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.

[TCA9535]INT中断信号上电一直为低

Other Parts Discussed in Thread: TCA9535

TI大咖

     我在测试时候发现上电后TCA9535这个中断管脚信号一直为低,造成中断功能异常,手动把这个信号与主控MCU断开后,再接上 INT信号就正常了。后续功能都正常。

所以我想请教下,刚刚上电后INT信号为什么输出的是低电平?如果我不手动断开干预,这个信号一直为低,造成中断功能失效。

有什么改进方法吗?

下面是我的电路。