Table of Contents
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16.2 Power Management Signals ..........................................................79
16.3 Watch Dog ....................................................................................81
16.4 Speaker .........................................................................................81
16.5 RTC Battery ...................................................................................82
16.6 GPIO..............................................................................................83
17
Thermal Signals ...................................................85
18
Power and Reset..................................................86
18.1 VCC12V .........................................................................................86
18.2 VCC5V_STB....................................................................................86
18.3 VCC_RTC .......................................................................................86
18.4 Copper Trace Size and Current Capacity .........................................86
18.5 Reset Signals Definitions................................................................87
19
BIOS Consideration..............................................88
19.1 Legacy versus Legacy Free .............................................................88
19.2 Carrier Super I/O Support...............................................................88
20
Mechanical Consideration ...................................89
20.1 Form Factor...................................................................................89
20.2 Heat Spreader ...............................................................................90
21
Layout Guidelines ................................................91
21.1 PCB Stack-ups................................................................................91
COM Express Carrier Type 2
Design Guide
Page 7 of 103
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