Fix TANARO RAM instabilities (!2) · Merge requests · SECO Northern Europe / 3rd-party / KuK / uboot-imx-kuk · GitLab

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Tim Jaacks requested to merge fix-tanaro-ram-instabilities into guf_imx_v2019.04_5.4.3_2.0.0 Apr 20, 2021

Change RAM-settings from NXP default to 40 Ohm DS and 60 Ohm ODT to fix instabilities esp. with SAMSUNG 304 and Nanya RAMs.

These settings were generated using the following tools from NXP:

MX8M_Mini_LPDDR4_RPA_v17.xlsx
mscale_ddr_tool_v3.20

These settings have been tested without issues on:

3x v1.0 with SAMSUNG 3S4 RAM
6x v1.1 with SAMSUNG 304 RAM
6x v1.1 with SAMSUNG 3S4 RAM
5x v1.1 with Micron RAM
5x v1.1 with ISSI RAM
5x v1.1 with Nanya RAM at temperatures of 0°C, 25°C and 50°C.

For Details see BCS ticket #21271