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HD404618 Datasheet, PDF (20/89 Pages) Hitachi Semiconductor – 4-Bit Single-Chip Microcomputer | |||
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HD404618 Series
Power
on
No
RESET = 1 ?
Yes
Reset MCU
Interrupt Yes
request ?
No
Execute instruction
No
IE = 1?
Yes
Accept interrupt
PC â(PC) + 1
IE â0
Stack â (PC)
Stack â (CA)
Stack â (ST)
PCâ $0002
PCâ $0004
PCâ $0006
PCâ $0008
Yes
INT0
interrupt ?
No
Yes
INT1
interrupt ?
No
Yes Timer A
interrupt ?
No
Yes Timer B
interrupt ?
PCâ $000A
No
Yes Timer C
interrupt ?
No
PCâ$000C
(serial interrupt)
Figure 9 Interrupt Processing Flowchart
20
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