUTPUT HORIZONTAL OUTP UT VERTICAL OUTPUT AMPLITUDE CONTROL VOLTAGE SCANNING LOOP FILTER 503kHz CERAMIC BEAM CURRENT LIMITER CATHODE CURRENT MEASUREMENT RED OUTPUT GREEN OUTPUT BLUE OUTPUT RED CUT-OFF CAPACITOR BLUE CUT-OFF CAPACITOR GREEN CUT-OFF CAPACITOR CHROMINANCE INPUT/SVHS SELECTION VIDEO SUP PLYBUS/VIDEO GROUND

2118B-01.EPS

June 1996

1/25

STV2118B

BLOCK DIAGRAM

FILTER

TUNING

FILTER TUNING

TRAP BANDP ASS

CLOCHE

SVHS SWITCH

CHR

ACC5

SECAM

DEMODULATOR S

PLL

Y/CVBS

CHR

ACC

CXTAL2

CXTAL1

20 23

CLOCHE

TUNING

IDENTIFICATION

DELAYLINE INTERFACE

CC1

22 42 19 18 17 1639 38

DELAY

LINE

SHARP NESS

STANDARD

SECAM KILLER

NTSC

KILLER

CC2

PAL/

R-Y B-Y

SATURATION BRIGHTNE SS

SEPARATOR

DEMODULATOR S

MATRIX

CONTRAST

SYNC

PAL/NTSC

EXTERNAL OS D

FB RGBFBRG B

Contras t

IDENTIFICATION

SHARP

HUE

DECODER

15 14 13 12

RGB SWITCHES

VIDEO

BRIG

SAT

CONT

BUS

STD

DRIVE

CUT-OFF

STV2118B

BLANKING

AUTO CUT-OFF

BLACK&WHITE

CONTRO L

FRAME

SCANNING

LINE

SCANNING

24 26

ICAT

BCL

VOUT

35 34

VAMP

HOUT

44041

21 1 373332

GND2 SWI VOLCLPF R-Y B-Y

GND1

6 7 11 10

SDA SCL

SXTAL SLPF

LFB/SC

2118B-02.EPS

2/25

FUNCTIONAL DESCRIPTION 1 - DEFLECTION CIRCUIT Note : [X,Y] : line number referred to the internal

line counternumbering

- Fullyintegratedsynch. separator,withalowpass filter, a blacklevelalignmentof the Y/CVBSinput, a slicing level at 2/3,1/3 of the sync. pulseamplitude.

- Frame sync. pulse locked on 2 f

frequency to

perfect interlace.

- 500kHzVCOwithan externalceramicresonator.

- Twophase locked loops

• thefirst PLLlocksthe VCO on thevideo signal

frequency,

• thesecondPLLcompensatestheline transistor

storage time.

- Three time constants for the first PLL.

• thelong timeconstantisused for normal opera-

tion

• the short time constant is automatically used

during the frameretraceand in searchmode of VCR when theframe pulse is outside[258,264] and [309,314].

• verylongtimeconstantwhenno video recogni-

tion

Timeconstants in normaloperation (automatic selection of time constants) :

50Hzinput signal :

- short time constant : [306, 21]

- longtime constant : the restof the field 60Hzinput signal :

- short time constant : [0, 16]

- longtime constant : the restof the field

• inhibitionof the first PLL :

the first locked loop is opened from line 309 to line 4.5(or314)in50Hzmode.It is openedfrom line 258 to line 5.5 (or 264) in 60Hz mode.

• thetime constantsvaluesare chosenbymeans

of external components.

• possibility to force the short time constant

through the bus.

• possibility to force the very long time constant

through the bus.

- Video identification : coincidence detector between the line synchro top and a line frequency windowfromthefirst PLL.Thevideoidentification statusisavailableinthe outputregisterof the I

bus decoder.

- Generation of burst gate pulses and line frequency signals from the first PLL to drive the

STV2118B

chroma and video circuits. The burst gate pulse is alsosent to the sandcastlegenerator.

- Framesynchrowindow : [248, 352] catching

- Field frequency selectionwindows : [248, 288] 60Hz mode selection if two

consecutive frame pulses occur insidethiswindow,otherwise50Hz mode selection.

[288, 352] 50Hz mode selection window

- frameblanking pulse : from line 0 to 21 in50Hzmode from line 0 to 16 in60Hzmode

- Verticaloutput pulse is 10.5 lineslong.

- 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-startcircuit : the duty cycleof the horizontal output is78 %(Thigh/(Thigh+TLow))whenV is lower than (0.75 x V time. During the falling time, a 78% duty cycle HOUT pulse is provided when V (0.60 x V

CC2

- Possibilityto disable the horizontal output pulse through the bus (forcea high level onHOUT).

