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stv2112b bus-controlled pal/secam tv processor august 1998 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 gnd1 y/cvbs bext fbosd ros d gosd bos d swi vol ftun2 ftun1 scl sda acc clpf cxtl1 s elect gnd2 v cc2 byo ryo lfb/sc hout vout vamp slpf s xtl bcl icat ro go bo cr cb cg chr/svhs v cc1 chroma/scanning/bus s up p ly byi ryi b-y output r-y outp ut r-y input b-y input line flyback input/sandcastle outp ut horizontal outp ut vertical outp ut amplitude control voltage s canning loop filter 503khz ceramic beam current limiter cathode current measurement red outp ut green outp ut blue outp ut red cut-off capacitor blue cut-off capacitor green cut-off capacitor chrominance input/svhs s election video s upp ly bus/video ground cvbs or luminance input external blue input os d rgb insertion os d blue input if standard and s witch s election volume and mute control voltage filter tuning data wire i 2 c bus acc control capacitor chroma loop filter xtal2 s election chroma/scanning ground 4.43mhz xtal clock wire i 2 c bus cloche filter tuning os d green input os d red input gext rext fbext external green input external red input external rgb insertion 2112b-01.eps pin connections shrink42 (plastic package) order code : stv2112b . i 2 c bus control of all functions . integrated filters (trap, bandpass, cloche) . integrated luminance delay line . pal/secam chroma demodulators . automatic cut-off current loop . two rgb inputs . svhs switch . two plls horizontal deflection . vertical count down . very few external components description the stv2112b is a fully bus controlled ic for tv luma, chroma and deflection processing. used with stv8224 (pif/sif/switches), tda1771 or tda8174 (frame booster),stv2180 (delay line), it allows to design a pal/secam(bgdkil) set with very few external components and no adjustment. 1/24
y chr fb rg bfb rg b y/cvbs chr acc select cxtal1 r g b icat cr cg cb bcl vout hout sxtal slpf lfb/sc gnd2 swi vol clpf r-y b-y filter tuning v cc1 sda scl cloche tuning sharp v cc2 gnd1 filter tuning trap bandpass cloche svhs switch 20 23 89 delay line sharpness matrix saturation brightness contrast rgb switches contrast blanking auto cut-off black & white control 22 42 19 18 17 16 39 38 r-y b-y external osd 15 14 13 12 29 28 27 30 26 24 25 31 35 vamp 34 frame scanning line scanning 36 21 1 37 33 32 sync separator standard identification acc 5 pal killer secam killer secam demodulators pal demodulators delay line interface 2 3 44041 bus decoder 6 7 11 10 brig sat cont std drive video identification cut-off stv2112b pll 2112b-02.eps block diagram stv2112b 2/24
functional description 1 - deflection circuit note : [x,y] : line number referred to the internal line counter numbering - fully integrated synch. separator, with a low pass filter, a black level alignment of the y/cvbs input, a slicing level at 2/3,1/3of the sync. pulse amplitude. - frame sync. pulse locked on 2 f h frequency to perfect interlace. - 500khz vco with an externalceramic resonator. - two phase locked loops ? the first pll locks the vco on the video signal frequency, ? the second pll compensates the line transistor storage time. - three time constants for the first pll. ? thelong timeconstantis usedfor normaloperation ? the short time constant is automatically used during the frame retrace and in search mode of vcr when the frame pulse is outside [258,264] and [309,314]. ? very long time constant when no video recognition time constants in normal operation (automatic selection of time constants) : 50hz input signal : - short time constant : [306, 21] - long time constant : the rest of the field ? inhibition of the first pll : the first locked loop is opened from line 309 to line 4.5 (or 314) in 50hz mode. ? the time constantsvalues are chosenby means 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 be- tween the line synchro top and a line frequency window from the first pll. the video identification status is available in the output register of the i 2 c bus decoder. - generation of burst gate pulses and line fre- quency signals from the first pll to drive the