MosChip PCI Serial Port Driver

The MosChip PCI Serial Port driver helps Windows recognize a compatible MosChip-based PCI serial adapter and communicate with devices connected through its COM ports. It enables serial connections for equipment such as modems, industrial controllers, and legacy peripherals. For Windows 11, 10, 8, or 7, choose a driver package that matches both your adapter’s hardware ID and your Windows architecture.

Key Features

• COM port recognition: Allows Windows to identify supported serial ports on the PCI adapter and make them available to compatible applications.
• Serial device communication: Provides the interface needed to exchange data between your computer and connected serial equipment.
• Connection settings: Supports configuration of serial parameters, such as baud rate, parity, data bits, and flow control, where available through the driver or application.
• Device management: Integrates with Windows Device Manager so you can check driver status, identify assigned COM ports, and troubleshoot detection issues.

How to Install

1. Identify your adapter and Windows version. Open Device Manager and locate the MosChip PCI Serial Port or the unidentified controller. Under Properties > Details, select Hardware Ids to help confirm the correct driver. Also check whether your Windows installation is 32-bit or 64-bit.

1. Download a matching driver package. Verify that the package explicitly supports your adapter and your version of Windows 11, 10, 8, or 7. Compatibility can vary between MosChip chipsets and adapter manufacturers.

1. Extract and install the driver. If the download is compressed, extract it first. Run the included installer with administrator permissions. If no installer is provided, right-click the device in Device Manager, select Update driver, and browse to the extracted folder.

1. Restart if prompted and verify detection. Return to Device Manager and check that the serial port appears without a warning symbol, typically under Ports (COM & LPT). Note the assigned COM port number.

1. Configure and test your serial connection. Select that COM port in your application and match its communication settings to those required by the connected equipment. If communication fails, check the cable, port selection, and serial settings before reinstalling the driver.

Although listed in the Network category, this device provides serial connectivity rather than a standard Ethernet or Wi-Fi connection. Correct driver selection is especially important when using older PCI hardware with newer Windows releases.

Common Issues and Fixes

• Install fails or rolls back: Run the MosChip installer as administrator, disconnect other serial adapters, and reboot before retrying. If it still fails, update the driver manually in Device Manager via “Update driver” > “Browse” to the downloaded INF folder.
• Device not detected: Check Device Manager for an unknown “PCI Serial Port” or yellow warning. Reseat the PCI card, try another slot, and confirm the port is enabled in BIOS/UEFI. Install the driver before connecting serial peripherals.
• Version conflicts or wrong COM port: Remove any older MosChip/Prolific serial drivers, reboot, then install the current package. In Device Manager > Ports, open the MosChip port’s Properties > Port Settings > Advanced to assign a free COM number.