What is the difference between microprocessor,microcontroller and digital signal processor?

   The processor usually refers to the microprocessor, microcontroller and digital signal processor these three types of chips. A microprocessor (MPU) usually represents a powerful CPU, but not a chip that is intended for any given specific computing purpose. 

   
    This chip is usually the core CPU of personal computers and high-end workstations. The most common microprocessors are the Motorola 68K series and Intel's X86 series. Early micro-controller is a computer built into a chip, embedded applications, so called single chip (single-chip microcomputer). Subsequently, in order to better meet the embedded control applications, SCM to go on meet some of the control circuit to expand the number of units. Currently, microcontrollers have been widely known as microcontrollers (MCUs). There are also microcontrollers developed by microprocessors. For example, Intel's 386EX is a very successful microcontroller version of the 80386 microprocessor. Like embedded microprocessors, it is otherwise known as embedded microprocessors. High-end embedded processor products include arm from Advanced RISC Machines, MIPS from Silicon Graphics, Power PC from IBM and Motorola, Intel's X86 and i960 chips, AMD's Am386EM and Hitachi's SH RISC chips.
   The CPUs in digital signal processors (DSPs) are specially designed to handle extremely fast discrete time signal processing calculations, such as those requiring audio and video communications. DSPs include multipliers that perform these operations faster than other processors. The most common are TI's TMS320CXX series and Motorola's 5600X series

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