H8SXSLASH1663M datasheet(1267/1504 Pages) RENESAS

1267 / 1504 page

Section 28 Power-Down Modes

Rev. 2.00 Sep. 24, 2008 Page 1235 of 1468

REJ09B0412-0200

Section 28 Power-Down Modes

Functions for reduced power consumption by this LSI include a multi-clock function, module stop

function, and a function for transition to power-down mode.

28.1

Features

• Multi-clock function

The frequency division ratio is settable independently for the system clock, peripheral module

clock, and external bus clock.

All of the system clock, peripheral module clock, and external bus clock can be switched to

32.768-kHz subclock.

• Module stop function

The functions for each peripheral module can be stopped to make a transition to a power-down

mode.

• Transition function to power-down mode

Transition to a power-down mode is possible to stop the CPU, peripheral modules, and

oscillator.

• Five power-down modes

Sleep mode

All-module-clock-stop mode

Software standby mode

Deep software standby mode

Hardware standby mode

Table 28.1 shows conditions to shift to a power-down mode, states of the CPU and peripheral

modules, and clearing method for each mode. After the reset state, since this LSI operates in

normal program execution state, the modules, other than the DMAC, DTC, and EXDMAC are

stopped.

H8SX/1663M Datasheet(PDF) 1267 Page - Renesas Technology Corp