Compaq Extension 2.4 Objective

2 Introduction

Specification Rev 013

specific features rather than ca ring 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.

2.4 Objective

Consistent with the o bjective of the PICMG® COM Express™ Specification, the COM Expre ss™

Extension specification defines COM Express™ compliant modules at a level of detail sufficient to

allow interoperability between independent vendor modules and carrier boards.

Contents

Main Page Table of Contents Page 1 User Information 1.1 About This Document 1.2 Copyright Notice 1.3 Technical Support 1.4 Disclaimer 2 Introduction 2.1 COM Express Extension Specification 2.2 COM Express Extension Design Guide 2.3 COM Express Computer-On-Module Page 2.4 Objective 3 COM Express Module sizes 3.1 Overview - Module Size Figure - Overview three module sizes 3.1.1 Small Form Factor nano, COM Express Type 1 ecification 4 Signal Description 4.1 Graphic Signal Description 4.1.1 Table Graphic Signal Description - Row C for Pin-out Type 2 4 Signal Description 13 4.1.2 Table Graphic Signal Description - Row D for Pin-out Type 2 4 Signal Description 14 5 Hardware extensions Wide Range Input Power for basic, extended and micro form factor 5.1.1 Wide Range Input Power for nano SmallFormFactor (SFF) 5.2 GPIO General Purpose I/O Recommended Use 5.2.1 Alternative GPIO use for SDIO Interface SDIO Pin description 5.3 Thermal Control 6 Software extensions 6.1 TPM support 6.2 Smart Battery BIOS support 6.3 Legacy Super I/O support in BIOS 6.4 CMOS backup in BIOS 6.4.1 Console redirection in BIOS 6.4.2 User editor for default settings 7 Apendix A: PC Architecture Information 7.1 Buses 7.1.1 ISA, Standard PS/2 Connectors 7.1.2 PCI 7.2 General PC Architecture 7.3 Ports 7.3.1 RS-232 Serial 7.3.2 Serial ATA 7.3.3 USB 7.4 Programming 8 APPENDIX B: DOCUMENT-REVISION HISTORY 24 8 APPENDIX B: DOCUMENT-REVISION HISTORY