h8s-2646 Renesas Electronics Corporation., h8s-2646 Datasheet - Page 772

• Manufacturer Part Number: h8s-2646
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
• Manufacturer: Renesas Electronics Corporation.

Section 22 Power-Down Modes
22.2
22.2.1
SBYCR is an 8-bit readable/writable register that performs power-down mode control.
SBYCR is initialized to H'58 by a reset and in hardware standby mode. It is not initialized in
software standby mode.
Bit 7—Software Standby (SSBY): When making a low power dissipation mode transition by
executing the SLEEP instruction, the operating mode is determined in combination with other
control bits.
Note that the value of the SSBY bit does not change even when shifting between modes using
interrupts.
Rev. 5.00 Sep 22, 2005 page 746 of 1136
REJ09B0257-0500
Bit 7
SSBY
0
1
Bit
Initial value
R/W
Register Descriptions
Standby Control Register (SBYCR)
Description
Shifts to sleep mode when the SLEEP instruction is executed in high-speed
mode or medium-speed mode.
Shifts to subsleep mode when the SLEEP instruction is executed in subactive mode.
Shifts to software standby mode, subactive mode, and watch mode when the SLEEP
instruction is executed in high-speed mode or medium-speed mode.
Shifts to watch mode or high-speed mode when the SLEEP instruction is executed in
subactive mode.
:
:
:
SSBY
R/W
7
0
STS2
R/W
6
1
STS1
R/W
5
0
STS0
R/W
4
1
OPE
R/W
3
1
—
—
2
0
—
—
1
0
(Initial value)
—
—
0
0