Announcements
IMPORTANT: Cypress Developer Community is transitioning on October 20th. To learn more and be prepared for this change, check out our latest announcement.
cancel
Showing results for 
Search instead for 
Did you mean: 

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   
0 Likes
5 Replies
Anonymous
Not applicable
        Disable the EEPROM connect the device and then enable the eeprom and program it...   
0 Likes
user_287091
New Contributor
        But how can I disable the EEPROM if the device isn't even recognized by the computer?   
0 Likes
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????   
0 Likes
user_287091
New Contributor
        I am afraid, yes   
0 Likes
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....   
0 Likes