h8s-2646 Renesas Electronics Corporation., h8s-2646 Datasheet - Page 1003

• Manufacturer Part Number: h8s-2646
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
• Manufacturer: Renesas Electronics Corporation.

SCKCR—System Clock Control Register
Bit
Initial value
Read/Write
DDR
PSTOP
Hardware standby mode
Software standby mode,
watch mode, and direct transition
Sleep mode and subsleep mode
High-speed mode, medium-speed
mode, and subactive mode
Clock Output Disable
PSTOP
R/W
7
0
Frequency Multiplication Factor Switching Mode Select
0 Specified multiplication factor is valid after transition to software
1 Specified multiplication factor is valid immediately after STC
—
—
6
0
standby mode, watch mode, or subactive mode
bits are rewritten
—
—
5
0
System Clock Select
0
1
—
—
4
0
0
—
High impedance
High impedance
High impedance
High impedance
0
1
0
1
—
0
1
0
1
0
1
STCS
R/W
Rev. 5.00 Sep 22, 2005 page 977 of 1136
3
0
Bus master in high-speed mode
Medium-speed clock is /2
Medium-speed clock is /4
Medium-speed clock is /8
Medium-speed clock is /16
Medium-speed clock is /32
—
H'FDE6
SCK2
1
0
High impedance
Fixed high
R/W
Appendix B Internal I/O Register
2
0
output
output
SCK1
R/W
1
0
REJ09B0257-0500
1
1
High impedance
Fixed high
Fixed high
Fixed high
SCK0
R/W
0
0
System