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BQ76952: BQ76952 communicate issue

Star Xu
Genius 9645 points
Part Number: BQ76952

Hi

I have a query need your help.

I use the IO port to simulate IIC. When the interval between each instruction is more than 50us, it can communicate normally.

When the interval is less than 50us, it cannot communicate normally. When the interval is less than 5us, it cannot communicate at all. Is it something that needs to be configured on the BQ76952?

Waiting for your reply.
Thanks
Star

  • 0
    TI__Mastermind 23091 points

    Hello,

    We will get back to you on Monday, Tuesday the latest.

    Regards,
    Jose Couso

  • 0
    TI__Mastermind 27860 points

    Hello Star,

    What are their communication settings? For frequencies higher than 100-kHz they should use the I2C Fast. For frequencies below or at 100-kHz, they should use normal I2C.This is changed in DataMemory>Settings>Comm Type. There is a description of these in Table 9-1. Comm Type Data Memory Settings of the Technical Reference Manual.

    Additionally, the timing requirements are listed in Section 7.27 Timing Requirements - I2C Interface, 100kHz Mode and Section 7.28 Timing Requirements - I2C Interface, 400kHz Mode of the datasheet. They must make sure that they meet these requirements.

    Best Regards,

    Luis Hernandez Salomon