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(急)DM648 VCCMON管脚检测不到电压

Other Parts Discussed in Thread: TPS54610

板子是自己做的,电源芯片采用的TPS54610,利用PG管脚保证上电顺序,上电顺序是按datasheet来的,先3.3再1.8,最后1.2,IO口电源的监测管脚压值正常,但VCCMON一直没有电压,而且CCS连不上板。

请教高手们原因出在哪。

晶振是正常的,从SYCLK4输出的时钟是pll1输入时钟的1/4