Qyt Kt8900 Programming Cable Pinout Top [portable] Info

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QYT KT-8900 Programming Cable Pinout

reversed pinout

Early QYT KT8900 units (pre-2017) used a different pinout: Pin 2 was RX and Pin 3 was TX. Later revisions standardized to the pinout above (Pin 2 = TX). If you have an older radio, you may need to try the :

  • Manufacturer’s Software (QYT CPS): Requires a slower baud rate (4800 or 9600) and must match the cable. Do not use the OEM software with random USB cables—it expects the Prolific PL2303 chip specifically in some cases.

    • If you want to build your own cable rather than purchasing a QYT USB cable , you will need a USB-to-TTL UART module.

    RJ45 connector

    The front microphone port is an and is primarily for the hand mic, but it also contains data pins. 1 Data Input 2 3 4 MIC Ground 5 6 GND (Ground) 7 +8V DC Out 8 Null / DATA Programming Important Cable Notes

    Tips:

    • Cause: Cross-wiring mistake. Most common: TXD/RXD swapped.
    • Fix: Swap the wires connected to RJ-45 Pins 3 and 6. If using the 5V from Pin 7, ensure the USB adapter’s ground is solid.
    qyt kt8900 programming cable pinout top
    qyt kt8900 programming cable pinout top