Kontron COMe-cP2020 - Manual (Page 56)

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COMe-P2020 User Guide
56
Table 3-35: 0x28C: Watchdog Timer Register
ACTION D7 D6 D5 D4 D3 D2 D1 D0
READ WTE WMD WEN/WTR WTM
WRITE w1c WMD WEN/WTR WTM
POWER UP 0 00 0 0000
BITFIELD DESCRIPTION
[D0-D3] 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
[D4] WEN/WTR Watchdog timer enable/watchdog trigger:
'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]
[D5-D6] WMD Watchdog mode:
"00" = Timer only mode
"01" = Reset mode
"10" = Interrupt mode
"11" = Cascaded mode (dual-stage)
[D7] WTE Watchdog timer expired status bit, writing '1' clears the bit:
'0' = Watchdog timer has not expired
'1' = Watchdog timer has expired
Table 3-36: 0x28D: Board ID Low Byte Register
ACTION D7 D6 D5 D4 D3 D2 D1 D0
READ Board-Register-Low-Byte[7:0]
WRITE Board-Register-Low-Byte[7:0]
POWER UP 0 1 0 0 1 0 0 0
BITFIELD DESCRIPTION
[D0-D7] Board-Register-Low-Byte[7:0] Board Identif ication Low Byte:
COMe_P2020: 0xD048