p2125vps20 Renesas Electronics Corporation., p2125vps20 Datasheet - Page 602

• Manufacturer Part Number: p2125vps20
• Description: 16-bit Single-chip Microcomputer H8s Family / H8s/2100 Series
• Manufacturer: Renesas Electronics Corporation.

Section 22 Power-Down Modes
22.1
Power-down modes are controlled by the following registers. To access SBYCR, LPWRCR,
SYSCR2, MSTPCRH, and MSTPCRL the FLSHE bit in the serial timer control register (STCR)
must be cleared to 0. For details on STCR, see section 3.2.3, Serial Timer Control Register
(STCR). For details on the PSS bit in TSCR_1 (WDT_1), see TCSR_1 in section 14.3.2, Timer
Control/Status Register (TCSR).
• Standby control register (SBYCR)
• Low power control register (LPWRCR)
• Module stop control register H (MSTPCRH)
• Module stop control register L (MSTPCRL)
• Module stop control register A (MSTPCRA)
• Module stop control register B (MSTPCRB)
22.1.1
SBYCR controls power-down modes.
Rev. 1.00 Sep. 21, 2006 Page 564 of 658
REJ09B0310-0100
Bit
7
Bit Name
SSBY
Register Descriptions
Standby Control Register (SBYCR)
Initial
Value
0
R/W
R/W
Description
Software Standby
Specifies the operating mode to be entered after executing
the SLEEP instruction.
When the SLEEP instruction is executed in high-speed mode
or medium-speed mode:
0: Shifts to sleep mode
1: Shifts to software standby mode, subactive mode, or watch
When the SLEEP instruction is executed in subactive mode:
0: Shifts to subsleep mode
1: Shifts to watch mode or high-speed mode
Note that the SSBY bit is not changed even if a mode
transition occurs by an interrupt.
mode