Compaq Extension manual Objective

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2 Introduction

specific features rather than caring for a CPU board design. The OEM also benefits from a wide choice of modules providing a scalable range of price and performance upgrade options.

2.4Objective

Consistent with the objective of the PICMG® COM Exp ress™ Specification, the COM Express™ Extension specification defines COM Express™ compli ant modules at a level of detail sufficient to allow interoperability between independent vendor modules and carrier boards.

Copyright © COM Express™ Extension

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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 Table Graphic Signal Description Row C for Pin- out Type Signal DescriptionGraphic Signal Description 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 ControlTPM support Smart Battery Bios supportSoftware extensions 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