Section 28 Power-Down Modes - Renesas H8S Family Hardware Manual

For operating modes after the reset state is cancelled, this LSI has not only the normal program

execution state but also four 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

System clock frequency for the CPU operation can be selected as φ/2, φ/4, φ/8, φ/16,or φ/32.

• Sleep mode

The CPU stops but on-chip peripheral modules continue operating.

• Software standby mode

Clock oscillation stops, and the CPU and on-chip peripheral modules stop operating.

• Hardware standby mode

Clock oscillation stops, and the CPU and on-chip peripheral modules enter reset state.

• Module stop mode

Independently of above operating modes, on-chip peripheral modules that are not used can be

stopped individually.

Section 28 Power-Down Modes

Rev. 1.00 Mar. 12, 2008 Page 1057 of 1178

REJ09B0403-0100