551
SCKCR—System Clock Control Register
H'FF3B
System Control
Bit
Initial value
Read/Write
7
PSTOP
0
R/W
6
—
0
R/W
5
—
0
—
4
—
0
—
3
STCS
0
R/W
2
SCK2
0
R/W
1
SCK1
0
R/W
0
SCK0
0
R/W
0
0
1/1
1/2
1/4
1/8
1/16
1/32
System Clock Select 2 to 0
1
1
0
1
Setting prohibited
0
1
0
1
1
1
—
0 Specified multiplication factor is valid after transition
to software standby mode
Specified multiplication factor is valid immediately
after STC bits are rewritten
Frequency Multiplication Factor Switching Mode Select
1
0
1
ø Clock Output Control
ø output
Fixed high
ø output
Fixed high
Fixed high
Fixed high
High impedance
High impedance
PSTOP
Normal
Operation
Sleep Mode
Software
Standby Mode
Hardware
Standby Mode
Summary of Contents for H8S/2670
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