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| HD404019R Datasheet, PDF (18/65 Pages) Renesas Technology Corp – CMOS 4-bit single-chip microcomputers | |||
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HD404019R 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 â 0
Stack â (PC)
Stack â (CA)
Stack â (ST)
PC â $0002
PC â $0004
PC â $0006
PC â $0008
Yes
INT0
interrupt?
No
Yes
INT1
interrupt?
No
Yes
Timer A
interrupt?
No
Yes
Timer B
interrupt?
No
PC â $000C
(serial interrupt)
Figure 8 Interrupt Processing Flowchart
16
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