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https://e2e.ti.com/support/interface-group/interface/f/interface-forum/1489992/tcal9539-q1-does-ti-have-io-expander-support-clock-stretching
工具与软件：
尊敬的 Expert：
祝你度过美好的一天！
TI 是否具有 IO 扩展器支持时钟延展？
谢谢！
此致！
LEO
对于所有 TI 的 I/O 扩展器、SCL 仅是输入；它们不会发起时钟延展。
