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MT9M034 데이터시트(PDF) 12 Page - ON Semiconductor |
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MT9M034 데이터시트(HTML) 12 Page - ON Semiconductor |
12 / 39 page MT9M034 www.onsemi.com 12 Table 6. FRAME TIME: LONG INTEGRATION TIME Parameters Name Equation (Number of Pixel Clock Cycles) Default Timing at 74.25 MHz F’ Total Frame Time (Long Integration Time) Context A: (R0x3012 x (A + Q)) + R0x3014 + P1 + P2 Context B: (R0x3016 x (A + Q)) + V R0x3018 + P1 + P2 3,300,012 pixel clocks = 44.44 ms 1. The MT9M034 uses column parallel analog−digital converters; thus short line timing is not possible. The minimum total line time is 1650 columns (horizontal width + horizontal blanking) for HDR mode and 1400 for linear mode. The minimum horizontal blanking is 370. Exposure Total integration time is the result of Coarse_Integration_Time and Fine_Integration_Time registers, and depends also on whether manual or automatic exposure is selected. The actual total integration time, tINT is defined as: tINT + tINTCoarse * 410 * tINTFine (eq. 2) = (number of lines of integration x line time) − (410 pixel clocks of conversion time overhead) − (number of pixels of integration x pixel time) where: ♦ Number of Lines of Integration (Auto Exposure Control: Enabled) When automatic exposure control (AEC) is enabled, the number of lines of integration may vary from frame to frame, with the limits controlled by R0x311E (minimum auto exposure time) and R0x311C (maximum auto exposure time) ♦ Number of Lines of Integration (Auto Exposure Control: Disabled) If AEC is disabled, the number of lines of integration equals the value in R0x3012 (context A) or R0x3016 (context B) ♦ Number of Pixels of Integration The number of fine shutter width pixels is independent of AEC mode (enabled or disabled): − Context A: the number of pixels of integration equals the value in R0x3014 − Context B: the number of pixels of integration equals the value in R0x3018. Maximum value for tINTFine is line length pixel clocks − 611 Typically, the value of the Coarse_Integration_Time register is limited to the number of lines per frame (which includes vertical blanking lines), such that the frame rate is not affected by the integration time. For more information on coarse and fine integration time settings limits, please refer to the Register Reference document. NOTE: In HDR mode, there are specific limitations on coarse_integration_time due to the number of line buffers available. Please refer to the section called “HDR Specific Exposure Settings”. For best image quality, it is recommended that the integration time be set to two rows or greater for the shortest exposure, particularly for monochrome sensors. For linear mode, this would be the coarse integration time (R0x3012). For HDR mode, the integration time should be set such that the T3 exposure is 2 rows or greater. Setting the exposure time to 1 row may result in non−uniformity between rows. |
유사한 부품 번호 - MT9M034_17 |
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유사한 설명 - MT9M034_17 |
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