Kontron CP308, Руководство пользователя

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CP308 Configuration
ID 1027-4487, Rev. 3.0 Page 4 - 15
P R E L I M I N A R Y
Table 4-15: Watchdog Timer Control Register (WTIM)
REGISTER NAME WATCHDOG TIMER CONTROL REGISTER (WTIM)
ADDRESS 0x28C
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/W
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 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].
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 = 512 s
1101 = 1024 s
1110 = 2048 s
1111 = 4096 s 0000 R/W