完全按照官方推荐的电路图和原理图做的板子，焊上DRV10983-Q1芯片后，上位机无法读写寄存器，芯片的1.8V引脚输出正常，3.3VLDO输出异常,大概电平掉至1.45V,5V输出的step-dowm也输出异常，只有800mv的电压，电感上电流没有在斩波，以为是芯片问题，换了芯片还是这样请问为什么？
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