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Kontron COMe-bP5020 User Manual

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39

User Guide

COMe-bP5020

Table 23: Address: 0x288 - Board ID High Byte Register (BIDH)

Table 24: Address: 0x289 - Board and PLD Revision Register (BREV)

Table 25: Address: 0x28C - Watchdog Timer Control Register (W TIM)

BIT

7

6

5

4

3

2

1

0

NAME

BIDH

ACCESS

R

RESET

0xD0

BITFIELD

DESCRIPTION

[7:0]

BIDH

Board identif ication: 0xD0C8
0xD0 = COMe-bP5020 (high byte)

BIT

7

6

5

4

3

2

1

0

NAME

BREV

PREV

ACCESS

R

R

RESET

N/A

N/A

BITFIELD

DESCRIPTION

[7:4]

BREV

Board revision

[3:0]

PREV

PLD revision

BIT

7

6

5

4

3

2

1

0

NAME

WTE

WMD

WEN/WTR

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/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 indi-
cated 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
1000 = 32 s
1001 = 64 s
1010 = 128 s
1011 = 256 s

1100 = 512 s
1101 = 1024 s
1110 = 2048 s
1111 = 4096 s