HD404848 データシートの表示（PDF） - Hitachi -> Renesas Electronics

部品番号

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HD404848

4-Bit Single-Chip Microcomputer

Hitachi -> Renesas Electronics 

HD404849 Series

MCU operation

cycle

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 21 MCU Operating Sequence (MCU Operation Cycle)

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