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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.<br />
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== Summary ==<br />
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.<br />
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== Related products at JW Tech ==<br />
* [https://shop.jw-tech.eu/p/WSAL18899 WSAL18899 – PCIe TO USB 3.2 Gen1 Adapter, for Raspberry Pi Compute Module 4 IO Board, 4x HS USB]<br />
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== Technical overview ==<br />
* Four USB 3.2 Gen1 ports with backward compatibility for USB 3.0, 2.0, and 1.1 devices<br />
* Power can be drawn either from the PCIe slot (12 V and 3.3 V rails) or from a separate 12 V DC header<br />
* Onboard VL805 controller enables immediate use without installing additional drivers<br />
* 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<br />
* When mounting in a computer, the module must be secured with standoffs; otherwise vibration may prevent the system from recognizing the device<br />
* Verify that both the 12 V and 3.3 V power pins on the PCIe connector are functioning correctly before use<br />
* The adapter is plug-and-play and requires no driver installation<br />
* Technical support is available weekdays between 9 AM and 6 PM GMT+8<br />
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== Notes and version constraints ==<br />
* Exact mechanical dimensions and mounting positions are not specified in the source – verify case compatibility before installation.<br />
* Whether the adapter is reliably recognized in other PCIe slots (e.g., x1/x4/x8/x16) is not confirmed in the source.<br />
* The specific firmware version of the VL805 chip and potential updates are not documented.<br />
* There is no information about certifications, warranty terms, or safety testing in the source file.<br />
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== Source and revision record ==<br />
* [https://www.waveshare.com/wiki/PCIe_TO_USB_3.2_Gen1_(B) PCIe TO USB 3.2 Gen1 (B) - Waveshare Wiki]<br />
* Source revision: 74705<br />
* Captured: 2026-09-01T03:46:11+00:00<br />
* SHA-256: <code>5cb050604395ca4c224f018a60d6bb88adf5eeceae183ff5ec8e0fd3d024a72c</code></div>JWTechPublisher