HD6412240 RENESAS [Renesas Technology Corp], HD6412240 Datasheet - Page 440

• Manufacturer Part Number: HD6412240
• Description: Renesas 16-Bit Single-Chip Microcomputer H8S Family / H8S/2200 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

Section 11 Watchdog Timer
11.3.2
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.
Rev.3.00 Mar. 26, 2007 Page 398 of 772
REJ09B0355-0300
Legend:
WOVI: Interval timer interrupt request generation
H'FF
H'00
TCNT count
WT/IT = 0
TME = 1
Interval Timer Operation
Overflow
WOVI
Figure 11.5 Interval Timer Operation
Overflow
WOVI
Overflow
WOVI
Overflow
WOVI
Time