Chapter 6: INTERFACES Visit for more Learning Resources.

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Presentation transcript:

Chapter 6: INTERFACES Visit for more Learning Resources

RS232 (Recommended Standard) : Is an asynchronous serial communication method Known as EIA RS 232(Electronics Industry Association), EIA 232 and TIA 232(Telecommunication Industry Association) DTE has a 25 pin D-type male connector and DCE has a 25 pin D-type female connector Voltage Level of RS 232 : Logical 1-negative level, is called marking estate, OFF Logical 0-positive, is called space estate, ON Circuit voltage-25 volts Signal level of +5/-5V,+10/-10V,+12/-12V and -15/+15V

RS 232 Signal Description :

CD(Carrier Detect or Data Carrier Detect) : computer to know that the modem connected to the serial port has made a proper connection RxD(Receive Data) : data send from DCE to DTE TxD(Transmit Data) :data send from DCE to DTE GND(Signal Ground) : return path DSR(Data Set Ready) : from device to computer to inform that device is ready for communication RTS(Request to Send) : computer is ready to start the data communication CTS(Clear To Send) : inform to the computer that the computer can start the data transmission RI(Ring Indictor) : to inform to computer that someone is calling the modem

Serial Port in PC (Using NULL MODEM) : To connect two DTE(Computer, terminal, printer etc) With a null modem connection, transmit and receive lines are crosslinked

Firewire : Named for IEEE 1394 High Speed Serial Bus interface It is also known as i.Link Used in modern PC , multimedia device such as digital Video camera Offer high speed communication and isochronous real- time data services Features : Hot pluggability Connected 63 peripherals in an acyclic topology Peer to peer device communication Plug and play 45watts of power per port at up to 30 volts 100,200 or 400 bits/s Cable length- 4.5 meter No need for device ID Isochronous data transfer- suitable for digital video

Centronics Interface Signal : For more detail contact us