8
2.2 Setting the CPU of ROCKY-558EV
•
CPU Clock Setting :
CPU Speed/Clock
JP3
7-8
JP3
9-10
JP3
11-12
55MHz
CLOSE CLOSE OPEN
60MHz
CLOSE OPEN
OPEN
66MHz
OPEN
OPEN
OPEN
75MHz
OPEN
CLOSE CLOSE
83MHz
CLOSE OPEN
CLOSE
•
CPU to Bus Multiple :
Multiplier
JP3
1-2
JP3
3-4
JP3
5-6
1.5 x
OPEN
OPEN
OPEN
2 x
CLOSE OPEN
OPEN
2.5 x
CLOSE CLOSE OPEN
3 x
OPEN
CLOSE OPEN
3.5 x
OPEN
OPEN
OPEN
4 x
CLOSE OPEN
CLOSE
4.5 x
CLOSE CLOSE CLOSE
CPU Frequency = CPU Clock x Multiplier for example
Pentium® 200MHz = 66MHz CPU Clock x 3
•
CPU Core Voltage Selection :
Please check the CPU Core Voltage before you install the
CPU. Right now new Intel MMX CPU is dual voltages for
core and I/O,the I/O is 3.3V but the core is 2.8V. This kind
of CPU design will enhance the low power consumption
capability. As for the general Pentium® CPU is one voltage for
I/O and Core - 3.3V,3.4V,or 3.5V
•
JP4
CPU Core Voltage Setting :