Power Management - Advantech SOM-6872 User Manual

Purpose: The standard module has no jumper at CN1, so BIOS settings are main-
tained without a RTC coin battery. If you need to restore BIOS default settings,
please follow the steps below:
1. Remove the Coin Battery
2. Put the jumper on CN1 pin1-2
3. Turn on the power supply
4. The System will boot up a few times
5. BIOS will be load default settings successfully
1.3.8

Power Management

1.3.8.1 Power Supply
Supports both ATX and AT power modes. The VSB is for optional suspend power if
the user does not require standby (suspend-to-RAM) support. The RTC Battery is
optional if keeping the time/date function is not required.
VCC: 8.5 ~ 20V

VSB: 4.75 ~ 5.25V (Suspend power)

RTC Battery Power: 2.0 ~ 3.3V

1.3.8.2 PWROK
Power OK uses the main power supply. A high value indicates that the power supply
is adequate. This signal can be used to hold off module startup and allow carrier
based FPGAs or other configurable devices time to be programmed.
1.3.8.3 Power Sequence
According to PICMG COM Express R3.0 specifications.
1.3.8.4 Wake Event
Supports various wake-up events enabling users to apply solution in different scenar-
ios.
Wake-on-LAN(WOL): Wake to S0 from S3/S4/S5

USB Wake: Wake to S0 from S3/S4

PCIe Device Wake: Depends on user inquiry and may need customized BIOS

LPC Wake: Depends on user inquiry and may need customized BIOS

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