COM Express Interfaces
Figure 55: General Purpose I/O Loop-back Schematic
There are 4 GPI (General Purpose Inputs) and 4 GPO (General Purpose Outputs) pins in Figure 55 above.
The signals drive switch inputs such as Lamps, Relays, and Sensors.
GPI signals from a header are shown with protection diodes. The signals are connected for input to the COM Express Module.
GPO signals from the COM Express Module are shown buffered. The signals are connected to the header with protection diodes.
PICMG
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COM Express
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Carrier Board Design Guide Draft Rev. 2.0 / December 6, 2013 139/218
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