h8s-2161b Renesas Electronics Corporation., h8s-2161b Datasheet - Page 408
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h8s-2161b
Manufacturer Part Number
h8s-2161b
Description
Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2100 Series
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.H8S-2161B.pdf
(845 pages)
- Current page: 408 of 845
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Section 14 Watchdog Timer (WDT)
14.4.2
When the WDT is used as an interval timer, an interval timer interrupt (WOVI) is generated each
time the TCNT overflows, as shown in figure 14.3. Therefore, an interrupt can be generated at
intervals.
When the TCNT overflows in interval timer mode, an interval timer interrupt (WOVI) is requested
at the same time the OVF bit of TCSR is set to 1. The timing is shown figure 14.4.
Rev. 3.00 Mar 21, 2006 page 354 of 788
REJ09B0300-0300
WOVI: Internal timer interrupt request occurrence
H'FF
H'00
Interval Timer Mode
TCNT value
TCNT
Overflow signal
(internal signal)
OVF
WT/IT = 0
TME = 1
Figure 14.3 Interval Timer Mode Operation
Overflow
WOVI
Figure 14.4 OVF Flag Set Timing
H'FF
Overflow
WOVI
Overflow
WOVI
H'00
Overflow
WOVI
Time
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