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我现在使用了DP83848和DP83849IFVS两款芯片,对于STRAP OPTION引脚有点疑惑,这个配置引脚理论上是不能直接连接在VCC或GND上,但是我FPGA的输入引脚默认状态就是VCC或GND的值,而且在我连接RXD1 RXD0(PHYAD2 PHYAD1)到FPGA输入引脚时,也确实更改了默认硬件PHY地址0001的配置,变成了0111。我不希望对默认配置进行改变,也需要这个引脚与我FPGA相连,我该怎么处理?难道使用单片机不存在这样的问题吗?