• State
  • Locked Locked
  • Replies 2 replies
  • Subscribers 62 subscribers
  • Views 125 views
  • Users 0 members are here
Support feedback
Options
Options
Related

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.

BQ76942EVM: BA7694202

Ramesh Gupta
Prodigy 120 points
Part Number: BQ76942EVM


Dear Sir,

I am working with BA7694202 -I2C Enable chip and using the same code(sluc701-STM32-I2C) which is  available on TI site but device is not sending the ACK  after sending the device address by Master MCU

Use MCU: STM32G473VCT6

I2C Speed: 400 Khz

R218 ,R219 ,R224, R225 Q26  is DNM and RST-DWN is shorted with ground.

R214,R215 is 4.7K

Voltage Across C108: 1.8 V DC

Kindly suggest and share any other code or idea so that i can move forwarded.---I have already developed 48V100Ah bms based on BQ7695203 -SPI based communication.

With Regards...

Ramesh Gupta

  • 0 in reply to Ramesh Gupta
    TI__Expert 4085 points

    Dear Ramesh,

    Do you know if your code is currently set up to use CRC? The BQ7694202 has CRC enabled by default so if the microcontroller is not sending the CRC bits, the device won't be able to read the message. Looking at the signal you sent (and what I'm assuming are the data bits), it looks like you aren't sending the CRC in your transmission. This means the device wouldn't be able to ACK it since it doesn't seem like a valid message. Could you specify which signals are what on the oscilloscope screenshot?

    Best,

    Asher Nederveld