- Horizontalposition adjustmentcontrolled by bus.

- Buscontrolledoutputvoltagetoadjustthevertical amplitude;this voltagepermitsto adjusttheslope of the verticalsawtoothgeneratedbythe external frame booster.

- Buscontrolledvertical position; thehigh levelof 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/SCO Pin : The lowest threshold(0.7V) permits to extractthelineblanking pulse; the highest threshold (2V) permits to extract the line pulse for PLL2. The sandcastlesignalat Pin 37is usedto control the externalbaseband chromadelay line.

increases from 0 to 6.8V. On

isbelow 6.2V.

), during the rising

CC2

CC1

is lower than

3/25

STV2118B

FUNCTIONAL DESCRIPTION (continued) 2 - FILTERS

- Integrated trap filter :

−3dB

−

Q =

Centerfrequency : - 4.43MHz,

- 4.25MHz, for SECAM

- Integratedchromabandpass : Q = 3.5 Centerfrequency: 4.43MHz, 3.58MHz

- Integratedcloche filter for SECAM: Q=16 Centerfrequency: 4.286MHz

- Integrateddelay line : Bandwidth = 8MHz

- Integratedlow passfilter fordeflection part.

- All filtersare tunedwith a referencephaselocked loop. The PLL consists of a lowpass filter, a phase comparator,a loop filter (an external capacitor). The reference signal is the continuous carrier wave from the VCO (4.43MHz or 3.58MHz). The PLLadjusts the center frequency of the lowpass so that it is equal to the reference signal. The tuningvoltageof thePLLisusedtoadjustallother filters.Theclochefilteris finetuned witha second PLLoperating during frame retrace.

3 - VIDEO CIRCUIT

- 2 RGB inputs : RGB (OSD) input has priority againstthe RGBext. Maximum contraston RGB (OSD).-12dB range contrast control on RGBext.

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

3.58MHzfor PAL, NTSC (f

= 3MHz ; -20dB

-3dB

rejection between 4.1MHz and 4.4MHz)

Possib ility to disable the RGBext insertio n through the bus.

- Oversizeblanking capabilityon FB(OSD)(Pin15) input. The RGB ouputs will be blankedwhen the voltageon Pin15 willexceedthe secondthreshold at 1.9V (blanking threshold) : the whole field is blankedbutnotthe insertedcut-off pulses.The OSDinsertion 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 measurementduring the frame blanking,memorizationon an internal capacitor.

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

- Warmup detector.

- Beamcurrent limiter 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 pointadjustment)

- Buscontrolofthe red andgreen DC levels (black point adjustment)

- PAL and SECAM matrix, specific NTSC matrix when demodulationangles are (0

,104o).

- Switch-offof the trap filterin SVHSmode.

- Buscontrolledcontraston luminance (20dBrange)

- Buscontrolledsaturation (50dB range)

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

- Bus controlled sharpness (peaking); sharpness active in PAL/NTSC standardonly.

- Noisecoring function on sharpness.

4/25

FUNCTIONAL DESCRIPTION (continued) 4 - CHROMACIRCUIT

4.1 - PAL/SECAM/NTSC Decoders

- SVHS inputs ; bus controlledSVHS mode.

- 30dB range ACC

- Use of an exter nal base ba nd d elay l ine (STV2180recommended)

- Automaticstandardidentification,with possibility to force the standard throughthe bus.

4.2 - PAL/NTSC Decoders

- ACC doneby peakdetector on synchronousdemodulationof the burst

- Fullyintegrated killer functions.

- VCO using two standard crystals: 4.43MHzand

3.58MHz. One crystal is internally selected dependingon the standard selection.

XTALSPECIFICATION: Frequency:

4.433619MHz(PAL/SECAM)

3.579545MHz(NTSC M)

3.575611MHz(PAL M)

3.582056MHz(PALN) Vibrationmode : Fondamental,seriesresonance

(no serial capacitor) Motionalcapacity : 13fF ±3fF Resonanceresistance: < 70Ω Shunt capacitance : < 7pF Spuriousresponse : No resonanceat 3*f

-0

and ±90odemodulationangles for PAL

-(0

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

NTSC. The selection of 90

or 104ois made

±3kHz

through the bus.

- Buscontrol Hueadjustment in NTSC mode.

4.3 - SECAM Decoder

- ACC

- Fullyintegrated killer

- Twointegrateddiscriminatorswith two PLL

- Integrateddeemphasis

STV2118B

4.4 - Standard Identification

- Sequentialidentification.

- 3 identification sequences : XTAL1 (4.43MHz) mode to identify either PAL or NTSC, XTAL2 (3.58MHz)mode to identifyeither PALor NTSC, SECAM mode(XTAL1 selection).

