HD6433713 datasheet(86/324 Pages) RENESAS

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3.3 System Modes

The H8/300L CPU is equipped with power-down modes for minimizing power dissipation. These

and the other system modes are described below. There are five modes altogether, as follows.

•

Active mode

•

Sleep mode

•

Standby mode

•

Watch mode

•

Subactive mode

Figure 3-8 shows the transitions among these modes.

Figure 3-8 System Mode Transition Diagram

SSBY = 0

and SLEEP

instruction

Sleep mode

IRQ or IRQ

or timer A

SSBY = 1 and

TMA3 = 0 and

SLEEP

instruction

Standby mode

Active mode

IRQ or IRQ

LSON = 0 and IRQ ,

or LSON = 0 and

time base

SSBY = 1 and TMA3 = 1

and SLEEP instruction

LSON = 1 and

IRQ0, or LSON =

1 and time base*

DTON = 0

and SLEEP

instruction

LSON = 0 and

DTON = 1 and

SLEEP instruction

Subactive

mode

Reset

Watch mode

RES

* Time base: Timer A interrupt during time-base operation running on subclock.

Note:

Low-power operation modes

HD6433713 Datasheet(PDF) 86 Page - Renesas Technology Corp

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