Ch351q Parallel Port Driver Jun 2026

By ensuring you have the latest driver, the CH351Q parallel port card offers a reliable way to maintain legacy connectivity on modern computing systems.

WCH (Nanjing Qinheng Microelectronics) official site ( wch-ic.com or wch.cn ).

Standard 32-bit PCI interface, compliant with PCI Local Bus Specification 2.3.

You can also find the driver on the mini-CD that often ships with the retail PCI card. However, it's always best to download the latest version from WCH to benefit from bug fixes and expanded OS support. ch351q parallel port driver

If you downloaded a zip archive containing raw driver files ( .inf , .sys ), follow these steps: Open the Start menu, type , and press Enter.

The CH351Q competes with other solutions:

Use the drop-down menu to reassign the port number (e.g., changing it from LPT3 to LPT1). Click and restart your computer to apply the changes. Enabling EPP or ECP Modes By ensuring you have the latest driver, the

Note the assigned port number in parentheses, such as or (LPT3) . Configuring Advanced Port Settings

Look for an entry corresponding to "Nanjing Qinheng" or a device labeled "Parallel controller."

Open the computer case and insert the CH351Q PCI card firmly into an available PCI slot. You can also find the driver on the

CH351Q is a single, specific chip model. However, the chip can be configured via its firmware to operate in different modes (e.g., dual-serial or single-parallel). The datasheet may refer to different configuration variants as CH351Q_S , CH351Q_P , or CH351Q_X .

The CH351Q requires specific drivers to translate PCI bus signals into standard parallel port communication. Without the driver, the hardware will appear as an "Unknown PCI Device" or "PCI Parallel Port" with an error code in Device Manager. Official Source : The driver is provided by WCH (Qinheng Microelectronics) Supported Systems

Click , navigate to the unzipped folder containing the CH351Q driver files, and click Next .

Right-click your CH351Q parallel port device and select . Navigate to the Port Settings tab.

Always source drivers directly from the manufacturer to avoid malware or corrupted files.