chroma and video circuits. the burst gate pulse is also sent to the sandcastle generator. - frame synchro window : [248, 352] catching - field frequency selection windows : [288, 352] 50hz mode selection window - frame blanking pulse : from line 0 to 21 in 50hz mode - vertical output pulse is 10.5 lines long. - horizontal output pulse : 28 m s line pulse on an open collector output; - start up circuit : the horizontal output is at a high level when v cc increases from 0 to 6.8v. on shutting down, horizontal pulses are disabled when v cc is below 6.2v. - soft-start circuit : the duty cycle of the horizontal output is 78 % (thigh/(thigh + tlow))when v cc1 is lower than (0.75 x v cc2 ), during the rising time. during the falling time, a 78% duty cycle hout pulse is provided when v cc1 is lower than (0.60 x v cc2 ). - possibility to disable the horizontal output pulse through the bus (force a high level on hout). - horizontal position adjustment controlled by bus. - bus controlledoutput voltage to adjustthe vertical amplitude ; this voltagepermitsto adjustthe slope of the vertical sawtooth generated by the external frame booster. - bus controlled vertical 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 the vertical pulse is 0.1v when 16/9 is selected, 2v when 4/3 is selected. - combined flyback input and sandcastle output (pin 37). two thresholds on lfb/sco pin : the lowest threshold (0.7v) permits to extract the line blanking pulse ; the highest threshold (2v) per- mits to extract the line pulse for pll2. the sand- castle signal at pin 37 is used to control the external baseband chroma delay line. 2 - filters - integrated trap filter : q = 1 f o f - 3db - f - 3db f o q = 1.7 at sharp. min q = 3.0 at sharp. max center frequency : - 4.43mhz for pal - 4.25mhz, for secam (f -3db = 3mhz; -20db rejection between 4.1mhz and 4.4mhz) - integrated chroma bandpass : q = 3.5, center frequency= 4.43mhz - integrated cloche filter for secam : q = 16, center frequency = 4.286mhz - integrated delay line : bandwidth = 8mhz - integrated low pass filter for deflection part. - allfilters aretunedwitha referencephaselockedloop. the pll consists ofa lowpass filter, a phasecompa- rator, a loop filter (with an externalcapacitor). the ref- erence signal is the continuouscarrier wave from the vco (4.43mhz). the pll adjusts the center fre- quency of the lowpass so that it is equal to the referencesignal.thetuningvoltageofthepllisused to adjust all otherfilters. the cloche filter is fine tuned with a secondplloperatingduring frame retrace. stv2112b 3/24
3 - video circuit - 2 rgb inputs : rgb (osd) input has priority against the rgbext. maximum contrast on rgb (osd). -12db range contrast control on rgbext. possibility to disable the rgbext insertion through the bus. - oversize blanking capability on fb(osd)(pin15) input. the rgb ouputs will be blanked when the voltage on pin 15 will exceed the second thresh- old at 1.9v (blanking threshold) : the whole field is blanked but not the inserted cut-off pulses. the osd insertion threshold is 0.7v. - automatic cut-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 internal capacitor. - warm up detector. - beam current limiter dc voltage input. the beam current limiter control voltage will act on contrast first, then the brightness will be de- creased when contrast attenuationreaches -5db. - bus control of the red, green and blue channel gain (white point adjustment) - bus control of the red and green dc levels (black point adjustment) - pal and secam matrix). - switch-off of the trap filter in svhs mode. - bus controlled contrast on luminance (20db range) - bus controlled saturation (50db range) - bus controlled brightness : 40% range at maxi- mum contrast. - bus controlled sharpness (peaking) ; sharpness active in pal standard only. - noise coring function on sharpness. 