User Guide

2-14 Chapter 2: Hardware information
2.7 Switches and jumpers
2.7.1 Switches
The following figure shows the location and default settings of the DIP
switches on the motherboard.
PRL-DL
®
PRL-DL DIP Switches
SW2
1. Reserved
2. Reserved
3. Reserved
4. Reserved
5. Frequency Multiple
6. Frequency Multiple
7. Frequency Multiple
8. Frequency Multiple
ON
12345678
OFF
ON
Keep the default settings for stable system operation.
1. CPU External Frequency Selection (SW1 & JFSB1)
This option tells the clock generator which frequency to send to the CPU and
SDRAM; and sets the CPU’s External frequency. (The BUS Clock multiplied
by the Frequency Multiple equals the CPU’s Internal frequency or the
advertised CPU speed.)
Both the dip switch and jumper must be set together.
PRL-DL
®
PRL-DL CPU
External Frequency Selection
(Defaul
t)
533MH
z
400MHz
SW1
JFSB1
533MH
z
400MHz
12 32
ON
12345
ON
12345