HD6433682 ETC, HD6433682 Datasheet - Page 105

• Manufacturer Part Number: HD6433682
• Description: Renesas 16-Bit Single-Chip Microcomputer H8 Family/H8/300H Tiny Series
• Manufacturer: ETC

This LSI has six modes of operation after a reset. These include a normal active mode and four
power-down modes, in which power consumption is significantly reduced. Module standby mode
reduces power consumption by selectively halting on-chip module functions.
6.1
The registers related to power-down modes are listed below.
LPW3002A_000120030300
Active mode
The CPU and all on-chip peripheral modules are operable on the system clock. The system
clock frequency can be selected from osc, osc/8, osc/16, osc/32, and osc/64.
Subactive mode
The CPU and all on-chip peripheral modules are operable on the subclock. The subclock
frequency can be selected from w/2, w/4, and w/8.
Sleep mode
The CPU halts. On-chip peripheral modules are operable on the system clock.
Subsleep mode
The CPU halts. On-chip peripheral modules are operable on the subclock.
Standby mode
The CPU and all on-chip peripheral modules halt. When the clock time-base function is
selected, the RTC is operable.
Module standby mode
Independent of the above modes, power consumption can be reduced by halting on-chip
peripheral modules that are not used in module units.
System control register 1 (SYSCR1)
System control register 2 (SYSCR2)
Module standby control register 1 (MSTCR1)
Module standby control register 2 (MSTCR2)
Register Descriptions
Section 6 Power-Down Modes
Rev. 3.00, 05/03, page 75 of 472