AM4011
Configuration
ID 1022-1626, Rev. 1.0
Page 4 - 9
P R E L I M I N A R Y
Table 4-10: Watchdog Timer Control Register
REGISTER NAME
WATCHDOG TIMER CONTROL REGISTER
ADDRESS
0x282
BIT
NAME
DESCRIPTION
RESET
VALUE
ACCESS
7
WTE
Watchdog timer expired status bit
0 = Watchdog Timer has not expired
1 = Watchdog Timer has expired.
Writing a ’1’ to this bit resets it to 0.
0
R
6-5
WMD
Watchdog Mode
00 = Timer only mode
01 = Reset mode
10 = Interrupt mode
11 = Cascaded mode (dual-stage mode)
00
R/W
4
WEN/WTR Watchdog enable / Watchdog trigger control bit:
0 = Watchdog Timer has not been enabled
Prior to the Watchdog being enabled, this bit is known as WEN.
After the Watchdog is enabled, it is known as WTR. Once the
Watchdog Timer has been enabled, this bit cannot be reset to 0.
As long as the Watchdog Timer is enabled, it will indicate a ’1’.
1 = Watchdog Timer is enabled
Writing a ’1’ to this bit causes the Watchdog to be retriggered to
the timer value indicated by bits WTM[3:0].
0
R/W
3-0
WTM
Watchdog timeout settings
0000 = 0.125 s
0001 = 0.25 s
0010 = 0.5 s
0011 = 1 s
0100 = 2 s
0101 = 4 s
0110 = 8 s
0111 = 16 s
1000 = 32 s
1001 = 64 s
1010 = 128 s
1011 = 256 s
1100 = reserved
1101 = reserved
1110 = reserved
1111 = reserved
The nominal timeout period is 5% longer than the above-stated val-
ues.
0000
R/W
