Open ProgISP, select ATmega162 , and perform an "Erase" to clear the bricked firmware. Load Files: Load the Flash (.hex) file (the main firmware).
Select the matching .eep file and write it to the EEPROM memory.
: Ensure your cable uses the ATmega162 chip. Newer real HEX-V2 clones often use ARM/STM32 chips, which require different tools.
Locate the ISP pads on your VCDS circuit board. You must map the pins from your USBASP programmer directly to the corresponding pins on the ATmega162 chip. Refer to the standard mapping table below: USBASP Pin ATmega162 Pin Function Description Power supply GND RST Reset signal SCK SCK (Pin 1) Serial Clock MISO MISO (Pin 3) Master In Slave Out MOSI MOSI (Pin 2) Master Out Slave In
Before starting the reflash process, gather the necessary hardware and software tools. Hardware Requirements vcds atmega162 reflash 2021
: Software tools used to push hex data to ATmega microcontrollers.
: Your FTDI chip descriptors likely mismatch the flashed ATmega firmware version.
) (Check the documentation provided with your 2021 firmware files for the exact settings). Part 3: Updating the EEPROM (2021)
to wipe the chip and load a fresh, unlocked firmware image (typically a 2021-compatible loader version like 9.2). Fuse Settings Open ProgISP, select ATmega162 , and perform an
: Valid .hex (Flash) and .eep (EEPROM) files matching your hardware version. 📐 Pinout Mapping: USBASP to ATmega162
: Use software like AVRDUDE or the programmer's proprietary software to: Flash the Flash memory (.hex file). Flash the EEPROM (.eep file).
This is the most crucial step. Incorrect fuse bits will brick the chip. Ensure your fuses match the developer specifications provided with your software download package (typically configured to utilize an external crystal oscillator). Step 6: Reprogram the FTDI Chip (If Required)
Wait for the progress bar to finish and verify the success message. 🔌 FTDI Chip Realignment (Optional) : Ensure your cable uses the ATmega162 chip
Follow these phases sequentially to avoid bricking the microcontroller. Phase 1: Hardware Preparation
Before starting, you must identify your cable's hardware. The methods and tools below will only work for interfaces based on the ATmega162 chip. If your cable has an NEC, ARM, or STM32 microcontroller, these methods are not supported. Physically inspecting the printed circuit board (PCB) inside your cable is the definitive way to confirm it has the ATmega162 chip.
Carefully unscrew the OBDII plastic housing of your VCDS cable. Locate the ATmega162 chip. Nearby, you should see a row of small holes or solder pads labeled for ISP programming. You must map these pads to your USBasp programmer: (Power) GND (Ground) MISO (Master In Slave Out) MOSI (Master Out Slave In) SCK (Serial Clock) RST (Reset) Step 2: Connect the Programmer