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COMe-P2020 User Guide

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 UP0100100 0

BITFIELD DESCRIPTION

[D0-D7] Board-Register-Low-Byte[7:0] Board Identification Low Byte:

COMe_P2020: 0xD048

1 2 ... 51 52 53 54 55 56 57 58 59 60 61 ... 105 106

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