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BDM-610000050 Rev A Chapter 3: Connecting the cpuModule 45
Power Supplies and VIO
+5 V — +5 V supply connected to PC/104 bus and auxiliary power connector (CN3) +5 V supplies.
+12 V — +12 V supply connected to PC/104 bus and auxiliary power connector (CN3) +12 V supplies.
–12 V — –12 V supply connected to PC/104 bus and auxiliary power connector (CN3) –12 V supplies.
+3.3 V — The +3.3 V pins on the PC/104-Plus (PCI) connector may be supplied by the onboard +3.3V power
supply, however this is not the the default configuration. To supply +3.3V to PC/104-Plus or PCI-104
expansion cards via these pins, solder blob B3 must be modified. For more information refer toTable 58 on
page 82.
VIO — This signal is typically the I/O power to the bus drivers on a PCI bus card. Signaling level is
determined by solder blob B1. The default is +3.3 V. Refer to Table 58 on page 82 for solder blob settings.
ATX Power Management Signals (optional)
If an ATX power supply is connected to the system, the following signals listed below may be used to wake the
system from low power modes. For more information on these signals, refer to the Power Management section
on page 66.
+5V_STDBY — Some low power modes require that +5 V standby power is applied to the cpuModule
during the wake event. This signal is an input to the CPU.
PME# — Power Management Event input
PSON# — This is an active low open-drain output used to turn the power supply on when the system is
exiting a low power state.
Note Use of these signals will require board customization. For more information, contact the factory.