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: Many versions use Renesas (formerly NEC) chipsets, such as the µPD720200 . Driver & Software Details
If the two main methods above don't work, consider these additional steps:
The "XH-39.0" refers to version 2.1.39.0 of the Renesas Electronics USB 3.0 Host Controller driver. It is designed to act as the bridge between your operating system and the hardware on the PCI-e expansion card. Target Chipsets: Renesas/NEC uPD720200 and uPD720200a.
Method 1: Automated Deployment via Windows Update (Windows 10 / 11)
Locate setup.exe or XH39_Install.exe . Right-click it and select Run as administrator .
During installation, macOS may prompt you to allow a system extension. Go back to Privacy & Security and click Allow next to the driver developer's name.
This driver is not signed for Windows 11 versions prior to 22H2. If you are on an older build, you will need to disable driver signature enforcement temporarily.
The driver translates standard operating system commands into the specific serial or parallel protocols required by the XH-39.0 hardware chipset. Installing it allows your PC to map the connected hardware to a usable communication port (such as a COM port in Windows or a tty device in Linux). Step-by-Step Installation Guide
