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您好,
请注意,当GRST置低电平的时候PRST也会置低,当 bridge control 寄存器(3Eh ) Bit 6 (SRST)置 1时,PRST 也会置低,具体见 8.4.30章节。
有人发现PCIe TX和RX信号的线连接错误会造成这种现象,请检查PCIe TX和RX信号线的连接:
也有人发现GND焊接不良会造成这种现象,您测试几块设备是这种现象?请多测试几块以排除焊接问题: