Product data

HD404818 Series
34
MCU operation
cycle
IF = 1 ?
Instruction
execution
SBY/STOP
instruction ?
PC next
location
PC vector
address
Low-power mode
operation cycle
IE 0
Stack (PC),
(CA),
(ST)
IM = 0 and
IE = 1 ?
←
←
←
Yes
No
No
Yes
Yes
No
IF:
IM:
IE:
PC:
CA:
ST:
←
Interrupt request flag
Interrupt mask
Interrupt enable flag
Program counter
Carry flag
Status flag
Figure 16 MCU Operating Sequence (MCU operation cycle)