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TYT HT-7800 Data port pin outs

Discussion in 'General Technical Questions and Answers' started by ZS6BV, Aug 27, 2019.

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  1. ZS6BV

    ZS6BV Ham Member QRZ Page

    I am looking for info on making a programming cable for the TYT HT-7800.
    There does not seem to be info on the internet. I need the pin outs for the data port.
  2. KF5FEI

    KF5FEI Ham Member QRZ Page

    Assuming you meant TH-7800, the manual says it is a "PC programming data port." I'd just buy a cable -- probably $15 or less.
  3. ZS6BV

    ZS6BV Ham Member QRZ Page

    Yes TH-7800. The programming cables are not available here in SA. Would have to import it, our postal system is useless and then it will lie at customs for months. I have all the components to put one together. I just need the pinouts.
  4. KA9JLM

    KA9JLM Ham Member QRZ Page

  5. KF5FEI

    KF5FEI Ham Member QRZ Page

    Are they really using the USB-style connector as intended, tho?

    I have a Chinese DMR HT that came with a USB power cube and USB to charging stand cable, but the power cube put out 12 VDC. Not exactly kosher. So I boldly labeled the power cube as being 12 volts, and hot-glued the cable to it so there would be no mistakes.
  6. KA9JLM

    KA9JLM Ham Member QRZ Page

    It seems that they are, The radio schematic matches the same pin out.

    I guess it is possible that the voltage is different, But the pinout is the same.
  7. VK3PBJ

    VK3PBJ Ham Member QRZ Page

    I just made a DIY programming cable for my TH-7800.

    The data port on the back of the radio is a standard mini-USB, but it needs a TTY interface, so you can't just use a standard USB cable.

    I used a USB-to-TTY serial cable, and a salvaged USB-A socket to connect a standard mini-USB cable to the data port. Simply connect the TX, RX, and Gnd pins from the TTY cable to the appropriate pins on the USB-A socket.

    I was then able to use Chirp to read and write to the TH-7800.

    PC <--> USB-to-TTY cable <--> USB-A socket <--> Mini-USB cable <--> TH-7800
    KA9JLM likes this.

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