HD6432646 Hitachi, HD6432646 Datasheet - Page 995

• Manufacturer Part Number: HD6432646
• Description: (HD64F264x Series) 16-Bit Microcomputer
• Manufacturer: Hitachi

SCKCR—System Clock Control Register
Bit
Initial value
Read/Write
ø Clock Output Disable
DDR
PSTOP
Hardware standby mode
Software standby mode,
watch mode, and direct transition
Sleep mode and sub-sleep mode
High-speed mode, medium-speed
mode, and sub-active mode
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
3
0
Bus master in high-speed mode
Medium-speed clock is ø/2
Medium-speed clock is ø/4
Medium-speed clock is ø/8
Medium-speed clock is ø/16
Medium-speed clock is ø/32
—
H'FDE6
SCK2
1
0
High impedance
Fixed high
ø output
ø output
R/W
2
0
SCK1
R/W
1
0
1
1
High impedance
Fixed high
Fixed high
Fixed high
SCK0
R/W
0
0
System
961