Advantech AIMB-221 User Manual download pdf (Page 15)

5 AIMB-201DS User Manual

Chapter 1 General Introduction

1.8 Jumper Settings

This section provides instructions on how to configure your motherboard by setting

the jumpers. It also includes the motherboards's default settings and your options for

each jumper.

1.8.1 How to Set Jumpers

You can configure your motherboard to match the needs of your application by set-

ting 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 set-

ting jumpers.

1.8.2 CMOS Clear (CMOS1)

The AIMB-201DS motherboard contains a jumper that can erase CMOS data and

reset the system BIOS information. Normally this jumper should be set with pins 1-2

closed. If you want to reset the CMOS data, set CMOS1 to 2-3 closed for just a few

seconds, and then move the jumper back to 1-2 closed. This procedure will reset the

CMOS to its default setting.

* Default

1 1

1.8.3 PSON1: ATX, AT Mode Selector

*Default

1 1

Table 1.1: CMOS1

Function Jumper Setting

*Keep CMOS data

Clear CMOS data

1-2 closed

2-3 closed

Linear brightness control

1-2 closed

PWM brightness control

2-3 closed

Table 1.2: PSON1: ATX, AT Mode Selector

Closed Pins Result

1-2 AT Mode

2-3* ATX Mode

AT Mode

1-2 closed

ATX Mode

2-3 closed

1 2 ... 10 11 12 13 14 15 16 17 18 19 20 ... 53 54

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Advantech AIMB-221 User Manual Page 15

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