|
HD6433694 Datasheet, PDF (101/432 Pages) Renesas Technology Corp – 16-Bit Single-Chip Microcomputer H8 Family/H8/300H Tiny Series | |||
|
◁ |
Section 6 Power-Down Modes
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.
⢠Active mode
The CPU and all on-chip peripheral modules are operable on the system clock. The system
clock frequency can be selected from Ïosc, Ïosc/8, Ïosc/16, Ïosc/32, and Ïosc/64.
⢠Subactive mode
The CPU and all on-chip peripheral modules are operable on the subclock. The subclock
frequency can be selected from Ïw/2, Ïw/4, and Ïw/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, timer A 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.
6.1 Register Descriptions
The registers related to power-down modes are listed below.
⢠System control register 1 (SYSCR1)
⢠System control register 2 (SYSCR2)
⢠Module standby control register 1 (MSTCR1)
LPW3003A_000020020200
Rev. 4.00, 03/04, page 73 of 400
|
▷ |