860
24.2.2
System Clock Control Register (SCKCR)
7
PSTOP
0
R/W
6
—
0
—
5
—
0
—
4
—
0
—
3
STCS
0
R/W
0
SCK0
0
R/W
2
SCK2
0
R/W
1
SCK1
0
R/W
Bit
Initial value
R/W
:
:
:
SCKCR is an 8-bit readable/writable register that performs ø clock output control, selection of
operation when the PLL circuit frequency multiplication factor is changed, and medium-speed
mode control.
SCKCR is initialized to H'00 by a reset and in hardware standby mode. It is not initialized in
software standby mode.
Bit 7—ø Clock Output Disable (PSTOP): In combination with the DDR of the applicable port,
this bit controls ø output. See Section 24.12, ø Clock Output Disabling Function for details.
Description
Bit 7
PSTOP
High-Speed Mode,
Medium-Speed Mode,
Sub-Active Mode
Sleep Mode,
Sub-Sleep Mode
Software Standby
Mode, Watch Mode
Hardware Standby
Mode
0
ø output (initial value)
ø output
Fixed high
High impedance
1
Fixed high
Fixed high
Fixed high
High impedance
Bits 6 and 4—Reserved: These bits are always read as 0 and cannot be modified.
Bit 3—Frequency Multiplication Factor Switching Mode Select (STCS): Selects the operation
when the PLL circuit frequency multiplication factor is changed.
Bit 3
STCS
Description
0
Specified multiplication factor is valid after transition to software standby mode, watch
mode, or subactive mode
(Initial value)
1
Specified multiplication factor is valid immediately after STC bits are rewritten
Содержание H8S/2631
Страница 28: ...xviii Appendix G Package Dimensions 1154 ...
Страница 341: ...316 Transfer SAR or DAR DAR or SAR Block area First block Nth block Figure 9 8 Memory Mapping in Block Transfer Mode ...
Страница 918: ...905 ø DREQ0 DREQ1 tDRQS tDRQH Figure 25 19 DMAC DREQ Input Timing ...
Страница 955: ...943 A 2 Instruction Codes Table A 2 shows the instruction codes ...