HD6412373R RENESAS [Renesas Technology Corp], HD6412373R Datasheet - Page 751
HD6412373R
Manufacturer Part Number
HD6412373R
Description
Renesas 16-Bit Single-Chip Microcomputer H8S Family/H8S/2300 Series
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
1.HD6412373R.pdf
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14.4.2
To use the WDT as an interval timer, set the WT/IT bit to 0 and TME bit in TCSR to 1.
When the WDT is used as an interval timer, an interval timer interrupt (WOVI) is generated each
time the TCNT overflows. 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 in the TCSR is set to 1.
WDTOVF signal
Internal reset signal *
Notes: 1. If TCNT overflows when the RSTE bit is set to 1, an internal reset signal is generated.
2. 130 states when the RSTE bit is cleared to 0.
Interval Timer Mode
H'FF
H'00
TCNT count
WT/IT=1
TME=1
1
Figure 14.2 Operation in Watchdog Timer Mode
H'00 written
to TCNT
WDTOVF and
internal reset are
generated
Overflow
132 states *
WOVF=1
Rev.7.00 Mar. 18, 2009 page 683 of 1136
518 states
Section 14 Watchdog Timer (WDT)
2
WT/IT=1
TME=1
REJ09B0109-0700
H'00 written
to TCNT
Time
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