4 - chroma circuit 4.1 - pal/secam decoders - svhs inputs ; bus controlled svhs mode. - 30db range acc - use of an external base band delay line (stv2180 recommended) - automatic standard identification, with possibility to force the standard through the bus. 4.2 - pal decoder - acc done by peak detector on synchronous de- modulation of the burst - fully integrated killer functions. - vco using crystal 4.43mhz xtal specification : frequency : 4.433619mhz(pal/secam) vibration mode : fondamental,series resonance (no serial capacitor) motional capacity : 13ff 3ff resonance resistance : < 70 w shunt capacitance : < 7pf spurious response : no resonance at 3*f o 3khz -0 o and 90 o demodulation angles for pal 4.3 - secam decoder - acc - fully integrated killer - two integrated discriminators with two pll - integrated deemphasis 4.4 - standard identification - sequential identification. - 2 identification sequences : pal mode, secam mode - pal priority - the secam mode is locked after two identified secam sequences - the secam mode can be selected in 50hz 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 the volume control voltage range on pin 10 is from 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 soundeither in tv mode or scart mode. the volume control voltage and the mute level are controlled by the bus. 5.2 - if standard and tv/scart mode selection the selection of if standard (positive or negative vision modulation)and thetv/scartmode is con- trolled by the bus. the selection is convertedin four voltages on pin 21. the lowest voltage selects the tv mode and the negative vision modulation. the highest voltage (open collector output with internal pull-up resistor to v cc ) selects the scart mode and the negative vision modulation. the two other intermediate voltages select either tv mode and positive vision modulation or scart mode and positive vision modulation. functional description (continued) stv2112b 4/24
i 2 c bus specification general comments slave address : 8a (hex) (1000101x) write mode data format slave address register address data 1000 1010 (8a) xxxs ssss (from 00 to 11hex) xxss ssss (6 significant bits max.) the not used bits in data byte must be put to o0o. read mode data format slave address data 1000 1011 (8b) ssss ssss (8 significant bits) msb on the left, lsb on the right. msb lsb xxxxxxxx x : not significant bit - s : significant bit input signals (write mode) video address dec (hex) description data (bits) comments 0 (00) contrast 5 xxx0 0000 = -20db xxx1 1111 = 0db 0 (00) external fast blanking enable 1 xxsx xxxx 0 = rgbext insertion enable 1 = rgbext insertion disable 1 (01) saturation 6 xx00 0000 = -44db xx11 1111 = +6db 2 (02) brightness 5 xxx0 0000 = -20% xxx1 1111 = +20% 2 (02) rgb outputs blanking 1 xxsx xxxx 0 = normal mode 1 = blanking active 3 (03) red drive adjust (white point red adjust) 6 xx00 0000 = -6db xx11 1111 = 0db 4 (04) red cut-off adjust 6 xx00 0000 = +150mv xx11 1111 = -150mv 5 (05) green drive adjust (white point green adjust) 6 xx00 0000 = -6db xx11 1111 = 0db 6 (06) green cut-off adjust 6 xx00 0000 = +150mv xx11 1111 = -150mv 7 (07) blue drive adjust (white point blue adjust) 6 xx00 0000 = -6db xx11 1111 = 0db 8 (08) sharpness 3 xxxx x000 = peaking min. xxxx x111 = peaking max. stv2112b 5/24
i 2 c bus specification (continued) input signals (write mode) (continued) chroma address dec (hex) description data (bits) comments 9 (09) not used 10 (0a) standard selection 4 xxxx ssss 0000 = pal/xtal1 (4.43mhz) 0100 = secam/xtal1 011x = auto/90 o 0001 = not allowed 0010 = not allowed 0011 = not allowed 0101 = not allowed 1000 = not allowed 1001 = not allowed 1010 = not allowed 1011 = not allowed 111x = not allowed 1100 = not allowed 1101 = not allowed 10 (0a) svhs selection 1 xxxs xxxx 0 = no svhs (cvbs mode) 1 = svhs mode deflection address dec (hex) description data (bits) comments 11 (0b) horizontal shift 6 xx00 0000 = -2.5 m s xx11 1111 = +2.5 m s 12 (0c) vertical amplitude 6 xx00 0000 = 1.2v xx11 1111 = 6.2v 13 (0d) vertical position 3 xxxx x000 = 3.8v xxxx x111 = 6.3v 13 (0d) 50/60hz selection 2 xxxs sxxx 00 = automode 01 = not allowed 10 = 50hz 11 = not allowed 13 (0d) horizontal output (hout) safety 1 xxsx xxxx 0 = normal mode 1 = hout disabled (high level) 14 (0e) pll1 time constant 2 xxxx xxss 00 = normal mode (auto) 01 = short time constant 10 = very long time constant 11 = pll1 inhibition (open loop) 14 (0e) interlace 1 xxxx xsxx 0 = interlace 1 = de-interlace 14 (0e) 4/3 16/9 selection 1 xxxx sxxx 0 = 4/3 (v out-low = 2v) 1 = 16/9 (v out-low = 0.1v) stv2112b 6/24
