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USB Low-Full-High Speed Peripherals

user_287091
New Contributor
        Hello,   
   
   
I recently programmed a FX2 EZ-USB EEPROM with a firmware that had some warnings, mainly linking problems. Now the device is not recognized anymore by the computer; "unknown device".   
   
In that case, how can I reprogram the EEPROM with an old working firmware?   
   
thank you   
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5 Replies
Anonymous
Not applicable
        Disable the EEPROM connect the device and then enable the eeprom and program it...   
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user_287091
New Contributor
        But how can I disable the EEPROM if the device isn't even recognized by the computer?   
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Anonymous
Not applicable
        in the dvk they have switches to disable the EEPROM (hardware disabling)... are you using a custom board with no jumper or switch to disconnect the EEPROM from the i2c line????   
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user_287091
New Contributor
        I am afraid, yes   
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Anonymous
Not applicable
        FX2LP if it finds a valid first byte it will load the EEPROM image... to stop that you'll have to take care that the EEPROM and FX2LP do not communicate during boot-up.... either remove the EEPROM from the line or manipulate the EEPROMs power or address lines....   
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