h8s-2111b Renesas Electronics Corporation., h8s-2111b Datasheet - Page 263

• Manufacturer Part Number: h8s-2111b
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family / H8s/2100 Series
• Manufacturer: Renesas Electronics Corporation.

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 figure 11.4.
H'FF
H'00
Interval Timer Mode
TCNT value
[Legend]
WOVI : Internal timer interrupt request occurrence
WT/IT = 0
TME = 1
φ
TCNT
Overflow signal
(internal signal)
OVF
Figure 11.3 Interval Timer Mode Operation
Overflow
WOVI
Figure 11.4 OVF Flag Set Timing
H'FF
Overflow
WOVI
Overflow
WOVI
Rev. 1.00, 05/04, page 229 of 544
H'00
Overflow
WOVI
Time