Forum Post: RE: TLV320AIC3254EVM-U Hardware device not connected.

Hi Nicolas,

For the TLV320AIC3254EVM-U boards that do not work, follow these steps to 'revive' them:

1. Get your USBfirmware files from http://www.ti.com/lit/zip/slac563.
2. Remove the board from the USB socket.
3. Short SDA and SCL lines by:
   1. shorting U3 pins 5 and 6, or
   2. shorting the sides of R6 and R7 that are connected to SCL and SDA.
4. Connect the EVM board to the USB socket.
5. After 5 seconds, remove the short. A 'Found new Hardware' wizard will appear. The driver is in the USBfirmware files obtained above.
6. Follow the instructions in AIC3254EVM-U Control Software (http://www.ti.com/lit/zip/slac349) under Tools > 'EEPROM Writer' > 'Upgrading the EEPROM from versions below 2.01'.
   1. In the software, start on STEP 4 (Page 2: DFU driver).
   2. In STEP 7 (Page 3: EEPROM Programming) of the software, ignore 'insert EEPROM jumper'.

Let me know if this helps.

Thanks,

J-