Advantech PCA-6188 User Manual download pdf (Page 27)

1.8 Jumper Settings

This section provides instructions on how to configure your single board

computer by setting the jumpers. It also includes the single board com-

puter's default settings and your options for each jumper.

1.8.1 How to set jumpers

You can configure your single board computer to match the needs of your

application by setting the jumpers. A jumper is a metal bridge that closes

an electrical circuit. It consists of two metal pins and a small metal clip

(often protected by a plastic cover) that slides over the pins to connect

them. To “close” (or turn ON) a jumper, you connect the pins with the

clip. To “open” (or turn OFF) a jumper, you remove the clip. Sometimes a

jumper consists of a set of three pins, labeled 1, 2, and 3. In this case you

connect either pins 1 and 2, or 2 and 3. A pair of needle-nose pliers may

be useful when setting jumpers.

1.8.2 CMOS clear (J1)

The PCA-6188 single board computer contains a jumper that can erase

CMOS data and reset the system BIOS information. Normally this

jumper should be set with pins 1-2 open. If you want to reset the CMOS

data, set J1 to 1-2 closed for just a few seconds, and then move the jumper

back to 1-2 open. This procedure will reset the CMOS to its default set-

ting.

1.8.3 Watchdog timer output (J2)

The PCA-6188 contains a watchdog timer that will reset the CPU or send

a signal to IRQ11 in the event the CPU stops processing. This feature

means the PCA-6188 will recover from a software failure or an EMI

problem. The J2 jumper settings control the outcome of what the com-

puter will do in the event the watchdog timer is tripped.

Table 1.3: CMOS (J1)

Function Jumper Setting

* Keep CMOS data

Clear CMOS data

* default setting

1 -2 open

1 - 2 closed

1 2 ... 22 23 24 25 26 27 28 29 30 31 32 ... 123 124

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Advantech PCA-6188 User Manual Page 27