This thread has been locked.
If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.
https://e2e.ti.com/support/interface-group/interface/f/interface-forum/661794/pca9518-how-to-connect-expscl-and-expsda-when-we-don-t-use-it
大家好，团队
如果我们想用PCA9518替换PCA9516。
如果我们不在 PCA9518上使用EXPSCL和EXPSDA，我们是否可以浮动？
嗨Ray，
EXPSCL和EXPSDA应连接到上拉电阻器。 如果噪声与这些引脚耦合，则让这些引脚浮动可能会导致主I2C线路上出现故障/闩锁。
谢谢！
-Bobby
