|
HD404618 Datasheet, PDF (32/89 Pages) Hitachi Semiconductor – 4-Bit Single-Chip Microcomputer | |||
|
◁ |
HD404618 Series
MCU operation
cycle
IF = 1 ?
No
Yes
No
Instruction
execution
IM = 0 and
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)
PCâ 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)
32
|
▷ |