Manual

Camera interfaces

MARLIN Technical Manual V2.4.0

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.

0xF1000300 IO_INP_CTRL1 Presence_Inq [0] Indicates presence of this

feature (read only)

--- [1..6]

Polarity [7] 0: low active

1: high active

--- [8..10] Reserved

InputMode [11..15] Mode

see Table 19: Input routing

on page 53

--- [16..30] Reserved

PinState [31] RD: Current state of pin

0xF1000304 IO_INP_CTRL2 Same as

IO_INP_CTRL1

Table 18: Advanced register: Input control

• For inputs the PinState bit refers to the inverted out-

put 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 19: Input routing