BDM-610000083
Rev L
Chapter 3: Connecting the cpuModule
51
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 of 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.
Fan Power (CN12)
The fan power connector (
CN12
) is an optional fan connector which allows the system to power a fan for use
under high temperatures.
To utilize this connector, refer to the
section on page 65.
Table 32
Optional RTC Battery Input (CN13)
Pin
Signal
Function
1
BAT
RTC Battery Input
2
GND
Ground
WARNING
This optional RTC battery connector (
CN13
) should be left unconnected if the Utility Port
2.0 connector (
CN5
) has a battery connected.
Table 33
Fan Power, Switched (CN12)
Pin
Signal
Function
1
CPU_FAN_PWM
+5 Volts DC, Switched
2
GND
Ground
3
FAN_TACH
Fan Tachometer Input
Содержание cpuModules CMA34CR
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