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| For Video Equipment MN67621F Color Video Camera Synchronizing Signal Generator LSI Overview The MN67621F generates color video camera synchronizing signals for the NTSC, PAL, and SECAM video systems. It divides the reference frequency to generate the horizontal synchronizing signal fH , the vertical synchronizing signal fV , and the composite synchronizing signal. A built-in 4fSC crystal oscillator circuit divides the frequency by four to generate the color subcarrier frequency signals SC1 and SC2. Pin Assignment Features Supports CCDs with 420, 510, 590, and 670 H pixels Supports NTSC, PAL, and SECAM video systems PAL system 25Hz offset Includes built-in oscillator circuit using external crystal Generates 14 signals, including the horizontal and vertical synchronizing signals and the color subcarrier frequency signals. VD N.C. N.C. N.C. N.C. PBLK N.C. N.C. WBKL (TOP VIEW) QFP044-P-1010 Applications Color video cameras OSCI 1 2 3 4 5 6 7 8 9 10 11 TEST1 TEST2 TEST3 VSS1 CLK VDD1 EO N.C. ED N.C. N.C. 34 35 36 37 38 39 40 41 42 43 44 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 N.C. N.C. N.C. CCDS2 CCDS1 CSYNC CBLK CP2 TVMD2 SCBLK FMTP TVMD1 LSW BFIDP N.C. WHD VSS2 SC2 SC1 VDD2 N.C. OSCO MN67621F Block Diagram For Video Equipment TEST1 TEST2 35 34 MIXER 36 TEST3 1/2 1/2 4fSC (P) 12 (N) 1/910 11 OSCO OSCI SC1 15 SC2 16 1/4 oD 40 EO fH/fV 17 37 (N) (P) VSS2 VSS1 LSW 1/2 21 42 18 VDD2 VDD1 H dec. 14 39 202fH/206fH 26 23 9 C dec. 27 28 24 6 2fH 20 V dec. 1/525 1/625 fV 1 1/101 2fH 1/103 fH HD WHD CP2 FMTP WBLK CBLK CSYNC SCBLK PBLK BFIDP VD CCDS1 29 38 1/3 1/8 1/5 1/7 22 CLK TVMD1 TVMD2 25 1/2 CCDS2 30 For Video Equipment Pin Descriptions Pin No. 39 37 14 17 11 12 38 Symbol VDD1 VSS1 VDD2 VSS2 OSCI OSCO CLK Pin Name Power supply Power supply Power supply Power supply Crystal oscillation input Crystal oscillation input Clock input MN67621F Function Description "H" level (5 V) power supply for horizontal and vertical synchronizing signal circuits "L" level (0 V) power supply for horizontal and vertical synchronizing signal circuits "H" level (5 V) power supply for color subcarrier circuits "L" level (0 V) power supply for color subcarrier circuits Connect these pins to a 4fSC crystal oscillator. The pins have built-in feedback resistors. If using an external clock, supply it to the OSCI pin and leave the OSCO pin open. Supply the reference clock for the horizontal and vertical synchronizing signals. NTSC PAL "L" "H" 510H "H" "L" 590H "L" "H" SECAM "L" "L" 670H "L" "L" 22 25 29 30 34 35 36 15 16 TVMD1 TVMD2 CCDS1 CCDS2 TEST1 TEST2 TEST3 SC1 SC2 Television system selection input TVMD1 TVMD2 "H" -- 420H The pins include built-in pull-up resistors. CCD scan lines selection input CCDS1 CCDS2 "H" "H" The pins include built-in pull-up resistors. Test input fSC (B-Y) output fSC (R-Y) output Test inputs Keep these pins at "L" level. The pins include built-in pull-down resistors. This color subcarrier signal is formed by dividing the crystal oscillator frequency (4fSC) by four. Color subcarrier signal If SC1 is the 180 signal, this signal has the following phase. NTSC system: 90 PAL system: 90 when LSW is at "L" level 270 when LSW is at "H" level 28 1 18 27 42 26 CSYNC VD WHD CBLK HD CP2 Composite synchronizing signal output Vertical drive output Wide HD output Composite blanking output Horizontal drive output Clamp pulse output Composite blanking signal Vertical drive signal Wide HD signal Preblanking signal Composite blanking signal Signal for erasing video signal Horizontal drive signal Clamp pulses for luminance and color difference signals Horizontal deflection start pulses MN67621F Pin Descriptions (continued) Pin No. 9 Symbol WBLK Pin Name Composite wide blanking output 20 BFIDP Output for burst flag/ identification signal For Video Equipment Function Description Composite wide blanking signal This pin produces blanking pulses wider than the CELK pulses for both horizontal and vertical synchronization. For NTSC and PAL systems, this is the burst flag (BF) output, which gates the color subcarrier signal. For the SECAM system, this is the identification (IDP) signal, which switches the subcarrier waveform. 