Instruction manual

Marlin Technical ManualV.2.7.0
49
Camera interfaces
Control and video data signals
The inputs and outputs of the camera can be configured by software. The differ-
ent modes are described below.
Inputs
The optical coupler inverts all input signals. Polarity is controlled via the IO_IN-
P_CTRL1..2 register.
Triggers
All inputs configured as triggers are linked by AND. If two inputs are being used
as triggers, a high signal at the output of the block must be present on all inputs
in order to generate a trigger signal. The polarity for each signal can be set sep-
arately via the inverting inputs. The camera must be set to external triggering
to trigger image capture by the trigger signal.
Furthermore polarity of external triggering can be selected according to IIDC
V1.3x register 0xF0F00830.
Note

For a general description of the inputs and warnings see the
1394 Installation Manual, Chapter Marlin input description.
Figure 23: Input block diagram
Input
Polarity
selectable
via software
Input state
Opto-
Coupler
Input signal
Trigger-
AND
Input 2, if set to trigger