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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
Copyright © COM Express™ Extension
Specification Rev 012
iii
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