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https://e2e.ti.com/support/interface-group/interface/f/interface-forum/773270/pcf8574-fscl-changed-from-400khz-to-100khz
大家好 如果我们问 PCF8574、您会介意吗？ 如果可能、您能告诉我们 fSCL 从400kHz 变为100kHz 的背景吗？ 此致、 大田松本
