HD404889_03 Datasheet, PDF (56/197 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
IF = 1,
IM = 0,
IE = 1?
Yes
Next Instruction
execution
Interrupts
enabled
Figure 14 MCU Operation Flowchart
Rev.6.00, Sep.08.2003, page 56 of 197