请问中断中polarity=0和2.有什么区别吗？怎么都是下降沿？
时间：10-02
整理：3721RD
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Polarity This read/write bit determines whether interrupts are generated on the rising edge or the
falling edge of the signal on the pin.
00 Interrupt generated on a falling edge (high-to-low transition)
01 Interrupt generated on a rising edge low-to-high transition)
10 Interrupt is generated on a falling edge (high to low transition)
11 Interrupt generated on both a falling edge and a rising edge (high to low and low to high
transition)
falling edge of the signal on the pin.
00 Interrupt generated on a falling edge (high-to-low transition)
01 Interrupt generated on a rising edge low-to-high transition)
10 Interrupt is generated on a falling edge (high to low transition)
11 Interrupt generated on both a falling edge and a rising edge (high to low and low to high
transition)
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