Specifications

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EPC-30 Hardware Reference
Page 45
Miscellaneous Functions
Keyboard controller
A PC-compatible keyboard controller is provided as part of the
R380EX. Connection to it is made with a 6-pin mini-DIN circular
connector, the type used in PS/2 designs and in other RadiSys CPU
designs. These signals are duplicated in a 10-pin shrouded stake
pin header. The keyboard may be attached there through an adaptor
instead of at the mini-DIN connector.
Power to the keyboard is fused to meet safety agency requirements
(e.g., UL1950).
Battery
A built-in socketed coin cell battery is provided for backup of the
real-time clock and CMOS RAM which is part of the R380EX.
This cell is installed at the factory, and is user-replaceable. The cell
used is a 3V lithium coin cell, Duracell part number BR2450
(600mA-hour) or equivalent.
Speaker
A small speaker is installed on the PCB and connected to the
standard PC "beep" generation circuit. The speaker is directly
driven by the R380EX. The R380EX includes a routing feature
which allows combining of the normal PC speaker signal with the
PCMCIA speaker signal, thus eliminating the need for a second
speaker.
LEDs
The following LED and LED interfaces are provided:
HDD access LED signal - an LED can be connected to monitor the
hard drive ~HACT signal. The LED will illuminate when the drive
is accessed. This signal is present on the misc. expansion header.
Current is limited by a 510Ω resistor.
Power on LED signal - a signal to drive an LED when power is
applied to the system. This signal is present on the misc. expansion
header. Current is limited by a 510Ω resistor.
Reset Signal
A reset signal is provided on the board, in the miscellaneous
expansion header, to provide a reset input to the system.