i 2 c bus specification (continued) input signals (write mode) (continued) others address dec (hex) description data (bits) comments 15 (0f) volume 6 xx00 0000 = 0.5v xx11 1111 = 5v 16 (10) mute 1 xxxx xxxs 0 = mute not active 1 = mute active 16 (10) if standard / av switch 2 xxxx xssx 00 = int/fm (negative) 01 = int/am (positive) 10 = ext/am (positive) 11 = ext/fm (negative) 16 (10) not used 1 xxxx sxxx s = 0 default value 16 (10) cut-off pulse position 1 xxxs xxxx 0 = lines 23/24/25 in50hz, 1 = not allowed 17 (11) only for test 6 xxss ssss 00 0000 = test mode not active output signals (read mode) read register description data (bits) comments field frequency 1 xxxx xxxs 1 = 50hz 0 = not 50hz video identification 1 xxxx xxsx 1 = no identification 0 = video identification svhs status 1 xxxx xsxx 1 = no svhs 0 = svhs standard status 3 xxss sxxx 111 = pal/xtal1 (4.43mhz) 110 = not to be used 101 = secam/xtal1 011 = not to be used 010 = not to be used x00 = color off circuit identification 2 ssxx xxxx 11 = stv2118a/2116/2112 10 = stv2116a 01 = stv2112b 00 = stv2216 stv2112b 7/24
i 2 c bus specification (continued) bus register initial conditions not used bits are preset to o0o. address dec (hex) data initial value comments 0 (00) xx01 0000 mid. contrast ; rgbext insertion enable 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 9 (09) xx10 0000 not used 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 15 (0f) xx10 0000 mid. volume 16 (10) xx00 0000 mute not active ; int/fm if mode ; not used ; cut-off pulses on lines 23/24/25 in 50hz 17 (11) xx00 0000 test mode not active stv2112b 8/24
absolute maximum ratings symbol parameter value unit v cc supply voltage (pins 22-42) (v cc1(22) v cc2(42) )12v t oper operating temperature 0, +70 o c t stg storage temperature -55, +150 o c 2112b-01.tbl thermal data symbol parameter value unit r th (j-a) junction-ambient thermal resistance (p d = 1.3w) typ. 40 o c/w 2112b-02.tbl electrical characteristics (v cc =9v,t amb =25 o c, unless otherwise specified) symbol parameter test conditions min. typ. max. unit supply v cc1 video supply voltage (v cc1 v cc2 ) 8.1 9 9.9 v v cc2 chroma & scanning & bus supply voltage 8.1 9 9.9 v i cc1 v cc1 current consumption 55 75 95 ma i cc2 v cc2 current consumption pal mode 50 70 90 ma p tot power total dissipation 1305 1700 mw luminance /cvbs input (pin 20) dc 20 dc operating voltage no input signal 3.55 3.7 3.95 v v 20pp cvbs or y input voltage 1 1.41 v pp gy luma gain contrast max., drive max. 4.1 - ctry luma contrast range 18 20 22 db -i 20 negative clamping current during sync. pulse -20 -25 -35 m a i 20 clamping current 5 10 m a combined chrominance and svhs selection input (pin 23) v 23 chrominance input voltage burst amplitude, 100/75 colour bar 0.3 v pp v clip23 input amplitude before clipping 1.0 v pp v dc23 dc voltage svhs mode 1.6 v v th23 svhs threshold voltage 0.5 0.7 v i low23 output current 0v at pin 23 120 170 m a v min23 minimum burst signal amplitude within the acc control range 30 mv pp g acc acc control range change of burst over whole acc control range < 2db 30 db killer colour killer on threshold colour killer off hysteresis burst amplitude on pin 20 or pin 23, s/n > 40db 5 +3 mv pp db rgb inputs (pins 12-13-14-16-17-18) v clamp clamp level contrast max., drive nom. 1.5 1.8 2.1 v v rgb rgb input voltage 0.7 1 v pp g rgb rgb gain contrast max., drive max. 4.0 - ctr rgb rgb contrast range on external rgb (16-17-18) 11.5 db d black difference of black level of internal and external signals at the outputs 200 mv i rgb clamping current 60 100 140 m a 2112b-03.tbl stv2112b 9/24
