Configuration Options for 18C801

   Oscillator Selection:
     OSC = LP             LP Oscillator
     OSC = EC             EC Oscillator
     OSC = HS             HS Oscillator
     OSC = RC             RC Oscillator

   Power-up Timer:
     PWRT = ON            Enable
     PWRT = OFF           Disable

   External Bus Data Width:
     BW = 8               8-bit external bus mode
     BW = 16              16-bit external bus mode

   Watchdog Timer:
     WDT = OFF            Disabled
     WDT = ON             Enabled

   Watchdog Timer Postscale Selection:
     WDTPS = 1            1:1
     WDTPS = 2            1:2
     WDTPS = 4            1:4
     WDTPS = 8            1:8
     WDTPS = 16           1:16
     WDTPS = 32           1:32
     WDTPS = 64           1:64
     WDTPS = 128          1:128

   Stack Full/Underflow RESET:
     STVR = OFF           Disabled
     STVR = ON            Enabled