h8s-2111b Renesas Electronics Corporation., h8s-2111b Datasheet - Page 497

• Manufacturer Part Number: h8s-2111b
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family / H8s/2100 Series
• Manufacturer: Renesas Electronics Corporation.

For operating modes after the reset state is cancelled, this LSI has not only the normal program
execution state but also seven power-down modes in which power consumption is significantly
reduced. In addition, there is also module stop mode in which reduced power consumption can be
achieved by individually stopping on-chip peripheral modules.
• Medium-speed mode
• Subactive mode
• Sleep mode
• Subsleep mode
• Watch mode
• Software standby mode
• Hardware standby mode
• Module stop mode
20.1
Power-down modes are controlled by the following registers. To access SBYCR, LPWRCR,
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).
• Standby control register (SBYCR)
• Low power control register (LPWRCR)
• Module stop control register H (MSTPCRH)
• Module stop control register L (MSTPCRL)
System clock frequency for the CPU operation can be selected as φ/2, φ/4, φ/8, φ/16, or φ/32.
The CPU operates based on the subclock and on-chip peripheral modules other than TMR_0,
TMR_1, WDT_0, and WDT_1 stop operating.
The CPU stops but on-chip peripheral modules continue operating.
The CPU and on-chip peripheral modules other than TMR_0, TMR_1, WDT_0, and WDT_1
stop operating.
The CPU and on-chip peripheral modules other than WDT_1 stop operating.
Clock oscillation stops, and the CPU and on-chip peripheral modules stop operating.
Clock oscillation stops, and the CPU and on-chip peripheral modules enter reset state.
Independently of above operating modes, on-chip peripheral modules that are not used can be
stopped individually.
Register Descriptions
Section 20 Power-Down Modes
Rev. 1.00, 05/04, page 463 of 544