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您好,我这边使用DRV8825驱动42步进电机,我发现V3P3OUT只有3.0V,与手册上说的3.2-3.4V不一样,
现在情况是无法驱动42步进电机,VMA和VMB的电压是23.9V。AVREF和BVREF都是3.29F,ISENB和ISENA的电阻都是0.2R
nSLEEP和nRTEST现在都是3.3V,DECAY和DIR也是3.3V,STEP我们使用250KHZ,100KHZ,10KHZ,1KHZ,都无法驱动步进电机
MODE0,1,2都是悬空,没接任何东西
原理图如下: