Kontron CP6006-SA, User Manual

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CP6006-SA – User Guide, Rev. 0.5 Preliminary
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3.3.5. Watchdog Timer Control Register (WTIM)
Table 36: Watchdog Timer Control Register (WTIM)
ADDRESS 0x28C
BIT 7 6 5 4 3 2 1 0
NAME WTE WMD WEN/WT
R
WTM
ACCESS R/W R/W R/W R/W
RESET 0 00 0 0000
BITFIELD DESCRIPTION
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.
6..5 WMD Watchdog mode:
00 = Timer only mode
01 = Reset mode
10 = Interrupt mode
11 = Cascaded mode (dual-stage mode)
4 WEN/WT
R
Watchdog enable / Watchdog trigger control bit:
0 = Watchdog timer not 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 enabled
Writing a ’1’ to this bit causes the Watchdog to be retriggered to the timer value
indicated by bits WTM[3..0].
3..0 WTM Watchdog timeout settings:
0000 = 0.125 s
1000 = 32 s
0001 = 0.25 s 1001 = 64 s
0010 = 0.5 s 1010 = 128 s
0011 = 1 s 1011 = 256 s
0100 = 2 s 1100 = 512 s
0101 = 4 s 1101 = 1024 s
0110 = 8 s 1110 = 2048 s
0111 = 16 s 1111 = 4096 s