h8s-2635 Renesas Electronics Corporation., h8s-2635 Datasheet - Page 1043

• Manufacturer Part Number: h8s-2635
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
• Manufacturer: Renesas Electronics Corporation.

23B.2.3 Low-Power Control Register (LPWRCR)
Note: * Bits 7 to 3 in LPWRCR are valid in the U-mask and W-mask versions, and H8S/2635
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 reset and when in hardware standby mode. It is not
initialized in software standby mode. The following describes bits 7 to 2. For details of other bits,
see sections 22A.2.2, 22B.2.2, Low-Power Control Register (LPWRCR).
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 subactive modes. The selected
operating mode after executing the SLEEP instruction is determined by the combination of other
control bits.
Note: * Always set high-speed mode when shifting to watch mode or subactive mode.
HD6432638UF, HD64F2638WF, HD6432638WF, HD64F2639UF, HD6432639UF, HD64F2639WF,
Bit 7
DTON
0
1
Group; they are reserved bits in all other versions.
See section 23A.2.3, Low-Power Control Register (LPWRCR), for more information.
Description
When the SLEEP instruction is executed in high-speed mode or medium-speed
mode, operation shifts to sleep mode, software standby mode, or watch mode * .
When the SLEEP instruction is executed in subactive mode, operation shifts
to subsleep mode or watch mode.
When the SLEEP instruction is executed in high-speed mode or medium-speed
mode, operation shifts directly to subactive mode * , or shifts to sleep mode or
software standby mode.
When the SLEEP instruction is executed in subactive mode, operation shifts directly
to high-speed mode, or shifts to subsleep mode.
Section 23B Power-Down Modes [HD64F2636UF, HD6432636UF, HD64F2638UF,
HD6432639WF, HD64F2630UF, HD6432630UF, HD64F2630WF, HD6432630WF]
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*
*
Rev. 6.00 Feb 22, 2005 page 983 of 1484
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*
¾
REJ09B0103-0600
(Initial value)