Instruction manual
Marlin Technical ManualV.2.7.0
50
Camera interfaces
Input/output pin control
All input and output signals running over the camera I/O connector are con-
trolled by an advanced feature register.
IO_INP_CTRL 1-2
The Polarity flag determines whether the input is low active (0) or high active
(1). The input mode can be seen in the following table. The PinState flag is used
to query the current status of the input.
Register Name Field Bit Description
0xF1000300 IO_INP_CTRL1 Presence_Inq [0] Indicates presence of this fea-
ture (read only)
--- [1..6]
Polarity [7] 0: low active
1: high active
--- [8..10] Reserved
InputMode [11..15] Mode
see Table 18: Input routing on
page 50
--- [16..30] Reserved
PinState [31] RD: Current state of pin
0xF1000304 IO_INP_CTRL2 Same as IO_INP_C-
TRL1
Table 17: Advanced register: Input control
• For inputs the PinState bit refers to the inverted output
side of the optical coupler. This signals that an open
input sets the PinState bit to 1.
ID Mode Default
0x00 Off
0x01 Reserved
0x02 Trigger input
Input 1
0x03 Reserved
0x06..0x0F Reserved
0x10..0x1F Reserved
Table 18: Input routing