Compaq COM Express Extension - Manual (Page 16)

5 Hardware extensions
Copyright © COM Express™ Extension
Specification Rev 013
16
5.2 GPIO General Purpose I/O Recommended Use
In general, GPIOs are defined for specific customers. Any generic GPIOs should be be set as well in
order to assure compatibility of various COM Express™ compliant modules and carrier boards.
Pin Description Recomended Use Function Comment
GPI0 General Purpose Input LID Button Power Management Event Please see Board Specification
GPI1 General Purpose Input
GPI2 General Purpose Input
GPI3 General Purpose Input
GPO0 General Purpose Output Fan Control TTL output for external fan Please see Board Specification
GPO1 General Purpose Output
GPO2 General Purpose Output
GPO3 General Purpose Output