electrical characteristics (v cc =9v,t amb =25 o c, unless otherwise specified) (continued) symbol parameter test conditions min. typ. max. unit osd fast blanking input (pin 15) v thfb1-15 insertion threshold voltage 0.5 0.7 0.85 v v thfb2-15 blanking threshold voltage 1.6 2.0 2.4 v t swi1-15 insertion switching delay 30 ns t swi2-15 blanking switching delay 50 ns i fb-15 input current 0v at pin 15 50 m a external fast blanking input (pin 19) v thfb-19 threshold voltage 0.5 0.7 0.85 v i fb-19 input current 0v at pin 19 50 m a t swi-19 switching delay 30 ns cathode current input (pin 30) v leak leakage current reference voltage 1.80 2.0 v v coff cut-off current reference voltage refered to leakage current reference 250 mv v sb start beam current detection reference voltage 2.1 2.3 v i low-30 source current 150 250 m a automatic cut-off capacitors (pins 24-25-26) i 24-25-26 control current 70 100 130 m a beam current limiter voltage (pin 31) v th1-31 contrast attenuation starting 6.0 v v th2-31 brightness attenuation starting 5.5 v v th3-31 contrast attenuation ending 5.0 v ctr-bcl contrast attenuation at v 31 =v th3-31 14.0 db v th4-31 brightness attenuation ending 4.5 v brig-bcl brightness attenuation at v 31 =v th4-31 100 % clp 31 high clamping voltage 6.5 v rgb outputs (pins 27-28-29) v bw output signal amplitude (b to w) 0.7v b/w at pin 20, drive max., contrast max., brightness typ., saturation typ. 2.85 v i s27-28-29 output sinking current 1.5 2 ma v m27-28-29 maximum peak white level 7.8 v v black27-28 -29 blanking level no load 0.3 0.45 0.6 v rco cut-off output range 2 2.6 v dcco cut-off adjustment range on red and green ouputs pins 29 and 28, drive max. 300 mv driv drive adjustment range 6.5 db r brig brightness range relative to b/w amplitude on r,g,b outputs at contrast max. 30 40 50 % d v ctr variation of black level with contrast 100 mv d v sat variation of black level with saturation 50 mv d v rel relative variation in black level between the three channels - during variation of contrast(20db) - during variation of brightness (total range) - during variation of vcc (+/-10%) drive max. 0 10 5 20 40 mv mv mv d vtemp black level thermal drift 1 mv/ o c 2112b-04.tbl stv2112b 10/24
electrical characteristics (v cc =9v,t amb =25 o c, unless otherwise specified) (continued) symbol parameter test conditions min. typ. max. unit rgb outputs (pins 27-28-29) (continued) track tracking between luminance and chrominance signals from max. contrast (0db) to -10db contrast 2db bwidth bandwith of output signals at -3db - cvbs input (no svhs) pal - cvbs input(no svhs) secam - y input svhs mode - rgb inputs f osc = 4.43mhz, sharp typ. f osc = 4.43mhz, no sharp no trap filter, sharp typ. 8 3.6 3.0 8 mhz mhz mhz mhz s/n signal to noise ratio of output (v pp /v rms ) 4.43mhz pal signal on y/cvbs input no signal on r-y, b-y inputs contrast max., drive max., saturation typ., sharp typ., bandwidth 5mhz 50 db res residual frequency at f osc at 2 f osc and higher harmonics pal/secam pal/secam 25 10 100 50 mv pp mv pp filters v tun1 tuning voltage range (pin 8) 3.2 to 4.8 v v tun2 cloche tuning voltage range (pin 9) 2.5 to 6.5 v y delay line t d1p delay time pal svhs mode 330 370 400 ns t d2 delay time secam svhs mode 500 540 580 ns t d3p delay time pal cvbs mode 390 425 460 ns t d4 delay time secam cvbs mode 550 590 630 ns sharpness circuit (pal only) f sharp center frequency svhs mode 2.5 mhz g sharp gain variation from min. to max. sharp at f sharp 6db overshoot amplitude variation compared to b/w 2t pulse, sharp max. 150 % pre-shoot amplitude variation compared to b/w 2t pulse, sharp max. -15 % after-shoot amplitude variation compared to b/w 2t pulse, sharp max. -40 % coring coring range compared to b/w 10 % y trap filter f trap trap frequency pal -0.2 f osc +0.2 mhz trap frequency secam -0.2 4.25 +0.2 mhz q trap trap quality factor (q=1/(fo/f-3db - f-3db/fo)) sharpness min. sharpness max. 1.7 3 - - crejpn color subcarrier rejection pal mode, sharpness min. 20 db crejs color rejection secam mode at 4.1mhz at 4.4mhz 18 18 db db chrominance bandpass f c center frequency -0.25 f osc +0.25 mhz q bp bandpass quality factor 2.8 3.5 4.2 - cloche filter f cloche resonant frequency 4.286 mhz q cloche cloche quality factor 14 16 18 - acc capacitor (pin 5) i c5 charging current during burst gate window 250 m a i l5 leakage current 0.2 1 m a chroma pll (pins 2-3) cr 2-3 catching range q = 4.43mhz (pin 3) 600 hz 2112b-05.tbl stv2112b 11/24
