h8s-2635 Renesas Electronics Corporation., h8s-2635 Datasheet - Page 1044

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

Section 23B Power-Down Modes [HD64F2636UF, HD6432636UF, HD64F2638UF,
HD6432638UF, HD64F2638WF, HD6432638WF, HD64F2639UF, HD6432639UF, HD64F2639WF,
HD6432639WF, HD64F2630UF, HD6432630UF, HD64F2630WF, HD6432630WF]
Bit 6—Low-Speed ON Flag (LSON): When shifting to low power dissipation mode by executing
the SLEEP instruction, this bit specifies the operating mode, in combination with other control
bits. This bit also controls whether to shift to high-speed mode or subactive mode when watch
mode is cancelled.
Note: * Always set high-speed mode when shifting to watch mode or subactive mode.
Bit 5—Noise Elimination Sampling Frequency Select (NESEL): This bit selects the sampling
frequency of the subclock ( SUB) generated by the subclock oscillator is sampled by the clock ( )
generated by the system clock oscillator. Set this bit to 0 when =5MHz or more. This setting is
disabled in subactive mode, subsleep mode, and watch mode.
Bit 4—Subclock Enable (SUBSTP): This bit enables/disables subclock generation.
Rev. 6.00 Feb 22, 2005 page 984 of 1484
REJ09B0103-0600
Bit 6
LSON
0
1
Bit 5
NESEL
0
1
Bit 4
SUBSTP Description
0
1
Description
Description
Sampling using 1/32
Sampling using 1/4
Enables subclock generation
Disables subclock generation
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 watch
mode or shifts directly to high-speed mode.
Operation shifts to high-speed mode when watch mode is cancelled. (Initial value)
When the SLEEP instruction is executed in high-speed mode, operation shifts to
watch mode or subactive mode.
When the SLEEP instruction is executed in subactive mode, operation shifts to
subsleep mode or watch mode.
Operation shifts to subactive mode when watch mode is cancelled.
(Initial value)
(Initial value)