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| HD404459 Datasheet, PDF (39/122 Pages) Renesas Technology Corp – 4-bit HMCS400-series microcomputers | |||
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Low-power mode
operation cycle
HD404459 Series
IF = 1 and
No
IM = 0?
*
Yes
Standby/Watch
mode
Stop mode
Hardware NOP
execution
No
IF = 1 and
IM = 0?
Yes
Hardware NOP
execution
No
STOPC = 0?
Yes
RAME = 1
PC â Next
Iocation
PC â Next
Iocation
Instruction
execution
Reset MCU
MCU operation
cycle
Note: * For IF and IM operation, refer to figure 15.
Figure 22 MCU Operating Sequence (Low-Power Mode Operation)
37
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