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目标 ：网口扩展
ks8893m与F28M35的连接 ，修改引脚功能后存在信号冲突问题 ，98引脚MII_COL 和 9引脚C_SPI_MI。求修改方案（新手，接手别人的工作）
你是说SPI功能冲突吗？
