Kontron ETXexpress-AI - Manual (Page 67)

Kontron ETXexpress-AI User’s Guide
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Table 16: ATX Mode
State PWRBTN# PWR_OK V5_StdBy PS_ON# VCC
G3 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:
In single supply mode the module starts automatically when VCC power is
connected and Power Good input is open or at high-level (internal PU to
3.3V). PS_ON# is not used in single supply mode.
To power on the module from the S5 state, press the power button or reconnect
VCC.
Table 17: Single Supply Mode
State PWRBTN PWR_OK V5_StdBy VCC
G3 x x x 0
G3 -> 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.
4.4.11 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
The implementation of this subsystem complies with the COM Express™
specification. For additional implementation information, refer to the PICMG
COM Express™ Design Guide
on the PICMG website.