Chapter 3
Clock Generator
Control Registers III - 5
3.2.3 Clock Control Registers
■ Clock Control Register (CKCTR: 0x00008280) [8, 16-bit Access Register]
bp 1514131211109876543210
Flag --------
SCK
1
SCK
0
IOCK
1
IOCK
0
CGE
CK1
CGE
CK0
MCK
1
MCK
0
At reset0000000010110011
AccessRRRRRRRRR/WR/WR/WR/WR/WR/WR/WR/W
bp Flag Description Set condition
15-8 - - -
7-6
SCK1
SCK0
Reserved Always set “10”.
5-4
IOCK1
IOCK0
Set the frequency of IOCLK
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
3-2
CGECK1
CGECK0
Reserved Always set “00”.
1-0
MCK1
MCK0
Set the frequency of MCLK
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