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Controlling image capture
GUPPY Technical Manual V4.0.1
133
One-shot command on the bus to start of
exposure
The following sections describe the time response of the camera using a sin-
gle frame (one-shot) command. As set out in the IIDC specification, this is
a software command that causes the camera to record and transmit a single
frame.
The following values apply only when the camera is idle and ready for use.
Full resolution must also be set.
Microcontroller-Sync is an internal signal. It is generated by the microcon-
troller to initiate a trigger. This can either be a direct trigger or a release for
ExSync if the camera is externally triggered.
End of exposure to first packet on the bus
After the exposure, the CCD or CMOS sensor is read out; some data is written
into a small FiFo buffer before being transmitted to the bus.
The time from the end of exposure to the start of transport on the bus is:
500 µs ± 62.5 µs
This time 'jitters' with the cycle time of the bus (125 µs).
3 wr F0F00614 00000000 Stop Free-run.
2 rd F0F00614 80000000 Check Iso_Enable mode (
Æ
Free-run).
1 rd F0F00614 00000000 This line is produced by SmartView.
Feature Value
One-shot
Æ
Microcontroller-Sync
≤
250 µs (processing time in the
microcontroller)
µC-Sync/ExSync
Æ
Integration-Start 8 µs
Table 59: Values for one-shot
# Read/
Write Address Value Description
Table 58: One-shot control: descriptions