Athena III User Manual Rev A.03
www.diamondsystems.com
Page
28
Signal Group Signal
Description
COM1-COM4
-
The signals on these pins are RS-232 level signals and may be
connected directly to RS-232 devices. The pinout of these
signals is designed to allow a 9-pin male IDC connector to be
crimped onto the corresponding ribbon cable wires to provide
the correct pinout for a PC serial port connector (DTE).
LPT1
-
The signals on these pins comprise a standard PC parallel
port. The pinout of these signals is designed to allow a 25-pin
female IDC connector to be crimped onto the corresponding
ribbon cable wires to provide the correct pinout for a PC
parallel port connector.
KYBD,
Mouse
-
PS/2 signals for keyboard and mouse. (Pins 2 and 6 on the
Mini-Din-6 PS/2 connectors are unused).
KB Clk
Clock pin; connects to pin 5 of the PS/2 connector.
KB/MS V-
Power pin; connects to pin 3 of the PS/2 connector.
KB Data
Data pin; connects to pin 1 of the PS/2 connector.
KB/MS V+
Power pin; connects to pin 4 of the PS/2 connector.
Utilities A
+5V Out
Switched power pin that is turned on and off with the ATX
power switch or with the +5V input.
Speaker Out
Referenced to +5V Out. Connect a speaker between this pin
and +5V Out.
SATA Drive
LED
Referenced to +5V Out. Does not require a series resistor.
Connect LED directly between this pin and +5V Out.
Power LED
Referenced to +5V Out. Does not require a series resistor.
Connect LED directly between this pin and +5V Out.
Utilities B
Reset-
Connection between this pin and Ground will generate a Reset
condition.
ATX Power
When ATX is enabled, a momentary contact between this pin
and ground causes the CPU to turn on, and a contact of 4
seconds or longer will generate a power shutdown.
Connector J18 mates with Diamond Systems cable number C-PRZ-01, which consists of a dual-ribbon-cable
assembly with industry-standard connectors at the user end. The SBC mating connector includes integral latches
for enhanced reliability. Each ribbon cable has 40 wires.
Connector type:
3M P50E-080P1-S1-EA connector or equivalent