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| HD404328 Datasheet, PDF (23/96 Pages) Hitachi Semiconductor – 4 BIT SINGLE CHIP MICROCOMPUTER | |||
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Power on
HD404328 Series
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
PC â $000A
PC â $000C
PC â $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
ZCD
interrupt?
No
(A/D, serial interrupt)
Figure 8 Interrupt Processing Flowchart
21
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