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H8S/2240 数据表(PDF) 440 Page - Renesas Technology Corp

部件名 H8S/2240
功能描述  Renesas 16-Bit Single-Chip Microcomputer H8S Family / H8S/2200 Series
PDF  818 Pages
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制造商  RENESAS [Renesas Technology Corp]
网页  http://www.renesas.com
标志 RENESAS - Renesas Technology Corp

H8S/2240 数据表(HTML) 440 Page - Renesas Technology Corp

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Section 11 Watchdog Timer
Rev.3.00 Mar. 26, 2007 Page 398 of 772
REJ09B0355-0300
11.3.2
Interval Timer Operation
To use the WDT as an interval timer, clear the WT/
IT bit in TCSR to 0 and set the TME bit to 1.
An interval timer interrupt (WOVI) is generated each time TCNT overflows, provided that the
WDT is operating as an interval timer, as shown in figure 11.5. This function can be used to
generate interrupt requests at regular intervals.
TCNT count
H'00
Time
H'FF
WT/
IT = 0
TME = 1
WOVI
Overflow
Overflow
Overflow
Overflow
Legend:
WOVI: Interval timer interrupt request generation
WOVI
WOVI
WOVI
Figure 11.5 Interval Timer Operation



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