r5f71374an80fpv Renesas Electronics Corporation., r5f71374an80fpv Datasheet - Page 554

• Manufacturer Part Number: r5f71374an80fpv
• Description: 32-bit Risc Microcomputer Superh?? Risc Engine Family
• Manufacturer: Renesas Electronics Corporation.

Section 13 Watchdog Timer (WDT)
Rev. 1.00 Sep. 21, 2007 Page 528 of 1124
REJ09B0402-0100
Bit
5
4
3
2 to 0
Bit Name
RSTS
WOVF
IOVF
CKS[2:0]
Initial
Value
0
0
0
000
R/W
R/W
R/W
R/W
R/W
Description
Reset Select
Selects the type of reset when the WTCNT overflows in
watchdog timer mode. In interval timer mode, this setting
is ignored.
0: Power-on reset
1: Manual reset
Watchdog Timer Overflow
Indicates that the WTCNT has overflowed in watchdog
timer mode. This bit is not set in interval timer mode.
0: No overflow
1: WTCNT has overflowed in watchdog timer mode
Interval Timer Overflow
Indicates that the WTCNT has overflowed in interval timer
mode. This bit is not set in watchdog timer mode.
0: No overflow
1: WTCNT has overflowed in interval timer mode
Clock Select 2 to 0
These bits select the clock to be used for the WTCNT
count from the eight types obtainable by dividing the
peripheral clock (Pφ). The overflow period that is shown
inside the parenthesis in the table is the value when the
peripheral clock (Pφ) is 40 MHz.
000: Pφ (6.4 µs)
001: Pφ /4 (25.6 µs)
010: Pφ /16 (102.4 µs)
011: Pφ /32 (204.8 µs)
100: Pφ /64 (409.6 µs)
101: Pφ /256 (1.64 ms)
110: Pφ /1024 (6.55 ms)
111: Pφ /4096 (26.21 ms)
Note: If bits CKS2 to CKS0 are modified when the WDT
is operating, the up-count may not be performed
correctly. Ensure that these bits are modified only
when the WDT is not operating.