Determining chip revision

Question: How can I determine the revision of the AN21xx EZ-USB chip that I have?

 

Answer:

The stencil on the part can identify the chip revision, for example:

                                                           
    EZ-USBTM     
    AN2131QC     
    0021     
    ENY0876    KOREA


The leading E in the last line indicates a revision E part in this example.


You can also use the EZ-USB Control Panel to determine chip rev by pressing the Get Dev button. The bcdDevice field displays the chip rev as follows:

0x4 = Rev E, 0x3 = Rev D, etc..