Hello,
I am using a Bq30z554 for SAFT FRANCE with the last software version bqEVSWSetup00.09.92.
To test this bq and the evaluation software, i connected a 3-cell pack to the circuit module , a SMBus cable to the EV2300 module and a USB cable as mentionned in the document SLUUA36
However, while starting the evaluation software I got this communication problem : VB_T2H_NACK.
From the different documents and forums on TI, I tried some tests to pass through this communication problem such as :
- testing an other EV2300 module --> no result
- testing an other USB cable --> no result
- Ohm the 4-pin USB cable --> electrical connection OK
- Check for bent or contaminated pins on the EV2300 SMBus connector --> no contamination or bent
- Kick start the EVM by connecting power momentarily to PACK+ and PACK - to simulate a charger insertion --> no result
As I took this project over a Junior engineer, the last software version and TI USB Drivers were yet installed on the computer I use.
Can someone help me to go through these communication problems?
Thanks in advance,
Sincerely
Thomas Bacher