topic Re: Request for i.MX 8ULP LPDDR4x RPA Tool Version 23 in i.MX Processors

Request for i.MX 8ULP LPDDR4x RPA Tool Version 23

YashParekh — Wed, 30 Jul 2025 11:10:51 GMT

Hello,

I'm currently working on DDR calibration for a custom board based on the i.MX 8ULP and using LPDDR4x memory. I'm using ddr tool version 24 downloaded from this link:
https://www.nxp.com/webapp/sps/download/preDownload.jsp?render=true

In the tool, I am checking with imx8ulp_evk_9x9 for this I have modified the BoardDataBusConfig file to match the bit mapping based on our i.MX 8ULP schematic. After generating the stress test file and running DDR calibration with the NXP i.MX DDR Tool, I encounter the following error:

[ERROR] DFI error(0x4)!!!
[INFO] Please check data bit mapping

Interestingly, in the downloaded DDR Tool package, there's a pre-configured .ds file located at:
mx8ulp_ddr_tool/scripts/lpddr4x/evk9x9_mx8ulp_lp4x_2gb_528m_96m_48m_1cs_v24_debug

When I run DDR calibration using that .ds file, it completes successfully. I noticed that the file mentions version 23 of the RPA tool.

Therefore, I would like to request access or where can i find version 23 of the i.MX 8ULP LPDDR4x RPA tool, So i can check in my custom board also.

Thank you!

Re: Request for i.MX 8ULP LPDDR4x RPA Tool Version 23

JorgeCas — Thu, 31 Jul 2025 16:17:14 GMT

Hello,

I researched internally but RPA version 23 is not available.

Since version 24 is the latest release I suggest you use it.

Best regards.

Re: Request for i.MX 8ULP LPDDR4x RPA Tool Version 23

YashParekh — Fri, 01 Aug 2025 09:30:45 GMT

Hi,

I am currently using RPA version 24 for DDR calibration on my custom board, which uses 16EM16-M4JMW8A-GA01 Kingston memory. However, I am getting the following error:

[ERROR] DFI error(0x4)!!!
[INFO] Please check data bit mapping

Interestingly, when I run the same RPA tool on the EVK, I see the same error initially, but calibration works if I use the pre-built .ds file:
mx8ulp_ddr_tool/scripts/lpddr4x/evk9x9_mx8ulp_lp4x_2gb_528m_96m_48m_1cs_v24_debug.ds.

When I compared the .ds file generated from RPA v24 with the pre-built debug .ds file, I noticed differences in the following register values:

RPA v24 generated file:
memory set 0x2E062480 32 0x51113031 # DENALI_PI_288
memory set 0x2E062484 32 0x31400404 # DENALI_PI_289
memory set 0x2E062488 32 0x04511130 # DENALI_PI_290
memory set 0x2E06248C 32 0x34315224 # DENALI_PI_291
memory set 0x2E062490 32 0x04041111 # DENALI_PI_292
memory set 0x2E062494 32 0x11303140 # DENALI_PI_293
memory set 0x2E062498 32 0x40040451 # DENALI_PI_294
memory set 0x2E06249C 32 0x51113031 # DENALI_PI_295
memory set 0x2E0624A0 32 0x31522404 # DENALI_PI_296
memory set 0x2E0624A4 32 0x04111134 # DENALI_PI_297

Pre-built EVK debug file:
memory set 0x2E062480 33 0x51113031 # DENALI_PI_288
memory set 0x2E062484 34 0x31400404 # DENALI_PI_289
memory set 0x2E062488 35 0x04511130 # DENALI_PI_290
memory set 0x2E06248C 36 0x34315224 # DENALI_PI_291
memory set 0x2E062490 37 0x04041111 # DENALI_PI_292
memory set 0x2E062494 38 0x11303140 # DENALI_PI_293
memory set 0x2E062498 39 0x40040451 # DENALI_PI_294
memory set 0x2E06249C 40 0x51113031 # DENALI_PI_295
memory set 0x2E0624A0 41 0x31522404 # DENALI_PI_296
memory set 0x2E0624A4 42 0x04111134 # DENALI_PI_297

My questions:

- What is the significance of these increasing values (33, 34, 35 …) instead of 32?

I tried modifying my custom board’s .ds file in a similar way, but I still see the same error.

- I have verified the schematic and confirmed the data bit mapping is correct.

- On my custom board, the debug UART pins are different, so I updated the .ds file accordingly.

Could you please guide me on:

- What else I should check,

- Why this DFI error occurs, and

- How to resolve it?

Your guidance would be really helpful in resolving this issue.

Thanks for your support.

Re: Request for i.MX 8ULP LPDDR4x RPA Tool Version 23

PaulBudich1 — Wed, 12 Nov 2025 15:51:48 GMT

We have a similar error, @YashParekh have you solved it?