H8S2110B RENESAS [Renesas Technology Corp], H8S2110B Datasheet - Page 254

• Manufacturer Part Number: H8S2110B
• Description: Renesas 16-Bit Single-Chip Microcomputer Renesas H8S Family/H8S/2100 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

Section 11 Watchdog Timer (WDT)
11.4.2
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 11.3. 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 in figure 11.4.
Rev. 2.00 Mar 21, 2006 page 216 of 518
REJ09B0299-0200
Legend:
WOVI : Internal timer interrupt request occurrence
H'FF
H'00
Interval Timer Mode
TCNT value
φ
TCNT
Overflow signal
(internal signal)
OVF
WT/IT = 0
TME = 1
Figure 11.3 Interval Timer Mode Operation
Overflow
WOVI
Figure 11.4 OVF Flag Set Timing
H'FF
Overflow
WOVI
Overflow
WOVI
H'00
Overflow
WOVI
Time