Kontron ETXexpress-AI User Manual
Page 67

Kontron ETXexpress-AI User’s Guide
62
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.