HD6433644R datasheet(67/549 Pages) RENESAS

67 / 549 page

Section 2 CPU

Rev. 6.00 Sep 12, 2006 page 47 of 526

REJ09B0326-0600

CPU state

Reset state

Program

execution state

Program halt state

Exception-

handling state

Active

(high speed) mode

Active

(medium speed) mode

Subactive mode

Sleep (high-speed)

mode

Standby mode

Watch mode

Subsleep mode

Low-power

modes

The CPU executes successive program

instructions at high speed,

synchronized by the system clock

The CPU executes successive

program instructions at

reduced speed, synchronized

by the system clock

The CPU executes

successive program

instructions at reduced

speed, synchronized

by the subclock

A state in which some

or all of the chip

functions are stopped

to conserve power

A transient state in which the CPU changes

the processing flow due to a reset or an interrupt

The CPU is initialized

Note: See section 5, Power-Down Modes, for details on the modes and their transitions.

Sleep (medium-speed)

mode

Figure 2.14 CPU Operation States

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