i.MX ProcessorsのトピックExtend i.MX 8M Mini/Plus Operating Ranges

Extend i.MX 8M Mini/Plus Operating Ranges

marcelziswiler — Wed, 10 Feb 2021 22:06:20 GMT

In our testing, we noticed that the i.MX 8M Mini and Plus do still produce quite some excess heat if being stressed and reaching higher temperatures (e.g. above around 50 deg C ambient they will just end up overheating). Looking at their datasheets (excerpt from the Mini attached) we noticed that in both cases the lowest Operating Point for them A53 cores is 1.2 GHz at 0.85 volts.

How about running it at lower frequencies?

Could the voltage be further reduced?

If so, to what degree resp. how related to the frequency?

Is there any expected side effect on endurance, reliability or stability to be expected?

Could we basically just modify the opp_table or what else would we need to look out for?

https://source.codeaurora.org/external/imx/linux-imx/tree/arch/arm64/boot/dts/freescale/imx8mm.dtsi?h=imx_5.4.70_2.3.0#n126

Re: Extend i.MX 8M Mini/Plus Operating Ranges

igorpadykov — Thu, 11 Feb 2021 00:33:53 GMT

Hi marcelziswiler

>How about running it at lower frequencies?

yes it is allowed.

>Could the voltage be further reduced?

not sorry, as it was not tested on factory.

>Is there any expected side effect on endurance, reliability or stability to be expected?

no side effects.

>Could we basically just modify the opp_table or what else would we need to look out for?

yes

Best regards
igor

Re: Extend i.MX 8M Mini/Plus Operating Ranges

marcelziswiler — Thu, 18 Feb 2021 21:40:39 GMT

Would have been really nice if NXP did its due diligence and integrated more actual useful operation points. Thanks!