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28335中TZ状态如何读取?



为了提高抗干扰能力,在TZ中端中再延时读取相应GPIO口是否为低电平,如果读取结果仍为低电平则认为确实有故障发生。

测试时,TZ1中断发生时,能延时读到GPIO12的低电平状态;但TZ4中断发生时,读取GPIO15的电平状态为高电平(硬件电路确保

为低电平),不知GPIO12 和 GPIO15作为TZ输入脚用有什么区别?为什么TZ1中断发生时能读到GPIO12的低电平状态,而TZ4中断

发生时读不到GPIO15的低电平状态?