AOpen AP53-JUMPER User Manual

Appendix A

Jumper and Connector Summary

CPU Frequency

CPU Frequency JP1 JP10

75 MHz 1-2, 3-4 1-2, 3-4

90 MHz 1-2 1-2, 3-4
100 MHz 3-4 * 1-2, 3-4 *
120 MHz 1-2 3-4, 5-6
133 MHz 3-4 3-4, 5-6
150 MHz 1-2 5-6, 7-8
166 MHz 3-4 5-6, 7-8

CPU Voltage

CPU Voltage JP11

3.45V 1-2 *

3.52V 3-4

* Default setting

A-1

Jumper and Connector Summary

Flash ROM Type

Flash ROM Type JP1301 JP1302

5V 1-2 * 1-2 *

12V 2-3 2-3

Super I/O Controller

Super I/O Controller JP8

SMC665 Enabled

SMC669 Enabled

ECP DMA Channel

Super I/O

Controller

SMC665 DRQ3/DACK3 1-2 * 1-2 *

SMC669 Auto-

CMOS

Function JP5

Normal 1-2 *
Clear CMOS 2-3

1-2

Disabled

Disabled

ECP/DMA

Channel JP6 JP7

DRQ1/DACK1 2-3 2-3

configured

2-3
1-2

2-3

Open Open

* Default setting

A-2