32
CMA34CR cpuModule
BDM-610000083
Rev L
Speaker
A speaker output is available on pins 1 and 2 of the Utility Port 2.0 connector. These outputs are controlled by a
transistor to supply 0.1 W of power to an external speaker. The external speaker should have 8 Ohm impedance
and be connected between pins 1 and 2.
System Reset
Pin 3 of the Utility Port 2.0 connector allows connection of an external push-button to manually reset the system.
The push-button should be normally open, and connect to ground when pushed. The type of reset generated by
this button can be set in the BIOS configuration utility.
Soft Power Button
Pin 5 of the Utility Port 2.0 connector allows connection of an external push-button to send a soft power signal
to the system. The push-button should be normally open, and connect to ground when pushed. For more
information on the modes of the Soft Power Button, refer to the
section in Chapter 4,
.
Battery
Pin 9 of the Utility Port 2.0 connector 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.
WARNING
The optional RTC battery input connector (
CN13
) should be left unconnected if the
multi-function connector (
CN5
) has a battery connected to pin 9.
Содержание cpuModules CMA34CR
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