Cypress CyUsb3.sys Programmer’s Reference - KBA99226

Question:

Where do I get detailed information about Cypress’s CyUsb3.sys driver?

 

Answer:

CyUsb3.sys is a kernel-mode USB function driver, licensed for distribution ONLY with Cypress USB products and products that employ Cypress USB chips.

A detailed CyUsb3.sys Programmer’s Reference manual (CyUSB.pdf) is available in documentation folder of FX3 SDK. It can be found in the following default SDK installation path: 

64-bit Windows:

C:\Program Files (x86)\Cypress\EZ-USB FX3 SDK\1.3\doc\SuiteUSB

32-bit Windows:

C:\Program Files\Cypress\EZ-USB FX3 SDK\1.3\doc\SuiteUSB