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PCA-9372 User’s Manual 16
2.12 Keyboard and PS/2 mouse connector (CN12)
The PCM-9372 board provides a keyboard connector that supports both a
keyboard and a PS/2 style mouse. In most cases, especially in embedded
applications, a keyboard is not used. If the keyboard is not present, the
standard PC/AT BIOS will report an error or fail during power-on self-
test (POST) after a reset. The PCM-9372’s BIOS standard setup menu
allows you to select “All, But Keyboard” under the “Halt On” selection.
This allows no-keyboard operation in embedded system applications,
without the system halting under POST.
2.13 Power & HDD LED, Reset Button Connector
(CN11, S1)
Next, you may want to install external switches to monitor and control the
PCM-9372. These features are optional: install them only if you need
them. The Power & HDD LED connector (CN11) is 6-pin Wafer box con-
nector. It provides connections for a power and hard disk access indicator.
2.13.1 Power & HDD LED (CN11)
The HDD LED indicator for hard disk access is an active low signal (24
mA sink rate). Power supply activity LED indicator.
2.13.2 Reset switch (S1)
If you install a reset switch, it should be an open single pole switch.
Momentarily pressing the switch will activate a reset. The switch should
be rated for 10 mA, 5 V.
2.14 Power connectors (CN9, CN10, CN22)
2.14.1 Peripheral power connector, -5 V, -12 V (CN10)
Supplies secondary power to devices that require -5 V and -12 V.
2.14.2 Main power connector, +5 V, +12 V (CN9)
Supplies main power to the PCM-9372 (+5 V), and to devices that require
+12 V.
2.14.3 CPU Fan power supply connector (CN22)
Provides power supply to CPU cooling fan. Only present when +5 V and
+12 V power is supplied to the board.