serial bus
DESCRIPTION
Serial Bus Data Communication ProtocolsData CommunicationAdvanced Data CommunicationAutomationTRANSCRIPT
-
Serial BusJohnlee P. MendozaBsit-121
-
HistoryIEEE Std 1394-1995 (also known as FireWire or i.Link), developed byT10
https://en.wikipedia.org/wiki/Serial_Bus_Protocol_2
-
Objectives
Explain Serial BusShow the RS 232 modem applicationAdvantage and Disadvantage of Serial Bus
-
DefinitionSerial BusBit by bit transmission of information in series
http://web.calstatela.edu/faculty/nganesa/College%20Courses/Slide%20Download%20Pool/Communication%20Theory/Serial%20and%20Parallel%20Communication.ppt
Series1.0 diagram of Serial Bus
-
IntroductionSerial buses, is a compound word consisting of a serial and a busesserial mean sequential, in order , or one-by-one. bus(singular for buses) is derived from latin word omnibus meaning for all. So literally serial buses mean one-by one for all.Serial communication
http://www.slideshare.net/umargaro/serial-buses
-
2.0 Image of Serial Communication Bus Connecting peripheral to Computer
-
types of serial communications:RS232. RS422. RS485.USB (Universal Serial Bus)
http://cse.spsu.edu/qian/resource/Ch6-ppt.ppt
-
Advantage and Disadvantageof Serial Bus
-
AdvantagesLess CostTo control the effect of electromagnetic interference from the environmentTo allow full duplex communication with no loss of data
http://www.slideshare.net/umargaro/serial-buses
-
DisadvantageLower speedDifficult to maintain data integrity due to problems with synchronizing clocks
http://www.engr.sjsu.edu/wdu/ME296N/2006/Lecture/Lecture8_SerialParalle.pdf
-
Types of Serial Bus
-
RS232(Standard 232)Commonly used for one to one communication.1 Receiver onlySerial binary single-ended data and control signals connecting between a DTE (Data Terminal Equipment) and a DCE (Data Communication Equipment).
http://www.slideshare.net/umargaro/serial-buses
-
1.1 Diagram showing DTE and DCE equipment
-
History Rs-232It was originally established in 19621969. (RS-232-C) was to be accepted as a standard for computer manufacturers.1987. EIA association elaborated a new version of the standard which was called EIA-232-D.1991. EIA together with Telecommunications Industry association (TIA) elaborated a new version of the standard which was called EIA/TIA-232-Ehttp://www.lookrs232.com/rs232/history_rs232.htm
-
RS-232 Parametersends the data character by character
This mode of communication is called asynchronous communication
http://www.slideshare.net/umargaro/serial-buses
-
What is Asynchronous?usually used to describecommunicationin whichdata can be transmitted intermittently rather than in a steady stream.SenderStopDataStartReceiver1,2 Diagram of Asynchronous
-
RS-232 Connectors25-pin connector and 9-pin connector50 feet can be extended to several hundred feet with high-quality cable
http://www.slideshare.net/umargaro/serial-buses
-
1.3 Db-25 pins connector diagram
-
1.4 Db-9 pins connector diagram
-
1.5 Specification of Rs-232
-
RS-422one of the fastest serial data rates at 10Mbps. up to 10 receiverscannot be used to construct a truly multi-point network.
-
1.6 Master and 1-slaves transceiver diagram
-
1.7 Master and 4-slaves diagram
-
1.8 Specification of Rs-422
-
1.9 Rs-232 can be converted into Rs-422
-
(RS-485)Multi-Point Communications
Similar to Rs422(more nodes per line)
Standard Specifies up to 32drivers and 32 receivers on 2 wire
-
2.0 Rs-485 Specification
-
Universal Serial Bus(USB)Communication between devices and host controllerCan connect computer peripherals such as mouse,keyboard,digital camera,cellphones etc.not need a power source of their own.
http://www.slideshare.net/umargaro/serial-buses
-
USB HistoryDevelopment in 1994Co-invented by Ajay Bhatt of Intel and the USB-IF (USB Implementers Forum, Inc.)
-
2.1 Diagram of USB Speed
-
USB Data TransferEach transfer uses a defined format to send data, addressing information, error detecting bits, and status and control informationUSB communication(with one exception in USB 3.0)supports four transfer types: control, bulk, interrupt, and isochronous
http://www.slideshare.net/umargaro/serial-buses
-
Control transferthe host sends a defined request to the device.host uses control transfers to request a series of data structures called descriptors from the deviceThree stages: Setup, Data (optional), and Status
http://www.slideshare.net/umargaro/serial-buses
-
Control TransferSetup -stage contains the request.Data stage- data from the host or deviceStatus stage- information about the success of the transfer
http://www.slideshare.net/umargaro/serial-buses
-
Bulk Transferfastest on an otherwise idle bus but have no guaranteed timingPrinters and USB virtual COM-port
http://www.slideshare.net/umargaro/serial-buses
-
Interrupt transfers
-
Isochronous transfers
-
Application
-
RS232 IN MODEM APPLICATIONS
-
Modem ApplicationMost popular uses for the RS232 standardCommunication between the two modems is accomplished via telecommunication.
http://ecee.colorado.edu/~mcclurel/dan83.pdf
-
2.2 Modem Communication between two PCs
-
Summary
-
SummaryAll four of these standards were written by the EIA (Electronics Industry Association) to allow peripherals and computers to communicate with each other regardless of manufacturer.
http://www.synchrotech.com/support/serial_standards.html
*