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STV0672 数据表(PDF) 9 Page - STMicroelectronics |
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STV0672 数据表(HTML) 9 Page - STMicroelectronics |
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9 / 105 page  CMOS Sensor; Customer Datasheet, Rev 3.0, 28 September 2000 VV5410 & VV6410 Commercial in confidence 9/105 cd5410-6410f-3-0.fm 3. Operating Modes 3.1 Video Timing The video format mode on power-up is CIF 30fps by default. After power-up the mode can be changed by a serial interface to write to the video_timing register. The frame/field rate is also programmable via the serial interface. Bit [3] of serial register [16] selects between 30 and 25 frames per second for the CIF modes and 60/50 fields per second for the Digital and Analog Timing modes. Please note that the sensor can exit low power in ANY of the available video modes. The number of video lines in each frame is the same (320) for both the CIF modes. The slower frame rate (25 fps) is implemented by simply extending the line period from 416 pixel periods to 500 pixel periods. Table 3 details the setup for each of the video timing modes. A serial write to serial register [16] will force the contents of other registers in the serial interface to change to the appropriate values, regardless of their present state. If for example a different data output mode is required than the default for a particular video mode, a write to the appropriate register after the mode has changed will restore the desired value. 3.1.1 Arbitration registers When the operating video mode is changed a number of serial registers are forced into new states. The complete list is as follows: Video Mode Clock (MHz) System Clock Divisor Video Data Line Length Field Length Data Output Mode PAL (3.2 fsc) 28.636360 / 2.5 2 356 x 292 454 312/313 5-wire NTSC (3.2 fsc) 35.46895 / 2.5 2 306 x 244 364 262/263 5-wire CIF - 25 fps 16.0 4 356 x 292 500 320 5-wire CIF - 30 fps 16.0 4 356 x 292 416 320 5-wire QCIF - 25 fps 8.0 8 180 x 148 250 160 5-wire QCIF - 30 fps 8.0 8 180 x 148 208 160 5-wire QCIF - 60 fps 16.0 8 180 x 148 208 160 5-wire Table 3 : Video Timing Modes Arbitrated feature Video mode selected/value automatically programmed PAL NTSC CIF 25fps CIF 30fps PTQCIF 25fps PTQCIF 30fps SSQCIF 25fps SSQCIF 30fps line length 453 363 499 415 249 207 249 207 field length 311 261 319 319 159 159 159 159 system clock divi- sion 22448888 free running qcknote1 yes yes no no no no no no extra black linesnote2 yes yes no no no no no no Table 4 : Arbitration registers |
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