iMX8M Mini DDR4 x1 Calibration

chao — Thu, 15 Jul 2021 07:04:40 GMT

Hi,

We are trying to bring up our customer board which based on iMX8M Mini. The main components on the customer board are shown below:

CPU:MIMX8MM3DVTLZAA;

DDR:MT40A512M16LY:075E(Micron), x1, 16-bits, @1333MH;

PMIC:BD71847;

Next，we changed some parameters in "MX8M_Mini_DDR4_RPA_v15",

also, some other parameters in sheets have changed too, they are listed as following:

1. D43 in sheet "DDR stress test file" replaced by "0x14d032", since clock cycle freq is 1333MHz;

2.We use I2C2 to communicate with PMIC, and configure I2C port IO pads;

After we downloaded the .ds file and calibrated the DDR, it loged the following message,

============ Step 1: DDRPHY Training... ============
---DDR 1D-Training @1333Mhz...
[Process] End of initialization
PMU: Error: Dbyte 0 couldn't find the rising edge of DQS during RxEn Training
PMU: ***** Assertion Error - terminating *****
[Result] FAILED

We referenced the post with the theme "DDR_PHY programming issue on IMX8M board" (https://community.nxp.com/t5/i-MX-Processors/DDR-PHY-programming-issue-on-IMX8M-board/m-p/970078),

Unfortunately, it returned the same info "PMU: Error: Dbyte 0 couldn't find the rising edge of DQS during RxEn Training".

So, what is the root cause of the issue? How to fix it?

Re: iMX8M Mini DDR4 x1 Calibration

siaug18 — Mon, 13 Feb 2023 14:58:02 GMT

Hi Did you ever fix this ? I have the same issue

Re: iMX8M Mini DDR4 x1 Calibration

_angelo_ — Sat, 09 Dec 2023 21:14:11 GMT

i also have the same issue, would be nice to know if it was due to hw issues .

i.MX ProcessorsのトピックRe: iMX8M Mini DDR4 x1 Calibration

iMX8M Mini DDR4 x1 Calibration

Re: iMX8M Mini DDR4 x1 Calibration

Re: iMX8M Mini DDR4 x1 Calibration