Point Grey Flea3 USB 3.0 Technical Reference 4 Input/Output Control
4 Input/Output Control
4.1 General Purpose Input/Output (GPIO)
The camera has an 8-pin GPIO connector on the back of the case; refer to the diagram below for wire color-coding.
The connector is a Hirose HR25 8 pin connector (Mfg P/N: HR25-7TR-8SA). Male connectors (Mfg P/N: HR25-7TP-8P)
can be purchased from Digikey (P/N: HR702-ND).
Table 4.1: GPIO pin assignments (as shown looking at rear of camera)
Diagram Pin Function Description
1 I0 Opto-isolated input (default Trigger in)
2 O1 Opto-isolated output
3 IO2 Input/Output/serial transmit (TX)
4 IO3 Input/Output/serial receive (RX)
5 GND Ground for bi-directional IO, V
EXT
, +3.3 V pins
6 OPTO_GND Ground for opto-isolated IO pins
7 V
EXT
Allows the camera to be powered externally
8 +3.3 V Power external circuitry up to 150 mA
Power can be provided through the GPIO interface. The camera selects whichever power source is supplying a higher
voltage.
Point Grey sells a 12 V wall-mount power supply equipped with a HR25 8-pin GPIO wiring harness for connecting to
the camera (Part No. ACC-01-9006). For more information, see the miscellaneous product accessories page on the
Point Grey website.
For details on GPIO circuits, see GPIO Electrical Characteristics on page 59.
4.2 GPIO Modes
4.2.1 GPIO Mode 0: Input
When a GPIO pin is put into GPIOMode 0 it is configured to accept external trigger signals. See Serial Communication
on page 51.
4.2.2 GPIO Mode 1: Output
When a GPIO pin is put into GPIOMode 1 it is configured to send output signals.
Do not connect power to a pin configured as an output (effectively
connecting two outputs to each other). Doing so can cause damage to
camera electronics.
Revised 9/27/2012
Copyright ©2011-2012 Point Grey Research Inc.
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