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| HD404339 Datasheet, PDF (24/78 Pages) Hitachi Semiconductor – 4-bit HMCS400-Series microcomputer with large-capacity memory | |||
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HD404339 Series
Power on
RESET = 0? No
Yes
RAME = 0
MCU reset
Reset input
MCU operation cycle
Yes
IF = 1?
No
No
IRnAstMruEct=io1n
execution
IM = 0
IE = 1
Yes
Yes
SBY/STOP
instruction
No
IE â 0
Stack â (PC),
(CA), (ST)
Power-down mode
operation cycle
(see figure 17)
PC â (PC)+1
PC â vector
address
Figure 16 MCU Operation Sequence (Power On)
24
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