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| HD404328 Datasheet, PDF (36/96 Pages) Hitachi Semiconductor – 4 BIT SINGLE CHIP MICROCOMPUTER | |||
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HD404328 Series
MCU operation
cycle
Yes
IF = 1?
No
Instruction execution
No
IM = 0, IE = 1?
Yes
Yes
SBY, STOP
instruction?
No
Low-power mode
operation cycle
PC â next location
IE â 0; stack â (PC),
(CA), (ST)
PC â vector address
IF: Interrupt request flag
IM: Interrupt mask
IE: Interrupt enable flag
PC: Program counter
CA: Carry flag
ST: Status flag
Figure 17 MCU Operating Sequence (MCU Operation Cycle)
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