Advantech 2006957006 5th Edition User Manual

Chapter 2  Installation

The PCM-9570/S 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. The standard PC/AT
BIOS will report an error or fail during power-on self-test (POST)
after a reset if the keyboard is not present. The PCM-9570/S’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 (power-on-self-test).

Next, you may want to install external switches to monitor and control
the PCM-9570/S. These features are optional - install them only if you
need them. The front panel connector (CN18) is an 8-pin male, dual
in-line header and provides connections for a speaker, hard disk
access indicator, watchdog output and an input switch for resetting
the card.

The PCM-9570/S can drive an 8 

Ω

 speaker at 0.5 watts. Make sure that

alternatives to this specification do not overload the card.

The front panel LED indicator for hard disk access is an active low
signal (24 mA sink rate).

When PCM-9570/S watchdog timer times out, the front panel pin 6
will output an active low pulse signal (25mA sink rate for 1 second).