MSP430 PXIFG 中断标志位需要软件清除吗
推荐回答(3个)
PXIFG:中断标志寄存器。他的8个标志位标志相应引脚是否有中断请求有待处理。0:无中断请求, 1:有中断请求。其中断标志分别为PXIFG.0~PXIFG.7。应该注意的是:PXIFG.0~PXIFG.7共用一个中断向量,为多源中断。当任一事件引起的中断进行处理时,PXIFG.0~PXIFG.7不会自动复位,必须由软件来判断是对哪一个事件,并将相应的标志复位。另外,外部中断事件的时间必须保持不低于1.5倍的MCLK时间,以保证中断请求被接受,且使相应中断标志位置位
Each PxIFGx bit is the interrupt flag for its corresponding I/O pin and is setwhen the selected input signal edge occurs at the pin.
Each PxIFG flag must be reset with software
不会自动复位,必须由软件来复位
文档里写的很清楚 Each PxIFG flag must be reset with software
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