1 Reply Latest reply on Jul 11, 2012 9:53 AM by rama.sai.krishna.vakkantula

    firmware download for Cy7C680-13A

    gigin.jose

      Hi, 

         

      I have a USB device designed out of Cy7C680-13A usb high speed controller. The design uses an EEPROM IC to store the device firmware. The address lines for EEPROM is hard wired to 0,0,1 for A2, A1, A0 respectively. 

         

      Using the Cypress tools, can I download any test firmware directly to the usb controller. After testing the device with the test firmware, will the system revert back to the original firmware from EEPROM IC after a hardware reset. 

         

       

         

      How can I download the firmware through USB in case I am working on other platforms like ARM9 linux based usb hosts. ? 

         

      Thank You

         

      GIGIN JOSE

        • 1. Re: firmware download for Cy7C680-13A
          rama.sai.krishna.vakkantula

           If you connect a plain EEPROM (without any image file in it) to the Cy7C680-13A usb high speed controller then it enumerates and you can download the code into the RAM using CyConsole. Now if you want to program the EEPROM you can do that. Once you give the hard reset, from that point it is going to get the code from the EEPROM.      

           

             

          Then you should be doing two things to enumerate as a Cypress default device.     

           

             

          1. You should be having the firmware to support EEPROM erase functionality. You can initiate this using a vendor command.     

           

             

          2. you can short the SCL line to ground while you connect your board to the PC. Then it enumerates as a default device and you can re-program it.     

           

             

          Coming to the tools on Linux platform, I will update you ASAP.     

           

             

          Regards,     

           

             

          sai krishna.