861
Bits 2 to 0—System clock select (SCK2 to SCK0): These bits select the bus master clock in
high-speed mode, medium-speed mode, and sub-active mode.
Set SCK2 to SCK0 all to 0 when shifting to operation in watch mode or sub-active mode.
Bit 2
Bit 1
Bit 0
SCK2
SCK1
SCK0
Description
0
0
0
Bus master in high-speed mode
(Initial value)
1
Medium-speed clock is ø/2
1
0
Medium-speed clock is ø/4
1
Medium-speed clock is ø/8
1
0
0
Medium-speed clock is ø/16
1
Medium-speed clock is ø/32
1
—
—
24.2.3
Low-Power Control Register (LPWRCR)
7
DTON
0
R/W
6
LSON
0
R/W
5
NESEL
0
R/W
4
SUBSTP
0
R/W
3
RFCUT
0
R/W
0
STC0
0
R/W
2
—
0
R/W
1
STC1
0
R/W
Bit
Initial value
R/W
:
:
:
The LPWRCR is an 8-bit read/write register that controls the low power dissipation modes.
The LPWRCR is initialized to H'00 at a power-on reset and when in hardware standby mode. It is
not initialized at a manual reset or when in software standby mode. The following describes bits 7
to 2. For details of other bits, see Section 23.2.2, Low-Power Control Register.
Bit 7—Direct Transition ON Flag (DTON): When shifting to low power dissipation mode by
executing the SLEEP instruction, this bit specifies whether or not to make a direct transition
between high-speed mode or medium-speed mode and the sub-active modes. The selected
operating mode after executing the SLEEP instruction is determined by the combination of other
control bits.
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 ...