electrical characteristics (v cc =9v,t amb =25 o c, unless otherwise specified) (continued) symbol parameter test conditions min. typ. max. unit pll loop filter (pin 4) i c4 control current during burst gate window 400 m a i l4 leakage current 5 m a color difference output signals (pins 40-41) pal demodulator v p40 r-y output signal amplitude (pin 40) |red-blue| axes = 90 o 100/75 colour bar 0.40 0.52 0.60 v pp v p41 b-y output signal amplitude (pin 41) |red-blue| axes = 90 o 100/75 colour bar 0.50 0.66 0.80 v pp g pal gain ratio of both demodulators (b-y)/(r-y) |red-blue| axes = 90 o 100/75 colour bar 1.15 1.27 1.45 - v pndc output voltage when colour killed 5.6 5.8 6.0 v secam demodulators v s40 r-y output signal amplitude (pin 40) 100/75 colour bar 0.8 1.05 1.20 v pp v s41 b-y output signal amplitude (pin 41) 100/75 colour bar 1.00 1.33 1.40 v pp g secam gain ratio of both demodulators (b-y)/(r-y) 1.00 1.27 1.35 - v sdc output voltage when colour killed 5.4 5.6 5.8 v pal /secam matrix g/r (g-y)/(r-y) -0.6 -0.51 -0.4 - g/b (g-y)/(b-y) -0.28 -0.19 -0.15 - saturation control sat max. maximum saturation control (3f) 1v pp cvbs on pin 20 5 +6.5 8 db sat nom. nominal saturation control (20) 1v pp cvbs on pin 20 0 db sat min. minimum saturation control(00) 1v pp cvbs on pin 20 -44 db colour difference input signals (pins 38-39) dcryi dc voltage pin 39 no colour 2.6 2.8 3.0 v dcbyi dc voltage pin 38 no colour 2.6 2.8 3.0 v vryi input signal amplitude pin 39 100/75 color bar 1.05 v pp vbyi input signal amplitude pin 38 100/75 color bar 1.33 v pp i cl38-39 clamping current during burst key 150 m a sync. separator vsync sync. pulse amplitude on pin 20 50 300 mv horizontal oscillator f h50 frequency after divider 50hz input signal 15625 hz f rang frequency control range low frequency high frequency 14500 16100 14850 16300 15200 16500 hz hz f free free running frequency when pll1 open value 03hex in register 0ehex 15000 15800 hz first loop filter (pin 33) i low-33 long time constant output current 0.12 0.15 0.18 ma i high short time constant output current 0.35 0.45 0.55 ma i v low very long time constant 0.02 0.03 0.05 ma second control loop crq 2 control range from start of horizontal output to flyback horizontal position centered 2to14 m s t shift horizontal shift range 4 m s 2112b-06.tbl stv2112b 12/24
electrical characteristics (v cc =9v,t amb =25 o c, unless otherwise specified) (continued) symbol parameter test conditions min. typ. max. unit line flyback input/sandcastle output (pin 37) v sco output voltage during burst key 4.0 5.0 v v cl37 clamped input voltage during flyback 2.5 3.1 v t wbg burst key pulse width 3.7 3.8 3.9 m s t dbg delay of start of burst key to start of sync. 5.2 m s v th1-37 blanking threshold voltage 0.5 0.7 0.9 v v th2-37 pll2 threshold voltage referred to line level v cl37 pll2v th /v cl37 80 % i 37 input current during flyback pulse 0.1 1 ma horizontal output (pin 36) t w36 output pulse width normal operation 26 28 30 m s v low36 voltage output low r pull-up = 1k w 1.1 v v cc start v cc start level voltage on pin 42 6.7 v v cc stop v cc stop level : hysteresis voltage on pin 42, v ccstart -v ccstop 0.60 v i 36 max. maximum allowed output current 10 ma v 36 max. maximum allowed output voltage (open collector) 12 v t ss output pulse duty cycle in soft-start mode (thigh/(thigh + tlow)) v cc2 = 9v, v cc1 < 6.0v (v cc1 rising) 78 % vertical output (pin 35) t w35 output pulse width 10.5 lines v low35 low level output voltage 4/3 low level ouput voltage 16/9 xxxx0xxx (bin) in reg. 0ehex xxxx1xxx (bin) in reg. 0ehex 1.5 2 0.1 2.5 0.5 v v fr35 locking range 248 352 lines f fr-50 free frequency (no video signal) 50hz 314 lines v high35 high level range (vertical position control) xxxxx000(bin) in reg. 0dhex xxxxx111(bin) in reg. 0dhex 3.5 5.7 3.8 6.3 4.2 7.0 v v i sink output sinking current 4/3 16/9 0.2 0.5 ma ma vertical amplitude control (pin 34) v 34r output voltage range xx000000(bin) in reg. 0chex xx111111(bin) in reg. 0chex 1.0 5.6 1.2 6.2 1.5 6.7 v v volume control and mute (pin 10) v r10 output voltage range (volume control) xx000000(bin) in reg. 0fhex xx111111(bin) in reg. 0fhex 0.35 4.2 0.5 4.7 0.7 5.2 v v mut output voltage when mute 0.02 0.1 v 2112b-07.tbl stv2112b 13/24
