microcontrollers based on CISC architecture. RICS stands for Reduced Instruction Set
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13-10-2010, 03:29 PM

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Difference between CISC and RISC:
CISC stands for Complex Instruction Set Computer. Most PC's use CPU based on this architecture. For instance Intel and AMD CPU's are based on CISC architectures. Typically CISC chips have a large amount of different and complex instructions. In common CISC chips are relatively slow (compared to RISC chips) per instruction, but use little (less than RISC) instructions. MCS-51 family microcontrollers based on CISC architecture.
RICS stands for Reduced Instruction Set Computer. The philosophy behind it is that almost no one uses complex assembly language instructions as used by CISC, and people mostly use compilers which never use complex instructions. Therefore fewer, simpler and faster instructions would be better, than the large, complex and slower CISC instructions. However, more instructions are needed to accomplish a task. Atmell’s AVR microcontroller based on RISC architecture.
PIC microcontroller based on RISC architecture.I have Studied about PIC microcontroller,its description starts from next page.
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14-10-2010, 12:39 PM

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Embedded system breif introductions

MICROCONTROLLERS families archtecture

PIC MICROCONTROLLERS advantages families pin desc. Of pic16f73





A Combination of Hardware and software

Perform specific function

SENSORS:Fire Alarm, Smoke Sensor,temperature controller
Consumers Products:Washing Machine, Cameras,Cell phones
Aviation & Defence Purposes ROBOTICS


A single chip that contains the processor (the CPU), non-volatile memory for the program (ROM or flash), volatile memory for input and output (RAM), a clock and an I/O control unit.


Available in various families:-


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