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i.MX8MQ USB PHY "USB3_GLUE" registers

Question asked by Christian Mauderer on Jun 25, 2019
Latest reply on Jul 3, 2019 by Christian Mauderer

We have some trouble with USB Super Speed signal quality on a i.MX8MQ based custom board. I noted that in the Reference Manual Rev 1 (see [1]) there is a chapter " USB3_GLUE register description" with a lot of registers that most likely have an influence on the signal (like pcs_tx_deemph_6db or tx_vboost_lvl). Most of the registers are only described as "USB3.0 PHY Signal". Is there some more detailed description available somewhere? It seems that these are not standard names. At least I didn't find anything in the USB standard or the web with these names.


Thanks in advance for any hints.


With kind regards


Christian Mauderer


[1] i.MX 8M Applications Processor | Arm® Cortex®-A53, Cortex-M4 | 4K display resolution | NXP