HD404326H Просмотр технического описания (PDF) - Hitachi -> Renesas Electronics

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HD404326H

4-Bit Microcontroller

Hitachi -> Renesas Electronics 

Low-power mode

operation cycle

HD404328 Series

No

IF = 1, IM = 0?

Yes

Hardware NOP

execution

Standby/watch mode

Stop mode

For IF and IM operation,

refer to figure 11.

IF = 1, IM = 0?

No

Yes

Hardware NOP

execution

PC ←next location

PC ←next location

Instruction execution

MCU operation

cycle

Figure 18 MCU Operating Sequence (Low-Power Mode Operation)

Limitation on Use

• In subactive mode, the timer A interrupt request or the external interrupt request (INT0) occurs in

synchronism with the interrupt strobe. If the STOP or SBY instruction is executed at the same time

with the interrupt strobe, these interrupt requests will be cancelled and its corresponding interrupt

request flags (IFTA, IF0) will be not set.

In subactive mode, do not use the STOP or SBY instruction at the time of the interrupt strobe.

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