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WSAL18899 – PCIe TO USB 3.2 Gen1 (B)/en

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Documentation notice: This technical documentation was independently rewritten from an archived supplier source. Check technical details and commands against the product version and manufacturer documentation before use.

Summary

The Waveshare PCIe TO USB 3.2 Gen1 (B) adapter (SKU WSAL18899) adds four high-speed USB ports to a Raspberry Pi Compute Module 4 IO board. It uses an onboard VL805 chip and is driver-free (plug-and-play). Power is supplied via the PCIe slot (12 V and 3.3 V) or alternatively through a 12 V DC header.

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Technical overview

  • Four USB 3.2 Gen1 ports with backward compatibility for USB 3.0, 2.0, and 1.1 devices
  • Power can be drawn either from the PCIe slot (12 V and 3.3 V rails) or from a separate 12 V DC header
  • Onboard VL805 controller enables immediate use without installing additional drivers
  • Designed specifically for the Raspberry Pi Compute Module 4 IO board; when used on a standard PC motherboard, connecting it via a PCIe extension cable is recommended
  • When mounting in a computer, the module must be secured with standoffs; otherwise vibration may prevent the system from recognizing the device
  • Verify that both the 12 V and 3.3 V power pins on the PCIe connector are functioning correctly before use
  • The adapter is plug-and-play and requires no driver installation
  • Technical support is available weekdays between 9 AM and 6 PM GMT+8

Notes and version constraints

  • Exact mechanical dimensions and mounting positions are not specified in the source – verify case compatibility before installation.
  • Whether the adapter is reliably recognized in other PCIe slots (e.g., x1/x4/x8/x16) is not confirmed in the source.
  • The specific firmware version of the VL805 chip and potential updates are not documented.
  • There is no information about certifications, warranty terms, or safety testing in the source file.

Source and revision record

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