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1、FPGA与AM3359之间采样GPMC通信，
2、我的FPGA用的单独的3.3V的电源芯片(TPS54618)，而AM3359的GPMC用的TPS65217b的3.3V供电，那么AM3359与FPGA通信时，引脚可以直连吗？
可以直连，但是TPS54618的使能最好能由TPS65217控制，以保证FPGA在AM3359上电之后再上电，保证上电顺序
fpga通过gpmc和am3359相连，上电顺序很重要，要不然会影响am3359的启动模式，而无法正常启动
