0 Replies Latest reply on Apr 9, 2010 4:21 PM by matthew.huffaker

    Tetrahub in Fullspeed -- does not power up ports when in fullspeed

    matthew.huffaker
              Hi,   
         
      I have a product that uses the Cy7C65640 TetraHub. In order to curb heat dissipation on the PCB, we decided to enable Fullspeed only. In our product, this works fine. But we are making a test for this PCB that connects to a computer in order to determine functionality.   
         
      When the EEPROM is not connected, the default Highspeed mode works well with the PC. But, for some reason, even though the Fullspeed works with the product we wish to integrate it with, when connected to the PC, none of the downstream ports power up.   
         
      Here's the Hex number that I feed the EEPROM:   
      D200000000000088FF326432A0   
         
      Most of the number is default or recommended.   
         
      Any help would be appreciated.   
         
      Thanks,   
         
      Matt