HD6417034B RENESAS [Renesas Technology Corp], HD6417034B Datasheet - Page 375

• Manufacturer Part Number: HD6417034B
• Description: 32-Bit RISC Microcomputer
• Manufacturer: RENESAS [Renesas Technology Corp]

12.3.4
In interval timer mode, when TCNT overflows the OVF flag in TCSR is set to 1 and an interval
timer interrupt is requested (figure 12.6).
12.3.5
When TCNT overflows the WOVF bit in RSTCSR is set to 1 and a WDTOVF signal is output.
When the RSTE bit is set to 1, TCNT overflow enables an internal reset signal to be generated for
the entire chip (figure 12.7).
Overflow signal
(internal signal)
Overflow signal
(internal signal)
Timing of Overflow Flag (OVF) Setting
Timing of Watchdog Timer Overflow Flag (WOVF) Setting
WOVF
TCNT
CK
TCNT
Figure 12.7 Timing of WOVF Bit Setting and Internal Reset
OVF
CK
Figure 12.6 Timing of OVF Setting
H'FF
H'FF
H'00
H'00
Rev. 7.00 Jan 31, 2006 page 349 of 658
Section 12 Watchdog Timer (WDT)
REJ09B0272-0700