Kontron COMe-cOHXX - Manual (Page 50)

Kontron COMe-cOH2/COMe-cOH6 User’s Guide
www.kontron.com
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State PWRBTN# PWR_OK V5_StdBy PS_ON# VCC
S3 x x 0V x 0V
S5 high low 5V high 0V
S5 -> S0 PWRBTN Event low -> high 5V high -> low 0 V-> VCC
S0 high high 5V low VCC
Single Supply Mode:
Main power is provided on the COM Express VCC_12V pins. Standby power, if
needed, is also provided on the VCC_12V pins. The VCC_5V_SBY pins may be
floating or may be tied to a 5V source on the Carrier. RTC power is provided
on the VCC_RTC pins
To power on the module from the S5 state, press the power button or reconnect
VCC.
Table 13: Single Supply Mode
State PWRBTN# PWR_OK V5_StdBy VCC
S3 x x x 0
S3 -> S0 high open / high x connecting VCC
S5 high open / high x VCC
S5 -> S0 PWRBTN Event open / high x reconnecting
VCC
NOTES: 1) Columns marked “x” are not relevant for the specified power
state.
2) All ground pins have to be tied to the ground plane of the carrier
board.
4.1.16 Miscellaneous Circuits
Speaker
The implementation of this subsystem complies with the COM Express®
Specification. For additional implementation information, refer to the PICMG
COM Express® Design Guide.
Battery