External Power Management (CN12)
An external power management connector (CN12) is available for external devices to wake the system from low power states. Some low power modes require that +5 V standby power is applied to the cpuModule during the wake event.
For more information on power management, including a description of the board’s supported wake options, refer to the Power Management section on page 66.
Table 30 External Power Managment (CN12)
Pin | Signal | Function |
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|
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1 | +5V_STDBY | +5 V standby Power |
|
|
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2 | GND | Ground |
|
|
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2 | PME# | Powerment Management Event input |
|
|
|
Optional RTC Battery Input (CN13)
The optional RTC battery input is the connection for an external backup battery. This battery is used by the cpuModule when system power is removed in order to preserve the date and time in the real time clock.
Connecting a battery is only required to maintain time when power is completely removed from the cpuModule. A battery is not required for board operation.
Table 31 Optional RTC Battery Input (CN13)
Pin | Signal | Function |
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|
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1 | BAT | RTC Battery Input |
|
|
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2 | GND | Ground |
|
|
|
WARNING This optional RTC battery connector (CN13) should be left unconnected if the utility port connector (CN5) has a battery connected.
Fan Power, +5 V (CN14)
If a fan is required to cool the cpuModule, it can be wired to CN14, which provides a continuous connection to +5 V and ground.
Table 32 Fan Power, +5 V (CN14)
Pin | Signal | Function |
|
|
|
1 | +5V | +5 Volts DC |
|
|
|
2 | GND | Ground |
|
|
|
Note To utilize the thermal fan mode feature in the BIOS, the fan must be connected to CN15
Chapter 3: Connecting the cpuModule 47 |
