Silicon Laboratories C8051F90 Series, User Manual

C 8 0 5 1 F 9 1 x / 9 0 x

6

Rev. 0.2

4.  Click on the 

Get LIC via Internet...

 button to open the Obtaining a License IDE Code (LIC) window.

5.  Press 

OK

 to open a browser window to the Keil website. If the window doesn’t open, navigate to 

www.keil.com/license/install.htm

.

6.  Enter the Silicon Labs 

Product Serial Number

 printed on the CD-ROM, along with any additional required 

information.

7.  Once the form is complete, click the 

Submit

 button. An email will be sent to the provided email address 

with the license activation code.

8.  Copy the License ID Code (LIC) from the email.

9.  Paste the LIC into the 

New License ID Code (LIC)

 text box at the bottom of the License Management 

window in µVision4.

10.  Press the 

Add LIC

 button. The window should now list the 

PK51 Prof. Developers Kit for Silabs

 as a 

licensed product.

11.  Click the 

Close

 button.

4.4.  CP210x USB to UART VCP Driver Installation

The MCU Card includes a Silicon Labs CP210x USB-to-UART Bridge Controller. Device drivers for the CP210x
need to be installed before the PC software can communicate with the MCU through the UART interface. Use the
drivers included CD-ROM or download the latest drivers from the website (

www.silabs.com/interface-software

).

1.  If using the CD-ROM, the 

CP210x Drivers

 option will launch the appropriate driver installer. If downloading 

the driver package from the website, unzip the files to a location and run the appropriate installer for the 
system (x86 or x64). 

2.  Accept the license agreement and follow the steps to install the driver on the system. The installer will let 

you know when your system is up to date. The driver files included in this installation have been certified by 
Microsoft.

3.  To complete the installation process, connect the included USB cable between the host computer and the 

COM PORT

 USB connector (J5) on the MCU Card. Windows will automatically finish the driver installation. 

Information windows will pop up from the taskbar to show the installation progress.

4.  If needed, the driver files can be uninstalled by selecting 

Windows Driver Package—Silicon 

Laboratories...

 option in the 

Programs and Features 

window.