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i.MX8M mini MSCALE_DDR_Tool  - LPDDR4 Stress Test fails

Question asked by Simon Gräber on Apr 25, 2019
Latest reply on Apr 28, 2019 by Simon Gräber

Hi Everyone,

 

I made a design with i.MX8M mini (MIMX8MM6DVTLZAA) and LPDDR4 (MT53B512M32D2DS-062 AIT:C).

The schematic and the Layout are the same as on the EVK but we use another PMIC.

Now I'm trying to perform a stress test with MSCALE_DDR_Tool.

The calibration seems to work. I get "Success: DDR Calibration completed!!!" but wenn I start the stress test t0.2 fails:

 

 

If I perform a manual Write/Read to that address, it works.

 

I tried to reduce the Clock Cycle Frequency to 800 MHz but then calibration fails with different messages:

 

============ Step 1: DDRPHY Training... ============
---DDR 1D-Training @800Mhz...
Failed to find sufficient CA Vref Passing Region for CS 0 channel 0
PMU: ***** Assertion Error - terminating *****
[Result] FAILED

 

============ Step 1: DDRPHY Training... ============
---DDR 1D-Training @800Mhz...
[Process] End of CA training
[Process] End of initialization
[Process] End of read enable training
[Process] End of fine write leveling
[Process] End of read DQ deskew training
PMU: Error: Dbyte 0 nibble 0 rxClkDly passing region is too small (width = 0)
PMU: ***** Assertion Error - terminating *****
[Result] FAILED

 

Any ideas?

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