LPDDR4 tuning on DDR tool

kevincheng — Fri, 15 Mar 2019 02:31:45 GMT

Hi,

We use DDR tool 2.1 to tuning our new LPDDR4 memory on iMX8MQ. That pass the Calibration, and do the stress test, the result is fail. When we check "Disable DDR Memory Cache", and retest again, it pass. Then we direct use "Gen Code" and compiler with uboot, the result is my system sometime boot success and sometime boot fail on memory panic. Have any thing we can change on DDR tool or ds file?

Regards,

Kevin

Re: LPDDR4 tuning on DDR tool

Yuri — Fri, 15 Mar 2019 06:35:49 GMT

Hello,

Disable DDR Memory Cache option, when selected, means, that DDR memory

is mapped as none-cacheable/none-buffable memory when you run stress test.

When using the cache the memory is heavy loaded; such configuration corresponds

OS working. Therefore it makes sense to check the memory more carefully, using

the Hardware Developer’s Guide.

https://www.nxp.com/docs/en/user-guide/IMX8MDQLQHDG.pdf

In particular, use section 3.(i.MX 8MDQLQ layout/routing recommendations)

Have a great day,
Yuri

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topic LPDDR4 tuning on DDR tool in i.MX Processors

LPDDR4 tuning on DDR tool

Re: LPDDR4 tuning on DDR tool