T1042 - PCIe link Loopback Test

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T1042 - PCIe link Loopback Test

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skittikh
Contributor I

Using T1042, would like to test the PCIe links by loopback the TX to RX.  Is there any internal registers of T1042 that we can use to verify whether the links are working?

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ufedor
NXP TechSupport
NXP TechSupport

Digital loopback can be enabled by setting corresponding SerDes_LNnTCSR3[LPBK_EN]=0b01.

External loopback can be tested in application mode using external loopback add-in card or by connecting TX to RX signals through AC coupling capacitors at the backplane.

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