electrical characteristics (v cc =9v,t amb =25 o c unless otherwise specified) (continued) symbol parameter test conditions min. typ. max. unit if standard control & switch selection (pin 11) v tv/neg output voltage in tv mode and negative vision modulation v cc = 9v 0.1 0.7 v v tv/pos output voltage in tv mode and positive vision modulation v cc = 9v 2.90 3.37 3.80 v v start/pos output voltage in scart mode and positive vision modulation v cc = 9v 5.20 5.62 6.10 v v start/neg output voltage in scart mode and negative vision modulation (open collector mode) v cc = 9v 7.88 9 v r tv/neg output resistance in tv mode and negative vision modulation 200 w r tv/pos output resistance in tv mode and positive vision modulation 6.7 k w r scart/pos output resistance in scart mode and positive vision modulation 11 k w r scart/neg output resistance in scart mode and negative vision modulation (pull-up resistor to v cc ) 18 k w i 2 c bus inputs (pins 6-7) v th6-7 threshold voltage 1.5 2.25 3 v c l6-7 capacitance of each pin 5 10 pf i le ak6-7 leakage current write mode, 0 level on sda or scl 50 m a 2112b-08.tbl stv2112b 14/24
user controls % 120 80 40 0 100 60 20 00 10 1f co de (hex) 2112b-03.eps figure 1 : contrast control curve % 30 10 (10) (30) 20 0 (20) 00 10 1f co de (hex) 2112b-05.eps figure 3 : brightness control curve % 160 07 code (hex) 90 123 456 150 130 140 110 120 100 2112b-06.eps figure 4 : peaking control (2t overshoot) % 250 00 20 3f cod e (hex) 10 30 0 200 150 100 50 2112b-04.eps figure 2 : saturation control curve ou tput voltag e (p in 10) 6 00 20 3f code (hex) 10 30 0 3 5 4 2 1 2112b-07.eps figure 5 : volume control curve stv2112b 15/24
input/output pin configuration pins 2-3 v cc2 gnd2 2112b -08.ep s figure 6 : pins 2, 3 - cxtl1, select 4 v cc2 g nd2 2112b-09.eps figure 7 : pin 4 - clpf 5 gnd2 v cc2 2112b-10.eps figure 8 : pin 5 - acc 6 v cc2 gnd2 2112b-11.eps figure 9 : pin 6 - sda 7 v cc2 gnd2 2112b-12.eps figure 10 : pin 7 - scl 8 v cc1 v cc2 gnd2 2112b-13.eps figure 11 : pin 8 - ftun1 stv2112b 16/24
input/output pin configuration (continued) 9 v cc2 gnd2 2112b-14.eps figure 12 : pin 9 - ftun2 10 gnd2 v cc2 2112b-15.eps figure 13 : pin 10 - volume 11 v cc2 gnd2 2112b-16.eps figure 14 : pin 11 - swi gnd1 v cc1 pins 12-13-14 16-17-18 2112b-17.eps figure 15 : pins 12,13,14,16,17,18- rgb inputs p ins 15-19 v cc1 gnd1 2112b-18.eps figure 16 : pins 15,19 - fbosd, fbext 20 gnd1 v cc 1 v cc 2 2112b-19.eps figure 17 : pin 20 - y/cvbs stv2112b 17/24
input/output pin configuration (continued) 23 gnd2 v cc 1 v cc2 2112b-20.eps figure 18 : pin 23 - chr/svhs 30 v cc1 gnd1 p ins 24-25-2 6 2112b -21.eps figure 19 : pins 24, 25, 26 - cg, cr, cb pins 27-28-29 gnd1 v cc1 2112b-22.eps figure 20 : pins 27, 28, 29 - bo, go, ro 30 v cc1 gnd1 2112b-23.eps figure 21 : pin 30 - icat 31 gnd1 v cc1 v cc1 2112b-24.eps figure 22 : pin 31 - bcl 32 v cc2 gnd2 2112b-25.eps figure 23 : pin 32 - sxtl stv2112b 18/24
input/output pin configuration (continued) 33 gnd2 v cc2 2112b-26.eps figure 24 : pin 33 - slpf 34 v cc2 gnd2 2112b-27.eps figure 25 : pin 34 - vamp 35 v cc2 gnd2 2112b-28.eps figure 26 : pin 35 - vout 36 gnd2 v cc2 2112b-29.eps figure 27 : pin 36 - hout 37 v cc2 gnd2 2112b-30.eps figure 28 : pin 37 - lfb/sc gnd2 v cc 1 v cc 2 p ins 38-39 2112b-31.eps figure 29 : pins 38, 39 - byi, ryi stv2112b 19/24
pins 40-41 v cc2 gnd2 2112b-32.eps figure 30 : pins 40, 41 - ryo, byo 1 42 21 22 g nd2 gnd1 v cc2 v cc1 2112b-33.eps figure 31 : pins 42, 22 - v cc2 ,v cc1 input/output pin configuration (continued) stv2112b 20/24
