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HD404369F データシート(PDF) 38 Page - Renesas Technology Corp

部品番号 HD404369F
部品情報  microcomputer has an A/D converter
PDF  117 Pages
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メーカー  RENESAS [Renesas Technology Corp]
ホームページ  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

HD404369F データシート(HTML) 38 Page - Renesas Technology Corp

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HD404369 Series
36
Low-power mode
operation cycle
IF = 1 and
IM = 0?
Hardware NOP
execution
←
PC
Next
Iocation
MCU operation
cycle
Standby/watch
mode
IF = 1 and
IM = 0?
Hardware NOP
execution
PC
Next
Iocation
←
Instruction
execution
Stop mode
No
Yes
No
Yes
For IF and IM operation, refer to figure 12.
STOPC = 0?
RAME = 1
Reset MCU
No
Yes
Figure 19 MCU Operating Sequence (Low-Power Mode Operation)
Note:
When the MCU is in watch mode or subactive mode, if the high level period before the falling edge
of
INT
0 is shorter than the interrupt frame, INT0 is not detected. Also, if the low level period after
the falling edge of
INT
0 is shorter than the interrupt frame, INT0 is not detected. Edge detection is
shown in figure 20. The level of the
INT
0 signal is sampled by a sampling clock. When this
sampled value changes to low from high, a falling edge is detected. In figure 21, the level of the
INT
0 signal is sampled by an interrupt frame. In (a) the sampled value is low at point A, and also
low at point B. Therefore, a falling edge is not detected. In (b), the sampled value is high at point
A, and also high at point B. A falling edge is not detected in this case either. When the MCU is in
watch mode or subactive mode, keep the high level and low level period of
INT
0 longer than the
interrupt frame



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