R5S72611 RENESAS [Renesas Technology Corp], R5S72611 Datasheet - Page 660
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R5S72611
Manufacturer Part Number
R5S72611
Description
32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7260 Series
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
1.R5S72611.pdf
(1348 pages)
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Section 14 Watchdog Timer (WDT)
14.3.2
WTCSR is an 8-bit readable/writable register composed of bits to select the clock used for the
count, overflow flags, and timer enable bit.
WTCSR is initialized to H'18 by a power-on reset caused by the RES pin or in deep standby mode
or software standby mode. When used to count the clock oscillation settling time for canceling
software standby mode, it retains its value after counter overflow.
Use word access to write to WTCSR, writing H'A5 in the upper byte. Use byte access to read from
WTCSR.
Note: The method for writing to WTCSR differs from that for other registers to prevent
Rev. 2.00 Sep. 07, 2007 Page 628 of 1312
REJ09B0320-0200
Bit
7
6
erroneous writes. See section 14.3.4, Notes on Register Access, for details.
Watchdog Timer Control/Status Register (WTCSR)
Bit Name
IOVF
WT/IT
Initial value:
0
Initial
Value
0
R/W:
Bit:
R/(W)
IOVF WT/IT TME
0
7
R/W
R/(W)
R/W
R/W
0
6
R/W
Interval Timer Overflow
Description
Indicates that WTCNT has overflowed in interval timer
mode. This flag is not set in watchdog timer mode.
0: No overflow
1: WTCNT overflow in interval timer mode
[Clearing condition]
•
Timer Mode Select
Selects whether to use the WDT as a watchdog timer
or an interval timer.
0: Use as interval timer mode
1: Use as watchdog timer mode
Note: When the WTCNT overflows in watchdog timer
0
5
When 0 is written to IOVF after reading IOVF
—
R
4
1
mode, the WDTOVF signal is output externally.
If this bit is modified when the WDT is running,
the up-count may not be performed correctly.
—
1
R
3
R/W
0
2
CKS[2:0]
R/W
0
1
R/W
0
0
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