h8s-2649 Renesas Electronics Corporation., h8s-2649 Datasheet - Page 611

• Manufacturer Part Number: h8s-2649
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
• Manufacturer: Renesas Electronics Corporation.

21.1
Registers related to power-down modes are shown below. For details on SCKCR, see section
20.1.1, System Clock Control Register (SCKCR). For details on TCSR, see section 12.2.2, Timer
Control/Status Register (TCSR).
• Standby control register (SBYCR)
• System clock control register (SCKCR)
• Low-power control register (LPWRCR)
• Timer control/status register (TCSR)
• Module stop control register A (MSTPCRA)
• Module stop control register B (MSTPCRB)
• Module stop control register C (MSTPCRC)
• Module stop control register D (MSTPCRD)
21.1.1
SBYCR controls power-down modes.
Bit
7
Bit Name
SSBY
Register Descriptions
Standby Control Register (SBYCR)
Initial
Value
0
R/W
R/W
Software Standby
Description
This bit in combination with other control bits specifies
the operating mode after executing the SLEEP
instruction. For details, see table 21.2.
0: Shifts to sleep mode when the SLEEP instruction is
1: Shifts to software standby mode, subactive mode, or
This bit does not change when shifting between modes
by using interrupts. 0 should be written to this bit to
clear it.
executed in high-speed mode or medium-speed
mode, or to subsleep mode when the SLEEP
instruction is executed in subactive mode
watch mode when the SLEEP instruction is executed
in high-speed mode or medium-speed mode, or to
watch mode or high-speed mode when the SLEEP
instruction is executed in subactive mode
Rev. 2.00 Dec. 05, 2005 Page 573 of 724
Section 21 Power-Down Modes
REJ09B0200-0200