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One-shot是EPWM tripzone模块的一个模式,你可以到TI官网下载SPRUG04A来学习Tripzone模块。主要功能就是当某些事件发生(比如过流,过压),会给TZ输入引脚一个触发电平,此时tripzone就可以直接封锁PWM的输出,以保证系统的安全,one-shot模式的意思,当tripzone使能封锁PWM后,必须复位寄存器才能重新使能PWM输出,否则就始终处于保护状态。