10nf 10nf 10nf 10nf 100nf 100nf 220nf 22nf 22nf 22nf 22nf 22nf 22nf 1 2 3 4 5 6 7 8 9 10 16 17 18 19 20 26 27 28 29 30 36 37 38 40 11 12 13 14 15 21 22 23 24 31 32 33 34 35 25 39 41 42 3.58mhz 4.43mhz 33nf 100nf 100nf 503khz 100nf 470 m f 16v 9v 100nf 470 m f 16v 9v 470 w 470 w 470 w 100 w 100 w 47pf 100 w 47pf 100nf 270k w 330k w 4.7nf 18k w 1k w 9v to deflection s tages to crt amplifiers 75 w y/cvbs input 1v pp 1k w 10nf chroma input (s-vhs) 75 w i 2 c bus to stv8224 47k w 100nf 220k w pin 22 1n4148 22k w 3.3nf 1 m f 50v pin 42 75 w 75 w 75 w 75 w from external rgb 390 w 1k w from osd + txt 3.9k w 3.9k w 3.9k w 2.2k w 390 w 390 w 1 2 3 4 5 6 78 9 10 11 12 13 14 100nf 100nf 4.02k w 1% 1nf 47 m f 16v 10 w 9v 4.7nf 15k w 1 m f 1n4148 680 w 4.7k w 9v 4.7k w 1n4148 s t v 2 1 1 2 b s t v 2 1 8 0 from horizontal stage lfb (he a ter) 18k w 100nf to pin 42 sda scl vol swi 3.3pf oblk (ove rs ize blanking) gnd2 s elect cxtl1 clpf v cc 2 byo ryo byi acc sda scl ftun1 ryi lfb/s c hout vout vamp slpf s xtl bcl icat ftun2 vol swi bos d gosd ros d fbosd bext ro go bo gext rext fbext cr cb cg y/cvbs gnd1 chr/s vhs v cc 1 2112b-34.eps notes : - stv2112b requires only 1 xtal (4.43mhz). - recommended 4.43mhz xtal is jauch number 10080082. - xtal2 selection pin (pin 2) : we recommend the connection to vcc2 (pin 42). in the case of stv2112b version, this pin can be left open. application diagram stv2112b 21/24
1 2 3 4 5 6 7 8 9 10 10k w 47nf 220nf 2.2 w 100 m f 35v 1n4004 +24v 1000 m f 25v 4.7k w 1000 m f 25v 1000 m f 25v 270 w 1.8k w 47 m f 25v 3.9k w 22 w 2w 470 w vertical yoke +12v 1.2 w 1.3k w 160k w 330k w 620k w 15k w 15k w +9v 100nf 47nf 1n4148 100k w 1k w 15k w 620k w bc547 4.7 m f 470k w +9v 100k w 100k w 560k w bc557 bc547 56k w optional 4/3 - 16/9 switching 27k w vout (from stv2112b pin 35) vamp (from stv2112b pin 34) out v+ v.sync v.size gnd saw buff feedb v cc flyb t d a 1 7 7 1 2112b-35.eps 90 o crt applications vertical stage stv2112b 22/24
r30 470 w c44 220nf 1 2 3 4 5 6 7 89 10 16 11 12 13 14 15 t5 bc547 vertical yoke d8 1n4148 c48 4.7nf c51 33nf r18 330 w r17 330 w scl sda vre t reg v cc lpf cver t gnd s ens m sens p frout ewout ewin oblk hfly breath s t v 2 1 4 5 c34 100pff v cc c20 47 m f c56 220nf r52 4.7k w +9v r81 2.4k w +12v sda vout scl r57 22k w hfly r55 100k w c54 1nf r54 680k w v cc r56 220k w r46 100k w bcl r45 6.2k w v cc c37 1nf c39 10nf c36 10nf r31 100 w r28 100 w r20 3.6 w r19 1.2 w r3 330 w c5 2200 m f r2 10 w 3w +12v r43 1k w t6 tip122 c46 3.3nf r47 39k w r41 3.3k w c68 4.7 m f 160v e/w modulator oblk v cc r50 1.5k w to s tv2112b pin15 c4 1000 m f 25v from s tv2112b pin35 c10 220nf r12 1.5 w r36 3.3k w c31 1.5nf d4 1n4148 d2 1n4148 1 2 3 4 5 6 7 in- out flyback gnd v cc out v cc in+ t d a 8 1 7 2 +24v c9 1000 m f 35v d1 1n4004 +24v c23 100 m f c43 22pf r26 10k w +12v 2112b-36.eps 110 o crt applications : vertical system with east-west stv2112b 23/24
a1 be b1 d 22 21 42 1 la e1 a2 c e1 e e2 gage plane .015 0,38 e2 e3 e sdip42 pmsdip42.eps package mechanical data 42 pins - plastic shrink dip dimensions millimeters inches min. typ. max. min. typ. max. a 5.08 0.200 a1 0.51 0.020 a2 3.05 3.81 4.57 0.120 0.150 0.180 b 0.36 0.46 0.56 0.0142 0.0181 0.0220 b1 0.76 1.02 1.14 0.030 0.040 0.045 c 0.23 0.25 0.38 0.0090 0.0098 0.0150 d 37.85 38.10 38.35 1.490 1.5 1.510 e 15.24 16.00 0.60 0.629 e1 12.70 13.72 14.48 0.50 0.540 0.570 e 1.778 0.070 e1 15.24 0.60 e2 18.54 0.730 e3 1.52 0.060 l 2.54 3.30 3.56 0.10 0.130 0.140 sdip42.tbl information furnished is believed to be accurate and reliable. however, stmicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. no licence is granted by implication or otherwise under any patent or patent rights of stmicroelectronics. specifications mentioned in this publication are subject to change without notice. this publication supersedes and replaces all information previously supplied. stmicroelectronics products are not authorized for use as critical comp onents in lifesupport devicesor systems without express written approval of stmicroelectronics. the st logo is a registered trademark of stmicroelectronics ? 1998 stmicroelectronics - all rights reserved purchase of i 2 c components of stmicroelectronics, conveys a license under the philips i 2 c patent. rights to use these components in a i 2 c system, is granted provided that the system conforms to the i 2 c standard specifications as defined by philips. stmicroelectronics group of companies australia - brazil - canada - china - france - germany - italy - japan - korea - malaysia - malta - mexico - morocco - the netherlands singapore - spain - sweden - switzerland - taiwan - thailand - united kingdom - u.s.a. stv2112b 24/24

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