- PAL/NTSCpriority

- the SECAM mode is locked after two identified SECAM sequences

- the SECAM mode can beselected in50Hz only

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

5 - OTHER FUNCTIONS : IF CONTROLS

5.1 - Volume Control and Mute

Thevolumecontrol voltagerangeon Pin 10isfrom

0.5V to 5V. A low voltage on Pin 10 (below 0.2V)

will mute the FM demodulator of the IF circuit STV8224. It will put the volume at the minimum level and thus there will be no sound either in TV mode or SCARTmode.

The volume controlvoltageand the mute level are controlledby thebus.

5.2- IFStandard and TV/SCART ModeSelection

The selection of IF standard (positive or negative visionmodulation)and theTV/SCARTmode is controlledbythe bus.Theselectionisconvertedinfour voltageson Pin 21.

The lowest voltage selects the TV mode and the NEGATIVE vision modulation.

The highest voltage (open collector output with internal pull-upresistorto V mode and the NEGATIVE visionmodulation.

The two other intermediate voltages select either TV mode and POSITIVE vision modulation or SCARTmode and POSITIVE visionmodulation.

) selects the SCART

5/25

STV2118B

I2C BUS SPECIFICATION GeneralComments

SlaveAddress : 8A (HEX) (1000101X) WRITEMODE DATA FORMAT

Slave Address Register Address Data

1000 1010

(8A)

The not used bits indata byte must be put to ”0”.

READ MODE DATAFORMAT

Slave Address Data

1000 1011

(8B)

MSB on the left, LSBon theRight.

MSB LSB

XXXXXXXX

X :not significant bit - S : significant bit

Input Signals (Write Mode) VIDEO

Address

Dec (HEX)

0 (00) Contrast 5 XXX0 0000 = -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 pointblue adjust) 6 XX00 0000 = -6dB

8 (08) Sharpness 3 XXXX X000 = Peaking Min.

Description

XXS SSSS

(from 00 to 11HEX)

Data

(Bits)

XXSS SSSS

(6 significant bits Max.)

SSSS SSSS

(8 significant bits)

Comments

XXX1 1111 = 0dB

0 = RGBext insertion enable 1 = RGBext insertion disable

XX11 1111 = +6dB

XXX1 1111 = +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.

6/25

I2C BUS SPECIFICATION (continued) Input Signals (Write Mode) (continued)

CHROMA

Address

Dec (HEX)

Description

9 (09) Hue 6 XX00 0000 = -45

10 (0A) StandardSelection 4 XXXX SSSS

10 (0A) SVHS Selection 1 XXXS XXXX

Data

(Bits)

XX11 1111 = +45

0000 = PAL/XTAL1 (4.43MHz) 0001 = PAL/XTAL2 (3.58MHz) 0010 = NTSC/XTAL1/90 0011 = NTSC/XTAL2/90 0100 = SECAM/XTAL1 1010 = NTSC/XTAL1/104 1011 = NTSC/XTAL2/104 011X = Auto/90 111X = Auto/104

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

0 = No SVHS (CVBS mode) 1 = SVHS mode

STV2118B

Comments

o o

DEFLECTION

Address

Dec (HEX)

Description

11 (0B) HorizontalShift 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

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

14 (0E) PLL1 Time Constant 2 XXXX XXSS

14 (0E) Interlace 1 XXXX XSXX

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

Data

(Bits)

XX11 1111 = +2.5µs

XX11 1111 = 6.2V

XXXX X111 = 6.3V

00 = Auto 01 = 60Hz 10 = 50Hz 11 = Auto

0 = Normal mode 1 = HOUT disabled (high level)

00 = Normal mode (Auto) 01 = Short time constant 10 = Very long time constant 11 = PLL1 inhibition(open loop)

0 = Interlace 1 = DE-Interlace

0 = 4/3 (V 1 = 16/9 (V

OUT-Low

Comments

= 2V)

= 0.1V)

7/25

STV2118B

I2C BUS SPECIFICATION (continued) Input Signals (Write Mode) (continued)

OTHERS

Address

Dec (HEX)

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

16 (10) Mute 1 XXXX XXXS

16 (10) IF Standard / AV Switch 2 XXXX XSSX

16 (10) Not Used 1 XXXX SXXX

16 (10) Cut-off PulsePosition 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 = INT/FM (negative) 01 = INT/AM (positive) 10 = EXT/AM (positive) 11 = EXT/FM (negative)

S = 0 defaultvalue

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

Comments

Output Signals (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 =SECAM/XTAL1 011 = PAL/XTAL2 (3.58MHz) 010 = NTSC/XTAL2 X00 = Color off

11 = STV2118B/2116/2112 10 = STV2116A 01 = STV2112A 00 = STV2216

8/25

+ 17 hidden pages