Dear All,
Parameters of PCIe_PHY can be adjusted by changing the IOMUXC_GPR8 register settings as described in app note PCIe Certification Guide for i.MX 6 >> http://cache.freescale.com/files/32bit/doc/app_note/AN4784.pdf
Hardware based on iMAX6Q
And I'm using PCIE Gen 1.
In this documentation (See bellow) we can see;
Bit 31-25 represent 7'hxx TX launch amplitude swing_low value.
Bit 5-0 represent 6'hxx Gen 1 de-emphasis value.
When I measure the swing low and de-emphasis values from the eye diagram I got;
swing low = 400mV
de-emphasis = 3.5dB
Now I have to put above values to my GPR8 Register = 0x020e0020
Could you please tell me how to put above two values to this register according to it's bit pattern ? I couldn't see any documentation in NXP for this.
Regards,
Peter.
Hi Peter
I am not aware of additional documentation on this subject, but seems
one can try to test with low and high limits of register settings then make evaluation.
Best regards
igor
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