• State
  • Locked Locked
  • Replies 2 replies
  • Subscribers 63 subscribers
  • Views 147 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

BQ79600-Q1: Device disconnecting when choosing the SPI option

Jonathan Navor
Expert 7765 points
Part Number: BQ79600-Q1
Other Parts Discussed in Thread: BQ79616, USB2ANY

Hi team,

Good day! I'm posting this in behalf of the customer. Here it is. 

I am attempting to work with BQ79616 for some battery management application and have employed BQ79600 bridge interface as I am planning to employ SPI peripheral in my future host design for now I wanted to evaluate the BQ79616 functionalities via the BQ79600 bridge using the USB2ANY hardware(running firmware ver "USB2ANY_3_1_1_14") interfacing to my PC that is running the BQAutoEval tool(ver 1.0.4).

Observation 1:- When I have the above mentioned setup with BQAutoEval tool configured to UART(by selecting BQ79600 UART for bridge and BQ7961x for stack) and the jumpers on the BQ79600 evaluation board changed to support UART, I am able to wake the bridge and stack with this I am able to auto address, start polling and retrieve cell voltages. 

Observation 2:- When I have the above mentioned setup with BQAutoEval tool configured to SPI(by selecting BQ79600 SPI for bridge and BQ7961x for stack) and the jumpers on the BQ79600 evaluation board changed to support SPI, I am able to wake the bridge and the stack device but the moment I hot auto address the USB2ANY device gets disconnected not only am I unable to auto address but I am also unable to maintain connection after hitting auto address button on the tool

Observation 3: - I disconnected the USB2ANY device from the rest of the hardware setup while having all the settings corresponding to SPI and pressed the auto address button, even in this case the USB2ANY device is disconnecting as indicated by the BQAutoEval tool. This is not the case when the tool settings corresponds to UART.

Please do let me know if you need more examination, H/W setup images or screen shots from the tool etc.

Best regards,

Jonathan

  • 0
    TI__Intellectual 1760 points

    Hi Jonathan,

    This behavior is very strange to me. I am not able to replicate anything similar on my bench. I am assuming based on the use of the USB2ANY that the customer is using a BQ79600 EVM supplied by TI and not their own hardware development?

    To help debug this issue, I would like to see scopeshots of RX, TX, nCS and SCLK while the board is configured for SPI. If they would also be willing a top down image of the '600 when configured for SPI would also be appreciated as the configuration of the jumpers are often one of the most common mistakes. However, it seems they are already aware of this so I think that is not likely the cause.

    Thanks,

    Geoff

  • 0 in reply to Geoffrey Grimmer
    TI__Expert 7765 points

    Hi Geoff, 

    We'll be back for you when our customer had provided the necessary information for you to continue debugging.

    Thank you so much for the support.

    Best regards,

    Jonathan