HD404364 데이터 시트보기 (PDF) - Renesas Electronics

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HD404364

4-bit HMCS400-Series microcomputer

Renesas Electronics 

MCU operation

cycle

HD404369 Series

IF = 1?

No

Instruction

execution

Yes

No IM = 0 and

IE = 1?

Yes

Yes SBY/STOP

instruction?

No

Low-power mode

operation cycle

PC ← Next

location

IE ← 0

Stack ← (PC),

(CA),

(ST)

PC ← Vector

address

IF: Interrupt request flag

IM: Interrupt mask

IE: Interrupt enable flag

PC: Program counter

CA: Carry flag

ST: Status flag

Figure 18 MCU Operating Sequence (MCU Operation Cycle)

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