r5s77631ay266bgv Renesas Electronics Corporation., r5s77631ay266bgv Datasheet - Page 715

• Manufacturer Part Number: r5s77631ay266bgv
• Description: Renesas 32-bit Risc Microcomputer Superhtm Risc Engine Family Sh-4a Series
• Manufacturer: Renesas Electronics Corporation.

17.3.1
WDTST is a readable/writable 32-bit register that specifies the time until a watchdog timer
overflows. The time until WDTCNT overflows becomes the minimum value when set H'001 to
the bits 11 to 0, and the maximum value when set H'000 to the bits 11 to 0. Use a longword access
to write to the WDTST, with H'5A in the bits 31 to 24. The reading value of bits 31 to 24 is
always H'00.
Initial value:
Initial value:
Bit
31 to 24
23 to 12
11 to 0
R/W:
R/W:
Bit:
Bit:
Watchdog Timer Stop Time Register (WDTST)
Bit Name
(Given
code)

WDTST
R/W
31
15

R
0
0
R/W
30
14

R
0
0
R/W
29
13

R
0
0
Initial
Value
H'00
All 0
All 0
(Given code)
R/W
28
12

R
0
0
R/W
R/W
R/W
R/W
R
R/W
27
11
0
0
R/W
R/W
26
10
0
0
Description
Reserved (Given code for writing)
These bits are always read as H'00. To write to this
register, the write value must be H'5A.
Reserved
These bits are always read as 0. The write value
should always be 0.
Counter value
R/W
R/W
25
0
9
0
R/W
R/W
24
0
8
0
R/W
23

R
0
7
0
Section 17 Watchdog Timer and Reset (WDT)
WDTST
Rev. 1.00 Oct. 01, 2007 Page 649 of 1956
R/W
22

R
0
6
0
R/W
21

R
0
5
0
R/W
20

R
0
4
0
R/W
19

R
0
3
0
REJ09B0256-0100
R/W
18

R
0
2
0
R/W
17

R
0
1
0
R/W
16

R
0
0
0