HD404354 데이터 시트보기 (PDF) - Hitachi -> Renesas Electronics

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HD404354

4-bit HMCS400-series microcomputer

Hitachi -> Renesas Electronics 

HD404358 Series

Power on

RESET = 0?

No

Yes

Reset MCU

Interrupt

request?

No

Yes

No

IE = 1?

Yes

Execute instruction

Accept interrupt

PC ←(PC) + 1

IE ← 0

Stack ← (PC)

Stack ← (CA)

Stack ← (ST)

PC← $0002

PC← $0004

PC← $0006

PC← $0008

PC← $000A

PC←$000C

PC← $000E

Yes

INT0

interrupt?

No

Yes

INT1

interrupt?

No

Yes

Timer-A

interrupt?

No

Yes

Timer-B

interrupt?

No

Yes

Timer-C

interrupt?

No

Yes

A/D

interrupt?

No

(serial interrupt)

Figure 10 Interrupt Processing Flowchart

20

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