INTRODUCTION

the term network mean the iner connection of intercommmunication scheme between the number of system. Network for bedded system network must be in a real time constraint
INPUT AND Affair harborage
A harborage is a device the byte from external supplemental for reading them latterly using instructoons executed on the processor to shoot the bytes to external eripheral or device or supplemental or device or processor using instruction executed on processor.
A harborage connect to the procesor using and system motorcars. The processor uses the addresses of the harborage- programming the harborage function or modes, reading pot status and for writing or reading bytes. harboragetype1.serialports2.parallel anchorages periodical Anchorages
The periodical harborage is a type of connection on PCs that's used for peripherals similar as mice gaming regulator, and oldr printers.
SYNCHRONOUS periodical INPUT
reading from CD or hard fragment, audio input, videotape input, telephone tone, network input, transceiver input, scanner inptu remote regulator input, periodical I/ O machine input, writing to flash memory using SDIO. These are illustration for coterminous journal input operation.
SYNCHRONOUS SRRIAL OUTPUT
Inter-processor data transfer, multiprocessor communication, writing to CD or hard scrap, audio input/ affair, video input/ affair, dialer affair, network device affair, remote TV conteol, transeiver affair, and journal I/ O machine affair or notation to flash memory using SDIO. These re illustration foe coterminous srail affair operation.
journal ASYNCHRONOUS INPUT
Asynchronous srriql input is used for keyboard inputs and moderm input in computer
Keypad controller serail data- heft, mice, keyboard controller, modem input, character shoot inputs on journal line.
ASYCHRONOUS periodical Affair
Asychronous affair journal pot line TxD
Each bit in each byte transmit at fixed interval but each outputbyte is not in sychronization minimum separation is 1 stop bit interval TxD.
resemblant harborage
A resemblant harborage is an interfaces allowing a particular computer to transmit or recive data down multiple pack string to a supplemental device similar as a printer. The most common resemblant harborage is a peinter harborage known as the centronics harborage. A resemblant harborage as multiple connectors and in proposition allows data to be transferred commnications. The technology is still used moment for low- data- rate communication similar as fleck- matrix printing. The standard for the bi- directional interpretation of a resemblant harborage is the institute of electrical and electrronics masterminds. This standqtd definedbi-directional resemblant communication between computer and other supplemental bias allowing data bits to be transmitted and entered contemporaneously.
A resemblant harborage is a type of interface on apersonal computer transmitting or entering data to a supplemental device similar as a printer