Watchdog Timer Control Register (Wtim) - Kontron AM4024 User Manual

3.3.5 Watchdog Timer Control Register (W TIM)
Table 29: Watchdog Timer Control Register (WTIM)
ADDRESS
BIT 7
NAME
WTE
R/W
ACCESS
RESET
0
BITFIELD
7 Watchdog timer expired status bit:
WTE
0 = Watchdog timer has not expired
1 = Watchdog timer has expired.
Writing a '1' to this bit resets it to 0.
6..5 WMD Watchdog mode:
00 = Timer only mode
01 = Reset mode
10 = Interrupt mode
11 = Cascaded mode (dual-stage mode)
4 WEN/WTR Watchdog enable / Watchdog trigger control bit:
0 = Watchdog timer not enabled
1 = Watchdog timer enabled
Writing a '1' to this bit causes the Watchdog to be retr iggered to the timer value indicated
by bits WTM[3..0].
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
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6 5 4
WEN/WTR
WMD
R/W R/W
00 0
Pr ior to the Watchdog being enabled, this bit is known as WEN. Af ter the Watchdog is
enabled, it is known as WTR. Once the Watchdog timer has been enabled, this bit can-
not be reset to 0. As long as the Watchdog timer is enabled, it will indicate a '1'.
0x28C
3 2
DESCRIPTION
1000 = 32 s
1001 = 64 s
1010 = 128 s
1011 = 256 s
1100 = 512 s
1101 = 1024 s
1110 = 2048 s
1111 = 4096 s
User Guide
AM4024(E)
1 0
WTM
R/W
0000
45