Interfacing USB from computer with an 8051

Discussion in 'Embedded Systems and Microcontrollers' started by BrockM, Dec 25, 2010.

  1. BrockM

    Thread Starter New Member

    Dec 25, 2010
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    0
    Hi everyone, before I ask my question, I want you to know that I did my research already and looked almost everywhere, but I could not find explicit instructions on how to connect my Winbond 89C55 (8051 compatible from futurlec) with my computer using USB, which is why I'm asking here. I asked my professor and he recommended that I use a USB to UART converter. I eBayed and found this, and I was wondering if I could use this to connect my 8051 to my PC. http://cgi.ebay.com/Serial-Converte...389?pt=LH_DefaultDomain_0&hash=item4151d82e65 That device has 6 pins: 3.3V, RST, TXD, RXD, GND, +5V On the 8051, I see three pins named RST, TXD, RXD. Would it work if I connect the pins on the converter to those three pins on the 8051, then connect my GND and +5V to the pins on the converter, then the USB to the computer? Thanks beforehand.
     
  2. t06afre

    AAC Fanatic!

    May 11, 2009
    5,939
    1,222
    You need to connect like this as a minimum
    GND-GND
    TXD-RXD
    RXD-TXD
    I am not sure about the RST pin function is it a input or output pin? The RST pin on the 8051 is the reset pin.
     
  3. BrockM

    Thread Starter New Member

    Dec 25, 2010
    2
    0
    Oh, that connection makes more sense! Thanks. The reset pin.. based on the picture on the link, it looks like an input.
     
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