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https://e2e.ti.com/support/interface-group/interface/f/interface-forum/592531/pca9538-pca9538-int-pin-application
尊敬的先生：
PCA9538 引脚13 (/INT)如果不使用，可以连接到 GND？
谢谢！
您好 Steven、
如果 INT 引脚未被使用、您可以将其接地。
－弗朗西斯·胡德
