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S3 (1~3) CPU clock select
CPU core frequency = External CPU clock (60~100 MHz) * CPU
frequency ratio (2~5.5X). The following table shows the available
CPU external clock configurations.
CAUTION: Improper settings may damage the CPU!
S
3
1 -
1
0
1
0
1
0
*
S
3
2 -
S
3
3 -
1
1
1
1
1
0
1
0
0
0
0
0
1 : ON
C
P
U
P
C
6
0
M
H
z
6
6
8 .
M
H
z
3
3
7
5
M
H
z
8
3
3 .
M
H
z
3
3
9
0
M
H
z
1
0
0
M
H
z
3
3
* default
0 : OFF
Chapter 2 Installation 23
I
B
u
s
3
0
M
H
z
4 .
M
H
z
3
0
M
H
z
3 .
M
H
z
3
0
M
H
z
3 .
M
H
z
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