HD6417615 Hitachi Semiconductor, HD6417615 Datasheet - Page 557

• Manufacturer Part Number: HD6417615
• Description: Hardware Manual
• Manufacturer: Hitachi Semiconductor

13.3.4
In interval timer mode, when WTCNT overflows, the OVF flag in WTCSR is set to 1 and an
interval timer interrupt (ITI) is requested (figure 13.6).
13.3.5
When WTCNT overflows the WOVF flag in RSTCSR is set to 1 and a WDTOVF signal is output.
When the RSTE bit is set to 1, WTCNT overflow enables an internal reset signal to be generated
for the entire chip (figure 13.7).
Overflow signal
(internal signal)
Overflow signal
(internal signal)
WTCNT
Timing of Overflow Flag (OVF) Setting
Timing of Watchdog Timer Overflow Flag (WOVF) Setting
WOVF
WTCNT
OVF
Figure 13.7 Timing of WOVF Setting
Figure 13.6 Timing of OVF Setting
H'FF
H'FF
H'00
H'00
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