Ampro Corporation P5X 用户手册

Little Board/P5x Technical Manual

 

2–7

Ampro installs option jumpers in default positions so that in most cases the Little Board/P5x
requires no special jumpering for standard AT operation. You can connect the power and
peripherals and operate it immediately.

Jumper-pin arrays are designated W1, W2, and so forth. Jumper pins are spaced 2 mm apart. A
square solder pad identifies pin 1 of each jumper array. Table 2– 2 is a summary of jumper use.
Factory settings are shown in the Default column. Some jumpers are set at the factory to configure
options that are not user-settable. These are indicated in the table. Do not change these settings.

W1

Serial 1 RS-485 100 Ohm Termination
ON=Terminated, OFF=Unterminated

OFF

W2

SCSI Termination Power
ON Connects Termination Power to SCSI Bus

OFF

W3, W4,

W5

Bus/CPU Speed Setting
(Factory settings - do not change)

As Req’d.

W6

CPU Voltage (Factory setting - do not change)
1/2=3.3V
2/3=2.5V

As Req’d

W7

Serial 3 RS-485 100 Ohm Termination (this is a
factory option. May not be implemented on your
board)
ON=Terminated, OFF=Unterminated

OFF

W8

Watchdog timer reset enable
ON=Enabled, OFF=Disabled

OFF

W9

System Bus Frequency Selection (Factory option -
do not change)
ON=60 MHz, OFF=66 MHz

OFF

W10

External BIOS Board Enable/Cable Connection
ON=Normal, OFF=External Cable

ON

W11

BIOS Flash EPROM Programming Power
ON=Programming enabled
OFF= Programming disabled

ON

W12

Compact Flash IDE Master/Slave
ON=Master, OFF=Slave

ON