Step 1: Request a Unique Product ID (PID)


Step 2: Customize a Driver

Customize a driver using AN220: Driver Customization Wizard.
More information on the selections in the software can be found in the AN220 application note.

Step 3: Customize the USB MCU or CP210x Hardware

For CP210x devices, use AN721: CP210x/CP211x Customization Wizard. More information on the customizable fields in the AN721 software can be found in the AN721 application note.
For USB MCU devices, add the custom PID to the hardware descriptors and recompile the code.

Step 4: Test and Package the Driver

Test the driver on the desired operating system(s).
Note: On Windows 7 and Windows 8, installing a driver created by the AN220 software will require disabling driver signing, since the driver is uncertified after customization. More Information: Disabling Driver Signing. The driver will no longer require driver signing to be disabled after WHQL recertification.
Once the driver is tested, consider wrapping the driver installer (DPInst) created by the AN220 software into a custom installer that installs all software needed by the product. The DPInst installer can be placed in Quiet Mode to do this. More information can be found here: What is DPInst?

Step 5: Recertify the Driver

More information on this process can be found in AN807.

Step 6: Custom Pre-Programming Requests

To request that Silicon Labs pre-program a custom VID/PID number and/or serialize devices prior to shipment of CP21xx USB devices, contact your local Silicon Labs sales office or authourized representative.