29-06-2012, 12:55 PM
EMBEDDED SYSTEMS
EMBEDDED SYSTEMS.ppt (Size: 547 KB / Downloads: 71)
Introduction
An Embedded system is one that has computer –
hardware with application software and RTOS
embedded in it as one of its most important
component . The hardware of a general-
purpose computer is typically pre-defined
like CPU, monitor, keyboard, mouse, CD-ROM…
Overview Of Embedded Systems Architecture:
Every Embedded system consists of:
Custom built hardware around a central processing unit (CPU).
A software residing on the memory chip of hardware and an Operating system.
The operating system runs above the hardware and the application software runs above the hardware.
Building Blocks Of Embedded Systems:
The various building blocks of an embedded system are:
Central Processing Unit (CPU).
Memory (ROM and RAM)
Input Devices
Output Devices
Communication interfaces
Application specific circuitry
CPU
CPU is usually made of:
Microcontrollers: On chip only there will be place for many components like memory, serial communication interface etc.
(or)
Microprocessors: They are most powerful but need many external components.
(or)
DSP (digital signal processing): It used in applications where video and audio processing is involved.
Memory, Input and Output devices
Memory: It is of 2 types-RAM and ROM.ROM is used for storing contents as it wont get erased if power is off, where as it gets erased in case of RAM
Input devices: They wont have key board or mouse for taking input but sensors and transducers are used as input.
Output devices: They have a limited capacity. usually LCD may be used to display some important parameter.
EMBEDDED SYSTEMS.ppt (Size: 547 KB / Downloads: 71)
Introduction
An Embedded system is one that has computer –
hardware with application software and RTOS
embedded in it as one of its most important
component . The hardware of a general-
purpose computer is typically pre-defined
like CPU, monitor, keyboard, mouse, CD-ROM…
Overview Of Embedded Systems Architecture:
Every Embedded system consists of:
Custom built hardware around a central processing unit (CPU).
A software residing on the memory chip of hardware and an Operating system.
The operating system runs above the hardware and the application software runs above the hardware.
Building Blocks Of Embedded Systems:
The various building blocks of an embedded system are:
Central Processing Unit (CPU).
Memory (ROM and RAM)
Input Devices
Output Devices
Communication interfaces
Application specific circuitry
CPU
CPU is usually made of:
Microcontrollers: On chip only there will be place for many components like memory, serial communication interface etc.
(or)
Microprocessors: They are most powerful but need many external components.
(or)
DSP (digital signal processing): It used in applications where video and audio processing is involved.
Memory, Input and Output devices
Memory: It is of 2 types-RAM and ROM.ROM is used for storing contents as it wont get erased if power is off, where as it gets erased in case of RAM
Input devices: They wont have key board or mouse for taking input but sensors and transducers are used as input.
Output devices: They have a limited capacity. usually LCD may be used to display some important parameter.