Advantech SOM-ETX Design Guide
5.14.8 External SMI Interrupt
Device
SOM-ETX
EXTSMI#
Carryboard
Figure 5-48 External SMI Interrupt Connections
The active-low SMI input allows external devices to signal a system-management
event. Response to this signal depends upon system software.
The implementation details for this feature can be different between SOM-ETX
modules. Refer to the individual SOM-ETX user’s guide for details.
5.14.9 Wake on Ring
RINGWAKE# is an active-low output from the serial port to SOM-ETX module. Wake
the system up when a telephone ring signal is detected.
1K
4.7u
MMBT3904
2
3
1
10K
MMBD2837LT1
2
1
3
2.2K
SOM-ETX
RINGWAKE#
NRI#2
NRI#1
RINGWAKE# pull-up resister is already
on SOM-ETX modules
Figure 5-49 Wake on Ring Connections(two Comport)
Chapter 5 Carrier Board Design Guidelines
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