Why the LPDDR4 channel connection interchanged with i.MX8M Mini in the reference design?

[m_c]

In data sheet, DRAM_AC04 <-> CK_t_A and DRAM_AC24 <-> CK_t_B, but in the reference design,  DRAM_AC04 <-> CK_t_B and DRAM_AC24 <-> CK_t_A?

[art · Accepted solution]

In the i.MX8MMini EVK design, the LPDDR4 channels _A and _B are completely swapped with regard to the LPDDR4 chip. This is done for the PCB routing convenience.

Best Regards,

Artur

[siegfried_buerger]

I am not really sure, but I´ve noticed:

If you do not connect the pins as in the reference design, there will be crossings at the end, in the routing.

So i think it´s just because it´s better for the layout.