imx8m nano ibis

[pareshvaland]

Hello ,

We are working with our vendor to do simulation of imx8m nano with ddr4.

We found that when we assign the ibis model of imx8m nano to component is shows the error for dqs1 p & n signals are not differential.

If we use imx8m mini ibis model than it will take the proper assignment of differential pair.

Please help us to resolve the issue.

in differential pin list of ibis model of nano two pins are missing.

[Yuri]

@pareshvaland 
Hello,

  What IBIS file was used for simulation ?

Regards,
Yuri.

[pareshvaland]

Attached ibis model is used by us for simulation.

Please let us know if any change is there or any other ibis model is require.

[pareshvaland]

HI Yuri,

Can you please help us to resolve IBIS model error ?

[Yuri]

@pareshvaland 
Hello,

  I think You can manually add in IBIS file (it is just a text) line for DQS1  in section
  [Diff_pin] after "A2 B2 0.140V 0ns NA NA"

G1 H1 0.140V 0ns NA NA

[Diff_pin] inv_pin vdiff tdelay_typ tdelay_min tdelay_max
L2 L1 0.140V 0ns NA NA
M1 M2 0.140V 0ns NA NA
AB4 AB5 0.140V 0ns NA NA
U2 U1 0.140V 0ns NA NA
A2 B2 0.140V 0ns NA NA

G1 H1 0.140V 0ns NA NA

B16 A16 NA NA NA NA
B14 A14 NA NA NA NA
B15 A15 NA NA NA NA
B17 A17 NA NA NA NA
B18 A18 NA NA NA NA
B11 A11 NA NA NA NA
B9 A9 NA NA NA NA
B10 A10 NA NA NA NA
B12 A12 NA NA NA NA
B13 A13 NA NA NA NA
B22 A22 150.000mV 0ns NA NA

Regards,
Yuri.