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DRV8353R: DRV8353的使能时FAULT脚会产生负脉冲(尖峰)

Part Number: DRV8353R
Other Parts Discussed in Thread: DRV8301, DRV8353

如图:VCC _VM为DC24V,NFAULT上拉电阻2.2k,在EN脚使能(拉高)时,NFAULT脚会产生一个负脉冲,造成MCU中断,通过SPI读取内部数据,并没有具体的故障位,测试图形见图2。请教可能的原因?

      

            图1原理图                                                                                             图2 测试图