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CMV2000 데이터시트(PDF) 37 Page - ams-OSRAM AG |
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CMV2000 데이터시트(HTML) 37 Page - ams-OSRAM AG |
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37 / 87 page ![]() CMV2000 Functional description Datasheet • PUBLIC • Document Feedback DS000734 • v8-00 • 2025-Jul-07 37 / 87 / Figure 28: The timing effect of two requests for 1 frame in internal exposure mode 7.2.9.2 External exposure time The exposure time can also be programmed externally by using the T_EXP1 input pin. This mode needs to be enabled by setting the appropriate register (address 41). In this case, the exposure starts when a high state is detected on the T_EXP1 pin. When a high state is detected on the FRAME_REQ input, the exposure time stops and the read-out will start automatically. A new exposure can start by sending a pulse to the T_EXP1 pin during or after the read-out of the previous frame. The minimum time between T_EXP1 and FRAME_REQ is 1 master clock cycle, the minimum time between FRAME_REQ and T_EXP1 pulse is FOT. For an exact calculation of the exposure time see chapter 7.4.1. Figure 29: Request for 2 frames using external-exposure-time mode FRAME_REQ Frame1_cycle FOT Read-out time Exposure time Frame2_cycle FOT Exposure time Read-out time FRAME_REQ Frame1_cycle FOT Read-out time Exposure time Frame2_cycle FOT Exposure time Read-out time FRAME_REQ Frame1_cycle FOT Lost ROT Read-out time Exposure time Frame2_cycle FOT Exposure time Read-out time FRAME_REQ Exposure time Frame1_cycle FOT Read-out time Exposure time Frame2_cycle FOT Read-out time T_EXP1 |
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