Advantech PPC-L126 Bedienungsanleitung PDF herunterladen (Seite 18)

3.9 Watchdog timer configuration

An on-board watchdog timer

reduces the chance of

disruptions

which EMP (electro-magnetic pulse) interference

can cause. This is an invalu- able protective

device for

standalone or

unmanned applications.

Setup involves one

jumper

and

running the control

software

(refer to Appendix

A).

2.21.1

Watchdog timer action (pin 7-10 of JP1)

When the watchdog timer activates

(CPU processing has

come to

a halt), it can reset the system

or generate an

interrupt on IRQ11. This can be

set via setting JP1 as

shown

below:

Table

2.6: JP1

Watchdog timer action

Pins System reset* IRQ11

7-8 closed open

9-10 open closed

* Default

setting

3.10 USB connectors (CN19)

The PCM-9373

board

provides up to

four

USB (Universal

Serial Bus)

ports. This gives complete

Plug and

Play, and hot

attach/detach for up

127 external

devices.

The USB interfaces comply with USB

specification

Rev. 1.1, and are fuse protected.

The USB interface is accessed

through two 5 x 2-pin

flat-cable

connec- tors, CN19

(USB1, 2). You

will

need an

adapter cable if

you use

stan- dard USB connector. The

adapter

cable has

a 5 x 2-pin connector on one end and a

USB connector on the other.

The USB interfaces can be disabled in the system

BIOS setup.

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