i.MX 8QM PCIe configuration questions

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i.MX 8QM PCIe configuration questions

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MarkDrzymala
Contributor III
  • There appear to be 3 PCIe modules (PCIe0, PCIe1, and PCIe_SATA0). What bus/lane configurations are available? Ex: Can I set up PCIe0 as a single lane bus, and PCIe1 and PCIe_SATA0 as a 2-lane bus?
  • These pins appear tied to the PCIe0 and PCIe1 modules respectively, is this true? Or are they only part of the PCIe1 module as called out in table 9-11 of the i.MX 8QM Processor Reference Manual?
    • PCIE_CTRL0_WAKE_B
    • PCIE_CTRL0_PERST_B
    • PCIE_CTRL0_CLKREQ_B
    • PCIE_CTRL1_CLKREQ_B
    • PCIE_CTRL1_PERST_B
    • PCIE_CTRL1_WAKE_B
  • Are these wake/perst/clkreq features not available on the PCIe_SATA0 module?

How does one choose between the SATA or PCIe modes of the PCIe_SATA0_RX/TX pins? A particular register setting?

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