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AT71-ATM1M30M-B0 Datasheet(PDF) 7 Page - ATMEL Corporation |
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AT71-ATM1M30M-B0 Datasheet(HTML) 7 Page - ATMEL Corporation |
7 / 26 page 7 5429B–IMAGE–04/05 [Preliminary] ATMOS -1M60/1M30 If shutter time is set to > 0: Readout is suspended between two consecutive frame readout and shutter output signal is acti- vated (programmable polarity) for a time configurable within 0 to Tsh range by step of T1. Figure 4-2. Free-run Mode and Shutter Chronogram The maximum frame rate of 48 frame/s for the 1M60 camera (or 24 frame/s for the 1M30 cam- era) is given in this mode with a shutter time set to 0. See register Aperture Shutter Time @ 246H, Internal Register Mapping on page 17. 4.1.3 Triggered Mode Principle: An external trigger starts the reset of the sensor, then snap and readout of a frame, the integration time is defined by readout time (+ programmable shutter time, when used). The trigger event initiates the following sequence: • Stop of readout frame in progress and reset of readout pointer to line 1 • Readout of previous dummy frame and integration start of the frame N. The readout data of previous frame is not forwarded on CameraLink interface (FVAL inactive) • Shutter output signal is activated during a time programmable within 0 to Tsh range by step of T1 • Readout of frame N. The readout data is forwarded to the CameraLink interface (FVAL active) starting with the first line • Readout of dummy frames (to prevent against large dark current integration) while the camera waits for the next trigger event Table 4-1. Shutter Time Values at Free-run Mode Label Description 1M60 1M30 Tsh Maximum shutter time (ms) 655 1310 T1 Step duration (µs) 10 20 Line 1 Integration (Frame N) Readout and Reset Line n Integration (Frame N) Frame N Programmable Shutter Time Shutter Line n Readout and Reset Readout Time Readout Frame N - 1 Time out Line 1 |
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