topic Re: IMX8MQ 8G LPDDR4 change in i.MX Processors

IMX8MQ 8G LPDDR4 change

coindu — Wed, 14 Jul 2021 03:19:20 GMT

Hi community:

I have a qustion about use 8G LPDDR4 instead of 3G lpddr4 on IM8MQ.

Firstly download the laster ddr tools with mscale_ddr_tool _v3.20 and MX8M_LPDDR4_RPA_v29.xlsx.

Then open the DDR datasheet， I can see the below infomation

coindu_0-1626232571266.png

row aaddress is [16:0]

so I modify the RPA file

coindu_1-1626232622555.png

copy DDR strees test file to xxxx.ds and run the mscale DDR tool. the result is raw 16, something wrong? Does the tool can support to 8G?

coindu_2-1626232728002.png

and how the modify the uboot code about it.

Re: IMX8MQ 8G LPDDR4 change

igorpadykov — Wed, 14 Jul 2021 04:54:24 GMT

Hi Coin

unfortunately lpddr4 devices with 17-row addresses are not supported by i.MX8MQ.

Best regards
igor

Re: IMX8MQ 8G LPDDR4 change

coindu — Wed, 14 Jul 2021 05:41:07 GMT

Does it means that 8G DDR cannot be support?According to the chip manual, it supports 8GLPDDR configuration.Do you have any successful experience with 8G LPDDR?