AnsweredAssumed Answered

PCIe Mini linkup fail issue

Question asked by zhao cuiqin on Dec 3, 2018
Latest reply on Dec 5, 2018 by igorpadykov

Dear NXP,

Under linux  Linux version 3.0.35_B01_V1.0, a imx6q-like board is connected to a PCIE-mini interface wlan RTL8192EE. Checked the differential clock is about 100MHz, the power and reset is supplied. Pcie has been configurated like that:

[    6.457696] iMX6 PCIe PCIe RC mode imx_pcie_pltfm_probe entering.
[    6.464063] _clk_pcie_enable!!
[    6.467207] PCIE: imx_pcie_pltfm_probe card_reset.
[    6.578918] PCIE: imx_pcie_pltfm_probe start link up.
[    6.584062] PCIE: imx_pcie_pltfm_probe add_pcie_port.
[    7.195101] link up failed, DB_R0:0x00ea5800, DB_R1:0x08200000!
[    7.201138] IMX PCIe port: link down with power supply 1!

I tested the PCIE_TXP/PCIE_TXN pin signal waveform, as the attached file pcie.jpg. The amplitude peak is 400mV.

Is this waveform correct ?Could you give us some advise about this issue?


Best Regards!