Installations
11
2. Installations
2.1 CPU
installation
There are four jumpers are used for CPU installation
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JP4 CPU external frequency selector
External frequency
PCI bus
JP4 short pins
50MHz
25MHz
1-2, 3-4, 5-6
55 MHz
27.5 MHz
1-2, 5-6
60 MHz
30 MHz
3-4, 5-6
66.6 MHz
33.3 MHz
1-2, 3-4
75 MHz
37.5 MHz
5-6
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JP11/12 CPU voltage selector
JP11 JP12
Short open
short
open
Vio Vcore
5-6, 7-8
1-2, 3-4 3-4
1-2, 5-6
3.3V 3.3V
1-2, 3-4
5-6, 7-8 1-2
3,4 5,6
3.3V 2.8V
1-2, 3-4
5-6, 7-8 5-6
1-2, 3-4
3.3V 3.5V
1-2, 3-4
5-6, 7-8 None
1-2, 3,4, 5-6 3.3V 2.2V
Installations
12
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Pentium CPU installation
CPU type
Bus/core
freq. ratio
JP2
External
clock
JP4
Vio
JP11
Vcore
JP12
Pentium P54C-90
Pentium P54C-100
Pentium P54C-120
Pentium P54C-133
Pentium P54C-150
Pentium P54C-166
Pentium P54C-200
Pentium P55C-150
Pentium P55C-166
Pentium P55C-200
Pentium P55C-233
