| PCI WATCHDOG TIME CARD |
SOFTWARE PROGRAMMING
|
ADDRESS
|
SPECIFICATION
|
|
Base
+ 00H
|
Enable or Refresh Watch Dog (READ)
|
|
Base
+ 01H
|
Disable
Watch Dog (READ)
|
|
Base
+ 04H
|
Down
Counter Byte 0
|
|
Base
+ 05H
|
Down
Counter Byte 1
|
|
Base
+ 06H
|
Down
Counter Byte 2
|
|
Base
+ 07H
|
Select
Clock Source and Power ON/OFF
|
1. Base + 00H
Read Base + 00H to enable watch dog counter.
2. Base + 01H
Read Base + 01H to disable watch dog counter.
3. Base + 04, 05, 06
The down counter is a 18 bits register, where byte 2 is MSB, byte 0 is LSB.
Only two bits is available in byte 2.
Bit 0 to bit 3 are used to select counter Frequency, bit 4 is used to turn ON/OFF power control box, bit 5 is used to enable/ disable Reset signal
A.
S3 to S0
0 = 1 / 2048
1 = 1 / 1024
2 = 1 / 512
3 = 1 / 256
4 = 1 / 128
5 = 1 / 64
6 = 1 / 32
7 = 1 / 16
8 = 1 / 8
9 = 1 / 4
10 = 1 /2
B. Bit 4
0 = Turn ON power control box.
1 = Turn OFF power control box.
C. Bit 5
0 = Enable reset signal
1 = Disable reset signal
8.2 Enable Watch Dog Counter
1. Preset down counter (Write value to Base +4, 5, 6)
2. Preset clock frequency (Write value to Base +7)
3. Enable watch dog counter (Read Base+0)
If you want disable down counter, please read base +1.
If you want set power ON/OFF, please write to bit 4 of Base+7.
If you want enable reset signal, please write to bit 5 of Base +7.
 |
