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15 Chapter 2
2.9 Keyboard and PS/2 mouse connector (CN9)
The board provides a keyboard connector that supports both a keyboard
and a PS/2 style mouse. In most cases, especially in embedded applica-
tions, 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-4386’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 sys-
tem halting under POST.
2.10 Power & HDD LED Connector (CN13)
Next, you may want to install external switches to monitor and control the
board. These features are optional: install them only if you need them.
The Power & HDD LED connector is 6-pin Wafer box connector. It pro-
vides connections for a power and hard disk access indicator.
2.10.1 Power & HDD LED Connector(CN10)
The HDD LED indicator for hard disk access is an active low signal (24
mA sink rate). Power supply activity LED indicator.
2.10.2 Power Reset button (S1)
Momentarily pressing the reset button will activate a reset. The switch
should be rated for 10 mA, 5 V.
2.11 Power connectors (CN1)
2.11.1 Main power connector, +3.3V, +5 V, +12 V (CN3)
Supplies main power to the PCM-4386 (+5 V), and to devices that require
+12 V.
2.11.2 Fan power supply connector (CN5)
Pr5V power supply to CPU cooling fan.
2.12 Audio interfaces (CN31)
2.12.1 Audio connector (CN31)
The board provides all major audio signals and it can be optional with
Line-in/Line-out/Speaker-out function by PCM-4386 daughterboard.