Renesas R5S72621 User Manual

 
Section 13   Watchdog Timer 

 

 

Page 672 of 2108 

 

R01UH0134EJ0400  Rev. 4.00 

 

 Sep 

24, 

2014 

SH7262 Group, SH7264 Group

When operating in interval timer mode, interval timer interrupts are generated at every overflow of 
the counter. This enables interrupts to be generated at set periods. 

1. Clear the WT/

IT bit in WTCSR to 0, set the type of count clock in the CKS[2:0] bits in 

WTCSR, and set the initial value of the counter in WTCNT. 

2.  Set the TME bit in WTCSR to 1 to start the count in interval timer mode. 

3.  When the counter overflows, this module sets the IOVF bit in WTCSR to 1 and an interval 

timer interrupt request is sent to the interrupt controller. The counter then resumes counting. 

 

H'FF

ITI

ITI

ITI

ITI

H'00

WTCNT value

ITI:  Interval timer interrupt request generation

WT/

IT = 0

TME = 1

Time

Overflow

Overflow

Overflow

Overflow

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