Hi Harhsa,

Eric and Saji have looked at your circuit. Saji suggests tying pin 30 High. Your circuit doesn't show that. He suggests pulling pin 8 and 9 on the 232 to ground: your circuit doesn't show that either. You really could do with a better reset source: at least make one with an RC circuit and a schmitt trigger (74HC14 ?) , or something.

If you need help, your circuit needs to show what you have REALLY built, not what you THINK you have built.

Been there, done that, been terribly embarrassed when boss (father actually), points out that there is no Vcc on the cpu...but it WAS on the drawing. This, I hasten to add was long before I was crippled with the title guru.....

Steve