P5SJ-A
User’s Manual
4:
Reference Information – 4.4
CPU Jumper Settings
Function
Jumper
Settings
External
JP12–JP15
50MHz
12
:2-3,
13
:2-3,
15
:2-3
Speed
55MHz
12
:2-3,
13
:2-3,
15
:1-2
60MHz
12
:2-3,
13
:1-2,
15
:2-3
(D)
66.6MHz
12
:1-2,
13
:2-3,
15
:2-3
75MHz
12
:2-3,
13
:1-2,
15
:1-2
83.3MHz
12
:1-2,
13
:2-3,
15
:1-2
*
The 2-3 setting for
JP14
sets the PCI bus clock to 32MHz for all speeds.
The 1-2 setting sets it to one half the external clock speed.
Internal Clock JP18
1.5x
BF0
:1-2
BF1
: 1-2
Factor
(D)
2.0x
BF0
:2-3
BF1
: 1-2
2.5x
BF0
:2-3
BF1
: 2-3
3.0x
BF0
:1-2
BF1
: 2-3
3.5x
BF0
:1-2
BF1
: 1-2
4.0x
BF0
:2-3
BF1
: 1-2
BF2
: 2-3
I/O Voltage
JP6
(D)
STD 3.3V
1-2
VRE 3.52V
3-4
Core Voltage JP22
1-2
3-4
5-6
7-8
On= Cap On
(D)
2.14V
On
Off= Cap Off
2.54V
On
On
2.84V
On
2.94V
On
On
3.24V
On
On
3.34V
On
On
On
3.54V
On
On
On
On
