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You are here: Home / Topics / null connection

null connection

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Microcontroller › 8051 › null connection

  • This topic has 2 replies, 3 voices, and was last updated 12 years, 10 months ago by AJISH ALFRED.
Viewing 3 posts - 1 through 3 (of 3 total)
  • Author
    Posts
  • August 14, 2012 at 3:47 am #1910
    ritesh
    Participant

    i use usb to db9 cable for  p89v51rd2 program loader

    BF-810 cable i use.

     

    it is require for null connection of pin of db9 pin. how to null?

     

    thanks…

    August 14, 2012 at 6:19 am #8454
    madhu
    Participant

    you connect db9 connector as pin2 as receiver , pin3 as transmitteer & pin5 as gnd. this is null modem connection

    August 14, 2012 at 6:25 pm #8462
    AJISH ALFRED
    Participant

    Hi,

    All you have to use is three pins,

    2–>RX

    3–>TX

    5–>GND

     

    Now use any application like hyperterminal, cutecome etc. to set the serial port baud rate and other properties

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