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3.2.3
Clock Control Registers
Clock Control Register (CKCTR: 0x00008280) [8, 16-bit Access Register]
bp
15
14
Flag
-
-
At reset
0
0
Access
R
R
bp
Flag
Description
15-8
-
-
SCK1
7-6
Reserved
SCK0
IOCK1
5-4
Set the frequency of IOCLK
IOCK0
CGECK1
3-2
Reserved
CGECK0
MCK1
1-0
Set the frequency of MCLK
MCK0
13
12
11
10
-
-
-
-
0
0
0
0
R
R
R
R
9
8
7
6
SCK
SCK
IOCK
-
-
1
0
0
0
1
0
R
R
R/W
R/W
R/W
Set condition
-
Always set "10".
00: Setting prohibited
01: 1/8 of the clock selected by the PCNT register
10: 1/4 of the clock selected by the PCNT register
11: 1/2 of the clock selected by the PCNT register
Always set "00".
00: Setting prohibited
01: 1/4 of the clock selected by the PCNT register
10: 1/2 of the clock selected by the PCNT register
11: 1/1 of the clock selected by the PCNT register
5
4
3
2
IOCK
CGE
MCK
CGE
1
0
CK1
CK0
1
1
0
0
R/W
R/W
R/W
R/W
Control Registers
Chapter 3
Clock Generator
1
0
MCK
1
0
1
1
R/W
III - 5
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