Determining chip revision

Version 1
    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..