microprocessor vs microcontroller

• microprocessor is a stand alone device while microcontroller

             is not a stand alone device & it is connected directly to 
             the system external components.

• In Microprocessor more op-codes, few bit handling 

instructions. But in Microcontroller fewer op- codes, more 
bit handling Instructions, and also it is defined as a 
device that includes micro processor, memory & input / 
output signal lines on a single chip.

• In Microprocessor we have to connect external RAM, ROM,

I/o, Timers and interrupts by externally, whereas in
Microcontroller RAM, ROM,I/O, Timers serial communication
all are in built in microcontroller,
Microprocessor is used in Higher end Industrial projects
whereas Microcontroller can be used for lower end projects
because processor can beconnected by
external memory whereas in controller it is fixed memory in
some case we can add external memory also.