topic Re: How to set the desired DDR frequency using the i.MX8QXP/DXP/DX DDR Register Programming Aid in i.MX Processors

How to set the desired DDR frequency using the i.MX8QXP/DXP/DX DDR Register Programming Aid

changshui — Fri, 01 Mar 2024 07:47:38 GMT

Hi expert

I have a question about DDR frequency setting. my hardware platform:

SOC: imx8dx

DDR: MT53D512M16D1DS

（DDR model is consistent with the DDR Register Programming Aid）

When I used i.MX8QXP/DXP/DX DDR Register Programming Aid to set the DDR frequency, I found that clock cycle freq only 800M and 1200M could be selected in excel.

DDR_Freq.png

If I want to set the DDR frequency to 1100M, force off cell input validation and set the clock to 1100, is that OK？If not, how to set it

Re: How to set the desired DDR frequency using the i.MX8QXP/DXP/DX DDR Register Programming Aid

pengyong_zhang — Fri, 01 Mar 2024 09:40:34 GMT

Hi, @changshui

You can input the DDR frequency point.

B.R

Re: How to set the desired DDR frequency using the i.MX8QXP/DXP/DX DDR Register Programming Aid

changshui — Mon, 04 Mar 2024 00:32:30 GMT

Hi pengyong

I still have a question. As you described, if I can enter any frequency point, why can excel only select 800M and 1200M frequencies now

B.R

Re: How to set the desired DDR frequency using the i.MX8QXP/DXP/DX DDR Register Programming Aid

pengyong_zhang — Mon, 04 Mar 2024 02:01:47 GMT

Hi @changshui

Because in our default BSP code, the board's DDR default start frequency is the same as the default in the RPA table, we cannot set all the frequency points in our RPA table. There are so many frequency point.

B.R

Re: How to set the desired DDR frequency using the i.MX8QXP/DXP/DX DDR Register Programming Aid

changshui — Mon, 04 Mar 2024 12:03:18 GMT

OK, I konw! Thanks for your help