HD404334 데이터 시트보기 (PDF) - Renesas Electronics

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HD404334

4-bit HMCS400-Series microcomputer with large-capacity memory

Renesas Electronics 

HD404339 Series

Power on

RESET = 0? No

Yes

RAME = 0

MCU reset

Reset input

MCU operation cycle

Yes

IF = 1?

No

No

IRnAstMruEct=io1n

execution

IM = 0

IE = 1

Yes

Yes

SBY/STOP

instruction

No

IE ← 0

Stack ← (PC),

(CA), (ST)

Power-down mode

operation cycle

(see figure 17)

PC ← (PC)+1

PC ← vector

address

Figure 16 MCU Operation Sequence (Power On)

24

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