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TDA4VM: Does i2c master in mcu domain support clock stretching

lify
Intellectual 290 points
Part Number: TDA4VM

dear ti

    In mcu domain, i use I2C2 communicate with slave device，now i think the controller aways die。The scenario is like this: after reading or writing some registers，slave will pull down sda scl at the same time，after about 32Ms，sda  scl will pull high again。After that，the sda scl aways has no data， although i send data，but the bus always high，or the signal is abnormal， can't communicate normally。

how to debug  this issue？

by the way，does  i2c2 master support clock stretching?

thanks a lot!

  • 0 in reply to lify
    Intellectual 290 points

    Strictly speaking, it is not pulling down and pulling up at the same time，You can refer to the diagram I provided。  I‘m almost sure that ’this pull down and pull up is initiated by slave.

    then my question is ，the controller is unable to withstand this pull-down and pull-up action? The controller seems to have died after this，As I said earlier，the sda scl aways has no data， although i send data，but the bus always high，or the signal is abnormal， can't communicate normally。