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Renesas RX Series

Renesas RX Series
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R01UH0823EJ0100 Rev.1.00 Page 830 of 1823
Jul 31, 2019
RX23W Group 30. Watchdog Timer (WDTA)
Figure 30.4 Operation Example in Auto-Start Mode
Refresh-
prohibited
period
Refresh-
prohibited
period
Refresh-
permitted
period
Status flag
cleared
Status flag
cleared
Counter value
100%
75%
50%
25%
0%
RES# pin
Refresh
the counter
Active : H
REFEF flag
Active: High
UNDFF flag
Active: High
Reset output
from WDT
Active: High
Interrupt request
(WUNI)
Active: Low
H
L
H
L
H
L
H
L
L
Underflow
Counting starts
Refresh error Refresh error
Counting startsCounting startsCounting starts

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