topic Re: Upload Linux into SOM without Base Board and Test DDR memory! in i.MX Processors

Upload Linux into SOM without Base Board and Test DDR memory!

calibronic — Wed, 15 Jul 2020 12:54:12 GMT

I am going to design a SOM based on i.MX8M mini SOM reference design(attached picture) ,so I have 3 questions:

1.Would it be possible to upload Linux into SOM module without a Base board?

2.What are the pins of module that allow me to upload Linux without a Base board?

3.would it be possible to test DDR memory without a Base Board? if so, How would it be possible?

Re: Upload Linux into SOM without Base Board and Test DDR memory!

gusarambula — Wed, 15 Jul 2020 18:02:13 GMT

Hello Saeid Fallah,

It’s possible, but you would still need to connect the SOM or CPU board so that you can provide power and the requires connections to load the NAND memory, for example. More importantly, you would still need a base board to provide the boot switch, power and other connections, as the CPU board is not designed for standalone boot.

Please refer to the CPU boards schematics available online for more details on what signals are provided by the base board. These are available under design resources on the following link:

https://www.nxp.com/design/development-boards/i-mx-evaluation-and-development-boards/evaluation-kit-for-the-i-mx-8m-mini-applications-processor:8MMINILPD4-EVK

My apologies for the inconvenience.

Regards,

Re: Upload Linux into SOM without Base Board and Test DDR memory!

calibronic — Thu, 16 Jul 2020 01:12:01 GMT

Thank you so much for your replay.

I am going to place boot dip switch to SOM and also I am going to consider a place to apply power supply to SOM,

1. How can I upload Linux in this case? Do I have to connect external USB cable to CPU USB port and use a specific software?

2. Can I do DDR4 calibration test in this condition ?

Re: Upload Linux into SOM without Base Board and Test DDR memory!

gusarambula — Sat, 18 Jul 2020 02:11:33 GMT

Hello Saeid Fallah,

My recommendation would be mimicking the Base board as in regards of the power supply, debugging and download USB port so that you can use the UUU to download the image to your SOM and use the DDR Stress Tool. I haven’t seen it implemented but it should be doable.

I hope this helps!

Regards,