HD4074344 Datasheet, PDF (35/100 Pages) Hitachi Semiconductor – 4-bit microcomputers

Stop
Oscillator: Stop
Peripheral clocks: Stop
All other clocks: Stop
HD404344R Series/HD404394 Series
Standby
Oscillator: Active
Peripheral clocks: Active
All other clocks: Stop
No
RESET = 0?
Yes
No
STOPC = 0?
Yes
RAME = 1
No
RESET = 0?
Yes _{IF0 • IM0 = 1?} No
RAME = 0
Yes _{IFTB • IMTB =} No
1?
Yes _{IFTC • IMTC =} No
1?
Yes _{IFAD • IMAD =} No
1?
Yes _{IFS • IMS =} No
1?
Yes
Restart
processor clocks
Execute
next instruction
Restart
processor clocks
Reset MCU
No
IF = 1,
IM = 0, and
IE = 1?
Yes
Execute
next instruction
Interrupt accept
Figure 13 MCU Process Flowchart
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