PRESENTED BY:
GEETANJALI CHELLANI

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What is Embedded system ?
• An embedded system is a computer system that is integrated into a larger system which is not, itself, a general purpose computer.
Classification of Embedded Systems
à Microprocessor Based : A microprocessor is a simple processor intended for general computing tasks. Must be accompanied by separate memory and peripherals chips.
à Micro controller Based : A micro controller is a microprocessor with memory, I/O, peripherals and connecting buses all fabricated on single silicon piece. Optimized for control applications
Microprocessor
* CPU for Computers
* No RAM, ROM, I/O on CPU chip itself
* Example：Intel’s x86, Motorola’s 680x0
* A smaller computer
* On-chip RAM, ROM, I/O ports...
* Example：Motorola’s 6811, Intel’s 8051, Zilog’s Z8 and PIC 16X
Block Diagram of Microcontroller
Microprocessor
* CPU is stand-alone, RAM, ROM, I/O, timer are separate
* Designer can decide on the amount of ROM, RAM and I/O ports.
* General purpose & digital computer