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BQ76952: BQ76952的SDA出现三角波

Part Number: BQ76952

Hi,TI的专家们:

 我BQ76952的I2C配置的400khz,I2C上拉电阻用的2K,

通讯过程中发现SDA偶发性会有个2V左右的三角波,

想要了解以下四个问题:

①请问这个三角波是?出现的原因是?

②有推荐改善方案吗?

③400K用的2K上拉合适吗?

④100Khz和400Khz更推荐哪个?原因?