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IO_MODE.md

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IO Modes

Activate an IO mode by

v4l2-ctl -c io_mode=<IO mode number>

The IO mode remains set until it is deactivated with

v4l2-ctl -c io_mode=0

Following you will find timing diagrams to illustrate the specific behavior of each mode.

In all modes you can activate a trigger mode as described in Trigger Modes.

Disabled (0)

In this mode the flash signal is deactivated and the trigger signal is active high.

Disabled

Flash active high (1)

In this mode the flash signal is active high and the trigger signal is active high.

Flash active high

Flash active low (2)

In this mode the flash signal is active low and the trigger signal is active high.

Flash active low

Trigger active low (3)

In this mode the flash signal is deactivated and the trigger signal is active low.

Trigger active low

Trigger active low and Flash active high (4)

In this mode the flash signal is active high and the trigger signal is active low.

Trigger active low and Flash active high

Trigger and Flash active low (5)

In this mode the flash signal is active low and the trigger signal is active low.

Trigger and Flash active low

Support for flash signal

In the table below you can find, which camera supports which flash signal in IO Mode (1)

cameras rev STREAM TRIGGER
IMX178 02 xvs H 110 ns H exp. time
IMX183 15 xvs H 110 ns H exp. time
IMX226 16 xvs H 110 ns H exp. time
IMX250 09 H 177 us H exp. time
IMX252 12 H 150 us H exp. time
IMX264 05 H 270 us H exp. time
IMX265 05 no H exp. time
IMX273 16 H 113 us H exp. time
IMX290 02 n.a. n.a.
IMX296 43 H 3.5 ms H exp. time
IMX297 43 H 3.5 ms H exp. time
IMX327 02 n.a. n.a.
IMX335 02 L 7.5 us n.a.
IMX392 08 143 us H exp. time
IMX412 05 xvs L 110 ns n.a.
IMX415 02 L 14 us n.a.
IMX462 01 n.a. n.a.
IMX565 03 H exp. time H exp. time
IMX566 03 H exp. time H exp. time
IMX567 03 H exp. time H exp. time
IMX568 04 H exp. time H exp. time
OV7281 01 no n.a.
OV9281 03 H exp. time n.a.