i.MX ProcessorsのトピックRe: iMX8M nano Processor Power Down

iMX8M nano Processor Power Down

nandish_sg — Fri, 17 Apr 2020 14:16:02 GMT

Hi All,

I want to know more about the iMX8M nano processor, in this processor it has 4x A53-cortex(core0 , core1, core2, core3) and 1x M7-cortex would be there, my queries are as below

1) How to do the Power Down and Power UP for both A53-cortex and M7-cortex ?

2) Is it possible to do Separate Power Down and Power UP for A53-cortex and M7-cortex , if yes then how to do ?

3) If question no.2 answer is not then,

case1: Is it A53-cortex controlling or monitoring the power management on M7-cortex or M7-cortex is controlled by A53-coretx ?

case1: In A53-cortex if i put One core is ON and remaining any one or two or three core in deep sleep mode then

M7-cortex also go to sleep mode or not ? or

case 2: If i put the entire A53-cortex in sleep mode then M7-cortex also go to sleep mode or not ?

Thanks in advance

Best Regards

Nandish S.G

Re: iMX8M nano Processor Power Down

gusarambula — Sat, 25 Apr 2020 20:17:44 GMT

Hello Nandish S.G,

My apologies for the delay.

You can see more details on the power up and power down sequence on the i.MX8M Nano datasheet (link below)

https://www.nxp.com/docs/en/data-sheet/IMX8MNCEC.pdf

This power up and down sequence powers both the CortexA-53 cores and the M7-Cortex cores. Initially the CortexA-53 would boot and then start the M7-Cortex.

It is not possible to separate the power up and power down of both core types and in a general sense is the CortexA-53 the one that sends signals to the M7-Cortex. As for power modes, you can find the different power modes in section 3.1.6 of the datasheet. You may put the CortexA-53 to sleep while the M7-Cortex is still running, for example.

I hope this information helps!

Regards,

Re: iMX8M nano Processor Power Down

nandish_sg — Wed, 20 May 2020 03:04:00 GMT

Hello Gusarambula,

Thanks for reply,

Best Regards.

SGN