Hello
I have a facility to use external watchdog in my design . I want use
WinISP for Flash programming . External
watchdog Timer generates reset when I
Put 89C51RD2 in bootloader mode .So I can
not program flash with WinISP if I use external Watchdog Timer.
So i decided to use internal watchdog timer. We were using 89c55 earlier which do
not have inbuilt bootloader . We have our application developed with 89C55. We have chosen 89C51RD2 as it gives more program memory and bootloader . If if I want to use
bootloader i have to use internal Watchdog.
My firmware applications earlier was as per
1.6sec external watchdog timer. The firmware
is in C , so if i have to do changes for 8ms watchdog or 35ms watchdog it becomes difficult for me to put Watchdog calls once in 35 ms. I don't want to put it in timer ISR as it will defeat the purpose of Watchdog Timer.

Thanks and Regards
Mahesh Mokashi