6 PBLK Composite preblanking output Composite preblanking signal This pin produces blanking pulses narrower than the CBLK pulses for both horizontal and vertical synchronization. Line switch signal The chip generates this signal for each horizontal scan line. During NTSC operation, this pin remains at "L" level. This pin provides the FM demodulator trigger signal for the SECAM system. During NTSC operation, this pin remains at "L" level. 21 LSW Line switch signal output 23 FMTP Trigger signal output 24 SCBLK Subcarrier blanking signal output This pin provides the signal for erasing the subcarrier signal for the SECAM system. During NTSC operation, this pin remains at "L" level. Phase comparator output 40 EO Phase comparator output Operating Modes (1) Television system TVMD1 NTSC PAL SECAM H L L TVMD2 -- H L (2) CCD pixels and reference clock (CLK) frequencies CCD pixels 420H 510H 590H 670H CCDS1 H H L L CCDS2 H L H L CLK frequency (MHz) NTSC 15.891606 (1010fH) 9.534964 (606fH) 22.248249 (1414fH) 25.426570 (1616fH) PAL/SECAM 16.09375 (1030fH) 9.65625 (618fH) 22.53125 (1442fH) 25.75000 (1648fH) Frequency divider ratio for first stage 1/5 1/3 1/7 1/8 For Video Equipment H Decoder Pulse Timing Chart for NTSC MN67621F 1H=63.55s 0 H-SYNC (*1) CSYNC EO -4.72 V-SER 5.35 BF -1.57 CBLK HD 8.50 WHD 2.20 CP2 7.24 PBLK -9.12 WBLK 9.44 7.87 4.72 Unit: s 17.52 *1 420 H 510 H 590 H 670 H : : : : 2.33 2.31 2.34 2.36 MN67621F For Video Equipment Pulse Timing Chart for NTSC Composite and Vertical Synchronizing Signals (1/2) 524 525 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 CSYNC BF CBLK VD PBLK 9H 16H + 8.8s 21.0H + 11.0s 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 CSYNC BF CBLK VD PBLK 9H 16H 21.0H Pulse Timing Chart for NTSC Composite and Vertical Synchronizing Signals (2/2) 488 489 490 525 1 2 3 4 5 6 7 8 9 10 99 100 101 102 CSYNC WBLK 135.5H + 7.5s 226 227 262 263 264 265 266 267 268 269 270 271 272 361 362 363 364 CSYNC WBLK 135.5H + 19.2s For Video Equipment H Decoder Pulse Timing Chart for PAL/SECAM 1H=64s 0 H-SYNC (*1) CSYNC EO -4.66 V-SER 5.59 7.77 BF -1.55 CBLK HD 8.38 WHD 2.17 CP2 PBLK -6.70 WBLK 13.0 IDP 5.29 SCBLK - 0.31 FMTP 10.56 4.66 MN67621F Unit: s 17.40 *1 420 H 510 H 590 H 670 H : : : : 2.30 2.28 2.31 2.33 MN67621F For Video Equipment Pulse Timing Chart for PAL/SECAM Composite and Vertical Synchronizing Signals (1/2) 620 621 622 623 624 625 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 CSYNC BF-(1) BF-(3) CBLK VD PBLK IDP SCBLK LSW(1) LSW(3) 7.5H 21H + 8.8s 25H 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 CSYNC BF-(2) BF-(4) CBLK VD PBLK IDP SCBLK LSW(2) LSW(4) 7.5H 21H 25H + 12.1s For Video Equipment MN67621F Pulse Timing Chart for PAL/SECAM Composite and Vertical Synchronizing Signals (2/2) 584 585 586 622 623 624 625 1 2 3 4 5 6 97 98 99 100 CSYNC WBLK 137.5H + 7.2s 272 273 274 310 311 312 313 314 315 316 317 318 409 410 411 412 413 CSYNC WBLK 137.5H + 19.0s MN67621F Application Circuit Example For Video Equipment Reference clock input 34 35 36 37 38 39 40 41 42 43 44 TEST1 TEST2 TEST3 VSS1 CLK VDD1 EO N.C HD N.C N.C N.C N.C N.C CCDS2 CCDS1 CSYNC CBLK CP2 TVMD2 SCBLK FMTP 33 32 31 30 29 28 27 26 25 24 23 MN67621F 1 2 3 4 5 6 7 8 9 10 11 VD N.C N.C N.C N.C PBLK N.C N.C WBLK N.C OSCI TVMD1 LSW BFIDP N.C WHD VSS2 SC2 SC1 VDD2 N.C OSCO 22 21 20 19 18 17 16 15 14 13 12 5V For Video Equipment Package Dimensions (Unit: mm) QFP044-P-1010 MN67621F 12.300.40 10.000.20 33 23 22 (1.00) 10.000.20 34 44 12 1 (1.00) 0.80 11 0.350.10 2.000.20 2.100.30 12.300.40 1.150.20 0.15 -0.05 0 to 10 +0.10 0.10 SEATING PLANE 0.100.10 0.600.20 |
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