Table of Contents

				Table of Contents
Table of Contents
1	User Information			5
	1.1	About This Document		5
	1.2	Copyright Notice		5
	1.3	Technical Support		5
	1.4	Disclaimer		5
2	Introduction			6
	2.1	COM Express™ Extension Specification		6
	2.2	COM Express™ Design Guide		6
	2.3	COM Express™ Computer-On-Module		6
	2.4	Objective		8
3	COM Express™ Module sizes			9
	3.1	Overview - Module Size		9
	3.1.1	Figure - Overview – three module sizes		10
	3.1.2	Small Form Factor nano, COM Express™ Type 1	................................................ 10
Figure 3 – Small Form Factor nano				11
4	Signal Description			12
	4.1	Graphic Signal Description		12
	4.1.1	Table – Graphic Signal Description - Row C for Pin- out Type 2		................................. 12
	4.1.2	Table – Graphic Signal Description - Row D for Pin- out Type 2		................................. 13
5	Hardware extensions			15
	5.1	Wide Range Input Power		15
	5.1.1	Wide Range Input Power for nano SFF		15
	5.2	GPIO General Purpose I/O Recommended Use		16
	5.2.1	Alternative GPIO use for SDIO Interface		17
SDIO Pin description				17
	5.3	Thermal Control		18
6	Software extensions			19
	6.1	TPM support		19
	6.2	Smart Battery BIOS support		19
	6.3	Legacy Super I/O support in BIOS		20
	6.4	CMOS backup in BIOS		20
	6.4.1	Console redirection in BIOS		20

Specification Rev 012

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Compaq Extension manual Table of Contents