Ch351q Parallel Port Driver |verified| Jun 2026

Not directly. The CH351Q uses PCIe BAR (Base Address Register) mapping. Use a port redirector tool like PortTalk or a virtual port driver to map 0x3BC to the assigned address.

The CH351Q is a single-chip solution that converts a PCI Express interface into a standard parallel port (LPT). It is commonly found on add-on cards bearing names like "PCIe to Parallel Card," "LPT Printer Card," or "DB25 Male Expansion Card." ch351q parallel port driver

Disable Windows Update driver search: Go to Control Panel → System → Advanced → Hardware Installation Settings → Never download drivers from Windows Update. Then retry. Not directly

In an era where modern computers are sleek, wireless, and dominated by USB-C connectors, the concept of the "Parallel Port" seems like a relic of the distant past. However, for industrial automation engineers, CNC machinists, and hobbyists interfacing with legacy hardware, the parallel port (often called the LPT port) remains an essential tool. The CH351Q is a single-chip solution that converts

The is a specialized PCIe (PCI Express) to parallel port bridge chip manufactured by WCH (Nanjing Qinheng Microelectronics). It allows a modern computer with PCI Express slots to communicate with legacy parallel port devices. But without the correct driver, the CH351Q is just an inert piece of silicon.

The is the essential software bridge that connects a modern PCIe-based computer to decades of legacy parallel port hardware. While the installation process on Windows 10/11 can be challenging—especially with driver signature enforcement and I/O conflicts—the WCH-provided drivers are stable and reliable when installed correctly.