Firmware Update using Program Card 1. Contacts of the receiver used for programming: 2. Contacts of the Program Card used for programming: 1. Rx 2. Tx 3. NC 4. VCC_T 5.
3. Connection diagram: Install bind plug between THRO and ELEV POWER 5. 4. 3. 2. GND VCC_T NC Tx 1. Rx GND Power Signal Orange Program Card Receiver R620x-R1220x V3 AUX2 AUX1 GEAR RUDD ELEV AILE THRO BND Sat 1 1 2 3 Sat 2 1 2 3 USB GND 5VDC (From BEC or separate power supply ) To PC 4.
5. Launch «R620_R1220_V3_230720.
Firmware Update using USB-UART adapter In order to use USB-UART adapter instead of Program Card you will need to invert signal coming from Bind pin of the receiver to Rx pin of the adapter. s.Bus inverter circuit or similar will perfectly work for thispurpose. Below are a simple schematic circuit for your reference: The rest is the same as with Program card. When connected to the PC you will have to manually select a correct COM port that is assigned to USB-UART adapter.
