Computer hardware that translates data between

Info icon This preview shows pages 38–44. Sign up to view the full content.

View Full Document Right Arrow Icon
computer hardware that translates data between parallel and serial forms. circle6 An example of UART communication is RS-232. circle6 UARTs are commonly included in microcontrollers. circle6 A UART is usually used for serial communications over a computer or peripheral device serial port. circle6 Serial ports are used as a control console for diagnostics & configuration. circle6 Many modern personal computers do not have a serial port since this legacy port has been superseded by USB now. Reference : Universal asynchronous receiver/transmitter. (2010, July 28). In Wikipedia, The Free Encyclopedia. Retrieved 15:14, August 1, 2010, from http://en.wikipedia.org/w/index.php?title=Universal_asynchronous_receiver/transmitter&oldid=375909355
Image of page 38

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
UART – Features circle6 The Universal Asynchronous Receiver/Transmitter (UART) controller is the key component of the serial communications subsystem of a computer. circle6 The UART takes bytes of data and transmits the individual bits in a sequential fashion. At the destination, a second UART re-assembles the bits into complete bytes. circle6 Serial transmission of digital information (bits) through a single wire or other medium is much more cost effective than parallel transmission through multiple wires. circle6 The UART usually does not directly generate or receive the external signals used between different items of equipment. Typically, separate interface devices are used to convert the logic level signals of the UART to and from the external signaling levels. Reference : Universal asynchronous receiver/transmitter. (2010, July 28). In Wikipedia, The Free Encyclopedia. Retrieved 15:14, August 1, 2010, from http://en.wikipedia.org/w/index.php?title=Universal_asynchronous_receiver/transmitter&oldid=375909355
Image of page 39
RS-232 – Example Connection
Image of page 40

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
RS-232 – Signal Lines Reference : http://en.wikipedia.org/w/index.php?title=Serial_port&oldid=375074019
Image of page 41
RS-232 – Bus Speeds & Signal Levels circle6 The typical operational speeds of the RS-232 bus are: 9600 bits/sec 19200 bits/sec 38400 bits/sec 57600 bits/sec 115200 bits/sec Reference : RS-232. (2010, July 30). In Wikipedia, The Free Encyclopedia. Retrieved 17:56, August 1, 2010, from http://en.wikipedia.org/w/index.php?title=RS-232&oldid=376240910
Image of page 42

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
RS-232 – Null Modem circle6 Null modem is a communication method to connect two DTEs directly using an RS-232 serial cable. circle6 The RS-232 standard is asymmetrical as to the definitions of the two ends of the communications link so it assumes that one end is a DTE and the other is a DCE e.g. a modem. Reference : Null modem. (2010, July 16). In Wikipedia, The Free Encyclopedia. Retrieved 18:01, August 1, 2010, from http://en.wikipedia.org/w/index.php?title=Null_modem&oldid=373861640
Image of page 43
RS-232 – Null Modem Connection Reference : Null modem. (2010, July 16). In Wikipedia, The Free Encyclopedia. Retrieved 18:01, August 1, 2010, from http://en.wikipedia.org/w/index.php?title=Null_modem&oldid=373861640
Image of page 44
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern