Hi Sreerachan

I think you are talking about Siemens/Infinion SAB 80515/80535(N).
A nice controller with alot of I/O lines an A/D with 8 to 1 mux. (PLCC68)
I use it if I need more I/O lines then 8052. Look on Infinion Homepage you will find lot of information. If you have problems place another request here or send an email to me.

Have fun
Peter