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MSP430 Fx2xx芯片手册关于IO的问题



RT:在手册8.1 Digital I/O Introduction中,第二段最后一句:All P1 I/O lines source a single interrupt vector, and all P2 I/O lines source a different, single interrupt vector. 没能理解清楚是什么意思。

根据之前的理解是,P1和P2口分别只有一个中断源,利用中断标志来区分哪个引脚触发了中断,上面“P2 I/O lines source a different”,为什么和P1的不一样?