Using my CH341A.

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  • philbo_baggins
    New Member
    • Feb 2020
    • 1
    • United States

    #41
    Re: Using my CH341A.

    Originally posted by newguy90
    I successfully read and wrote in circuit the 93c56 and 93A56 EEPROM's. I didn't have to power on the circuit, I just used the SOIC8 test clip with the interface
    that I built!
    I could not use the CH341a though, so I have no use for that interface... at least for now.
    newguy90, I am working through a similar problem that you did, do you mind doing a quick writeup of what you did to get this to work? It sounds like you didn't use the CH341 usb programmer/software, but connected directly to the chip through a serial port? I wasn't sure where the drawing you redlined came from, or if that was the final version that you used. Thanks.

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    • R_J
      Badcaps Legend
      • Jun 2012
      • 9514
      • Canada

      #42
      Re: Using my CH341A.

      Check this site, it has some information: https://hw-server.com/serial-eeprom-programmer
      or do a google search for "93c56 programmer"
      Also see here http://www.lancos.com/prog.html for ponyprog

      Comment

      • stj
        Great Sage 齊天大聖
        • Dec 2009
        • 30910
        • Albion

        #43
        Re: Using my CH341A.

        if you dont want to build something,
        another option is this!

        i just recieved one yesterday - very capable for the price!
        http://www.xgecu.com/EN/TL866_main.html
        http://www.aliexpress.com/item/32992209964.html
        (and it can work in Linux as well as windows)

        Comment

        • beekerc69
          New Member
          • Oct 2021
          • 1
          • United States

          #44
          Re: Using my CH341A.

          can you share exactly how you got the 3.3v working?
          what pins you tied together or what jumper settings you used?
          Thanks

          Comment

          • stj
            Great Sage 齊天大聖
            • Dec 2009
            • 30910
            • Albion

            #45
            Re: Using my CH341A.

            3.3v on what adapter?

            Comment

            • digby1951
              Member
              • Jan 2017
              • 36
              • uk

              #46
              Re: Using my CH341A.

              Originally posted by beekerc69
              can you share exactly how you got the 3.3v working?
              what pins you tied together or what jumper settings you used?
              Thanks
              https://www.youtube.com/watch?v=Hwnz...nnel=AdamantIT

              Comment

              • remaker
                New Member
                • Nov 2008
                • 5

                #47
                I recently had a similar problem and posted a photo of the Chinese jumpers to Chinese Stack Exhange
                https://chinese.stackexchange.com/q/59967/43628

                Basically, jumper, 1-2 means “programmer.” That activates the programming line (ACT#) on the chip. Jumpers 2–3 translate to “brush machine,” while “brush machine” idiomatically means “flash programmer,” what it's really doing is disconnecting the programming line and setting up the system to use the USB to RS-232 as pass-through at TTL level. It seems that all USB the serial converters are called, brush machines, or flash programmers, since that is the most common use of the converter these days.

                This particular model does not let you adjust 3.3V and 5V output. It seems to work fine on 3.3V parts, but a lot of people are uncomfortable with the electronic design. There are a number of sites that talk about how to physically modify the device to get through 3.3V, but it worked fine for me on 3.3V parts.

                Comment

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