i.MX7ULP: IO configuration

[mrudangshelat1]

Hi,

I am planning to use imx7ULP in one of the medical applications device. And require 3 Mic to interface with iMX7ULP. And it is battery operated device so we have to select iMX7ULP. I have some of the query below kindly provide suitable answers.

1. Are Flex IO can be configured for I2S or not?
2. What is the minimum m4 operating frequency?

Mrudang

[mrudangshelat1]

Hi Igor,

Can you provide me the steps to go below 48MHz for M4 core?

Mrudang

[igorpadykov]

Hi Mrudang

please refer to sect.26.1.4 Instantiation information for SCG0 (M4)

i.MX 7ULP Applications Processor Reference Manual

Best regards
igor

[mrudangshelat1]

Hi Igor,

Thanks for your support and quick response.

Mrudang

[mrudangshelat1]

Hi Igor,

Just confirm that by using the below application note. we can convert any FLEXIO of M4 and A7 to SAI, I2C etc...

https://www.nxp.com/docs/en/application-note/AN4955.pdf 

https://www.nxp.com/docs/en/application-note/AN12174.pdf 

Please confirm

Mrudang

[igorpadykov]

Hi Mrudang

yes these app notes can be used as starting point.

Best regards
igor

[igorpadykov]

Hi Mrudang

>Are Flex IO can be configured for I2S or not?

yes, one can refer to below app notes:

https://www.nxp.com/docs/en/application-note/AN4955.pdf 

https://www.nxp.com/docs/en/application-note/AN12174.pdf 

>What is the minimum m4 operating frequency?

no limit for minimum frequency.

Best regards
igor
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[mrudangshelat1]

Hi Igor,

I will take a look. 

I have seen the min freq is 48MHz in Very Low Power Run (VLPR) for M4. Can we go below that?

Mrudang

[igorpadykov]

Hi Mrudang

>I have seen the min freq is 48MHz in Very Low Power Run (VLPR) for M4. Can we go below that?

yes

Best regards
igor