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1. EMBEDDED
SYSTEMS

2.  Embedded system means the processor or controller is
embedded into that application.
 An embedded product uses a microprocessor or
microcontroller to do task.
 In an embedded system, there is only one application
software that is typically burned into ROM.
 Example：mp3 players, washing machining, micro-oven.

3. What is Embedded Systems ?
DRIVES
Software

4. Where Embedded System ?

6. Embedded Systems -
Building Blocks
 Micro Processors / Micro Controllers.
 Embedded C++ / Embedded C / Assembly Programming.
 Bus Standards.(Ex:CAN,I2C,USB)
 PCB Design.
 RTOS.
 Networking.
 Device Drivers.

7. REQUIREMENTS
 CPU: Central Processing Unit
 I/O: Input /Output
 Bus: Address bus & Data bus
 Memory: RAM & ROM
 Timers/Counters
 Interrupts
 Serial Port

8. MICROPROCESSOR
A MICROPROCESSOR incorporates most or all of
the functions of a computer’s central processing
unit(CPU) on a single integrated circuit(IC)

10. MICROCONTROLLER
A microcontroller (sometimes
abbreviated µC, uC or MCU) is a small computer on a
single integrated circuits containing a processor core,
memory, and programmable input/output peripherals.

12. CPU
RAM
ROM
I/O
ports
Timers/
counters
Serial
com
CPU RAM ROM
Timers/
counters
Serial com Interrupts
Microprocessor
Vs
Microcontroller
Vs

13. Micro Processor Micro Controller

14. Controller & Processor
• Application
– processor is for simple system design
– controller is for special purpose complex
system design
• Speed
– processor is used when speed of operation
of system is not critical
– controller is used when speed is important

15. Micro Processor Application

16. Embedded Products Using
Microcontrollers
• Home
Appliances, intercom, telephones, security
systems, garage door openers, answering
machines, fax machines, home computers,
TVs, cable TV tuner, VCR, camcorder,
remote controls, video games, cellular
phones, musical instruments, sewing
machines, lighting control, paging, camera,
pinball machines, toys, exercise equipment

17. Embedded Products Using
Microcontrollers
• Office
– Telephones, computers, security systems, fax
machines, microwave, copier, laser printer, color
printer, paging

18. Embedded Products Using
Microcontrollers
• Auto
– Trip computer, engine control, air bag, ABS,
instrumentation, security system,
transmission control, entertainment, climate
control, cellular phone, keyless entry

19. CHOOSING A MICROCONTROLLER
Computing needs
Speed, packaging, power consumption, RAM, ROM, I/O
pins, timers,
upgrade to high performance or low-power versions, cost
Software development tools
Assembler, debugger, C compiler, emulator, technical
support
Availability & source

20. • Intel
• Atmel
• Philips/ Signetics
• Siemens
• Dallas Semiconductor
Companies Producing 8051