L9963 Voltage measurement problem

[nicim]

I am testing the board with a 14s Li-ion battery, but I am unable to read the cell voltages or configure any register through the GUI. I shorted the X1 and P2 power supply inputs and supplied 12 V to both. This was the only setup in which I could get a green ACK indicator. The results were:

• Only cell 1 showed a voltage, but it was incorrect (5.8 V).
• When I try to write or read any register, I receive an ACK, but the register value does not remain as written.

I also tried to connect VBAT (P2-15) to C14 (by soldering R22) and GND (P2-9 or 23) to C0, but in this configuration the device does not start and the D13 LED does not blink. I tried several times, resetting all the power supplies in different sequences, but I still could not communicate with the device.

I have not been able to start the IC using only the battery or to read the correct voltage values. Any tips would be really appreciated.

[nicim]

Solution found: Hi, i have purchased an EVAL-L9963E-MCU and i am t... - STMicroelectronics Community

Basically, it was the jumper configuration. I followed exactly what is in AN5696, except for JHOT, which I set to 2–3 to measure the first cell correctly.