Hello Sir/Mam ,
Please tell me the reason that why clock frequency of 8051 is 11.059MHz why not 12MHz

 

please tell me where pic microcontroller is used & what r its features

 

I have moved your questions to a new thread here. Posting questions on someone else's thread is called hijacking and is not a polite thing to do.

 

Hello Sir/Mam ,
Please tell me the reason that why clock frequency of 8051 is 11.059MHz why not 12MHz

11.0592 MHz when divided by an integer(s) (1152 and 576) will produce a better approximation to standard baud rates of 9600 bits per second and 19,200 bits per second. A small sacrifice in execution speed increases the bit time accuracy of serial communications. This is a very common compromise.

On ATmega processors from Atmel 7.3728 MHz is used in place of 8.000 MHz for the same reason.

 

please tell me where pic microcontroller is used & what r its features

Which pic microcontroller? There are hundreds. Just go to microchip to view all of the various features.

http://www.microchip.com/pagehandler/en-us/products/picmicrocontrollers

They are used pretty much anywhere equipment is controlled electronically along with about of dozen or so manufactures that do the same thing.

 

This also gives you the applications list.
http://www.microchip.com/pagehandler/en-us/technology/home.html
Max.