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# B & B ELECTRONICS
ATRWDT, ATXWDT
Card Type Watchdog timer card
Chip Set None
Maximum Onboard Memory Unidentified
I/O Options Serial port
Hard Drives supported None
Floppy drives supported None
Data Bus 16-bit ISA
Card Size Full-length
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Function | Label | Function | Label |
|-------------------------+-------+------------------+-------|
| 9-pin serial port | J2 | Reset button | J4 |
| | | connector | |
|-------------------------+-------+------------------+-------|
| Motherboard reset | J3 | ATX power supply | ATX |
| connector | | connector | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Label | Position |
|----------------------------+--------------+----------------|
| Normal relay enabled | JP1/A-B | Pins 1 & 2 |
| | | closed |
|----------------------------+--------------+----------------|
| Timer relay enabled | JP1/A-B | Pins 2 & 3 |
| | | closed |
|------------------------------------------------------------|
| Note: If normal relay is enabled, the relay will discharge |
| normally and will energize after the timeout is reached. |
| If timer relay is enabled, the relay will be energized |
| while the timer is running and discharge after the timeout |
| is reached, disabled, or the power is turned off. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BASE I/O ADDRESS SELECTION |
|------------------------------------------------------------|
| Setting | SW1/1 | SW1/2 |SW1/3 |SW1/4 |SW1/5 |SW1/6 |SW1/7 |
|---------+-------+-------+------+------+------+------+------|
| 000h | On | On | On | On | On | On | On |
|---------+-------+-------+------+------+------+------+------|
| 008h | Off | On | On | On | On | On | On |
|---------+-------+-------+------+------+------+------+------|
| 010h | On | Off | On | On | On | On | On |
|---------+-------+-------+------+------+------+------+------|
| 018h | Off | Off | On | On | On | On | On |
|---------+-------+-------+------+------+------+------+------|
| 020h | On | On | Off | On | On | On | On |
|---------+-------+-------+------+------+------+------+------|
| 3D8h | Off | Off | On | Off | Off | Off | Off |
|---------+-------+-------+------+------+------+------+------|
| 3E0h | On | On | Off | Off | Off | Off | Off |
|---------+-------+-------+------+------+------+------+------|
| 3E8h | Off | On | Off | Off | Off | Off | Off |
|---------+-------+-------+------+------+------+------+------|
| 3F0h | On | Off | Off | Off | Off | Off | Off |
|---------+-------+-------+------+------+------+------+------|
| 3F8h | Off | Off | Off | Off | Off | Off | Off |
|------------------------------------------------------------|
| Note: |
| |
|A total of 128 base address settings are available. The |
|switches are a binary representation of the decimal memory |
|addresses. SW1/7 is the Most Significant Bit and switch |
|SW1/1 is the Least Significant Bit. The switches have the |
|following decimal values: SW1/7=512, SW1/6=256, SW1/5=128, |
|SW1/4=64, SW1/3=32, SW1/2=16, SW1/1=8. Turn off the switches|
|and add the values of the switches to obtain the correct |
|memory address. (Off=1, On=0) |
+------------------------------------------------------------+
+------------------------------------------------------------+
| MISCELLANEOUS TECHNICAL NOTES |
|------------------------------------------------------------|
| To enable the ATR version of the watchdog timer card to |
| reboot the main board, they must be connected. The mother |
| board reset connector on the watchdog timer card can be |
| connected to the reset pins on the main board or the reset |
| button connector of the watchdog timer card can be |
| connected to the jumper wires of the main board’s reset |
| switch. |
+------------------------------------------------------------+