Flashing tools (like the Montage "Upgrade.exe" or GX6605S Downloader) usually default to . However, some older boards or specific recovery modes require a slower speed to prevent the "Receive Full" error. Go to Device Manager > Ports (COM & LPT) . Right-click your Serial Port > Properties > Port Settings .
Here is a review of what this error means, why it happens, and how to fix it based on common causes. What the Error Means Bootrom Error: Flashing tools (like the Montage "Upgrade
: Close any other programs (like Serial Monitors or Putty) that might be trying to use the same COM port. Right-click your Serial Port > Properties > Port Settings
| Check | Action | |-------|--------| | | Ensure host matches BootROM default (often 115200 or 921600). Mismatch = garbage data. | | Flow control | Disable hardware flow control (RTS/CTS) at BootROM stage – it's usually not supported. | | RX line noise | Disconnect/reconnect GND. Use shielded cable if in noisy environment. | | Host software | Stop any terminal auto-send (e.g., line feeds, CR, timestamps) before device powers on. | | Boot sequence | Power device first, then connect UART RX – or vice versa depending on SoC (check datasheet). | | Check | Action | |-------|--------| | |