Compaq Extension manual Gpio General Purpose I/O Recommended Use, GPO0

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5 Hardware extensions

5.2GPIO 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

 

 

 

 

 

 

 

 

Copyright © COM Express™ Extension

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Specification Rev 013

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Contents COM Express Extension Specification This page intentionally left blank Table of Contents 2 PCI User Information About This DocumentCopyright Notice Technical SupportCOM Express Extension Specification IntroductionCOM Express Extension Design Guide COM Express Computer-On-ModuleCopyright COM Express Extension Specification Rev Objective COM Express Module sizes Overview Module SizeFigure Overview three module sizes Small Form Factor nano, COM Express TypeFigure Small Form Factor nano Graphic Signal Description Signal DescriptionTable Graphic Signal Description Row C for Pin- out Type Table Graphic Signal Description Row D for Pin- out Type Tmds Clock + Tmds Clock Wide Range Input Power for nano SmallFormFactor SFF Hardware extensionsGpio General Purpose I/O Recommended Use GPO0Alternative Gpio use for Sdio Interface Sdio Pin descriptionElectrical characteristics Thermal ControlSoftware extensions Smart Battery Bios supportTPM support Legacy Super I/O support in Bios Cmos backup in BiosConsole redirection in Bios User editor for default settings1 ISA, Standard PS/2 Connectors Apendix a PC Architecture InformationBuses General PC ArchitecturePorts 1 RS-232 SerialSerial ATA 3 USBProgramming Appendix B DOCUMENT-REVISION History