: Includes a port for "rater" cables to perform boot testing on specific kits like CR4 and RJTAG. Driver Installation Guide (Windows 10/11)
Download the official (version 3.8 or newer) from a trusted source:
Click , choose Show All Devices , and click Have Disk .
Note: The VCP method (showing as COM port) is less common for modern JR V2 flashing tools. Most utilities now expect WinUSB or libusb access. Stick with Method 1 unless you are using legacy software. drivers jr programmer v2 install
Try clicking the Check Version or Read NAND buttons. If the software attempts the action without throwing a "Device Not Found" error, your installation is complete. Troubleshooting Common Errors "Device Descriptor Request Failed" (Error Code 43)
Open the menu and navigate to Update & Security > Recovery . Under Advanced startup , click Restart now .
, as it handles the older unsigned drivers much more reliably. wiring diagram : Includes a port for "rater" cables to
| Problem | Likely Cause | Solution | |---------|--------------|----------| | | Driver signature enforcement | Restart → Disable driver signature enforcement (Shift + Restart → Troubleshoot → Startup Settings → Disable driver signature enforcement) | | Device still shows as “Unknown” after install | Wrong chipset | Verify CH341 marking on PCB. Try Zadig (libusb-win32) if CH341 driver fails. | | COM port appears but programming fails | Incorrect software config | Ensure baud rate is not used – CH341 in SPI mode doesn’t need baud. Use SPI programmer software, not serial terminal. | | Device disconnects under load | USB power insufficient | Use powered USB hub. | | Linux: permission denied on /dev/ttyUSB0 | udev rule not applied | Add user to dialout group: sudo usermod -a -G dialout $USER (then logout/login) |
Extract the .zip or .rar folder to a dedicated directory (e.g., C:\J-Runner ). Locate the folder named common or drivers .
Use software like 7-Zip or WinRAR to extract the contents. Most utilities now expect WinUSB or libusb access
Your PC will boot into Windows normally, but will now allow "unsigned" drivers. 🔌 Step 3: Manual Driver Installation
This guide is tailored primarily for users, as this is where driver issues most commonly occur.