Hercules III User Manual Rev A.2
www.diamondsystems.com
Page
82
WDIEN
0 = Disable edges on the WDI pin, retriggering watchdog timer.
1 = Enable edges on the WDI pin retriggering watchdog timer.
WDOEN
0 = Disable edge on WDO pin when watchdog timer reaches 1.
1 = Enable edge on WDO pin when watchdog timer reaches 1.
WDSMI
0 = Disable system management interrupt signal when watchdog timer reaches 0.
1 = Enable system management interrupt signal when watchdog timer reaches 0.
WDEDGE 0 = Falling edge on WDI retriggers watchdog timer, when WDIEN = 1.
1 = Rising edge on WDI retriggers watchdog timer, when WDIEN = 1.
I/O Address: 0x25F (Read/Write)
Bit:
7
6
5
4
3
2
1
0
Name:
COM4EN COM3EN FPGAEN
WDEN
-
COM4EN COM4 chip select enable.
1 = Enable COM4-CS#.
0 = Disable COM4-CS#.
COM3EN COM3 chip select enable.
1 = Enable COM3-CS#.
0 = Disable COM3-CS#.
FPGAEN FPGA chip select enable.
1 = Enable FPGA-CS#.
0 = Disable FPGA-CS#.
WDEN
Watchdog enable.
1 = Watchdog timer counter enable.
0 = Watchdog timer counter disable, WDO disable, WDI disable, CPURST# disable,
EXTSMI# disable.
The CPLD initializes all values to zero on power up, and the BIOS enables each resource based on
BIOS settings.