HD404354 View Datasheet(PDF) - Renesas Electronics

Part Name

Description

Manufacturer

HD404354

4-bit HMCS400-Series microcomputer

Renesas Electronics 

HD404358 Series

MCU operation

cycle

IF = 1?

Yes

No

Instruction

execution

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 15 MCU Operating Sequence (MCU Operation Cycle)

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