E202075_HD404889 Datasheet, PDF (56/202 Pages) Renesas Technology Corp – Low-Voltage AS Microcomputers with On-Chip LCD Circuit

HD404889/HD404899/HD404878/HD404868 Series
Stop mode Standby mode Watch mode
No
RESET=0?
Yes
WU₀ to WU₃
No = ?
Yes
RESET=0? ^No
Yes
IFWU·IMWU ^No
=1?
Yes
IF0·IM0 = 1? ^No
Yes
IF1·IM1 = 1? ^No
System clock
oscillator started
System reset
Yes*
IFTA · IMTA ^No
= 1?
Yes
IFTB · IMTB+ _No
IFTD·IMTD = 1?
Yes*
IFTC· IMTC ^No
= 1?
Yes*
IFAD·IMAD+
IFS·IMS = 1? _No
Yes*
System clock
oscillator started
NOP
Next Instruction
execution
System clock
oscillator started
Note: Only when clearing from standby mode
No
Next Instruction
execution
IF = 1,
IM = 0,
IE = 1?
Yes
Interrupts
enabled
Figure 14 MCU Operation Flowchart
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