HD404848 Просмотр технического описания (PDF) - Hitachi -> Renesas Electronics

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Компоненты Описание

производитель

HD404848

4-Bit Single-Chip Microcomputer

Hitachi -> Renesas Electronics 

Power on

RESET = 0?

No

Yes

Reset MCU

HD404849 Series

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/INT2

interrupt?

No

Yes Timer C/INT3

interrupt?

No

Yes

Timer D

interrupt?

No

(A/D, serial interrupt)

Figure 11 Interrupt Processing Flowchart

22

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