Hi, I am using P89V51RD2 Controller keil softare and flash magic for my application .I am using three timers(T0,T1,T2),Srial interrupt,External 0 & 1 interrupts in my program.The code size is about 40k.While communicating with gateway through serial port it is getting struct few times in day .I have taken care of enabling interrupts, loops at all cost. Now I want to include watch dog timer in my code.Kindly tell me how to use watch dog timer.I am not able to implement it information providded in the data sheet. kindly give me example codes .I am in urgent to solve my probalam .please help me. With regards, A.Bhaskar Reddy, abreddy1990@yahoo.com