FlexSPI2 in 16-bit parallel mode @ 1.8V: does NVCC_EMC1 need to be 1.8V also?

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FlexSPI2 in 16-bit parallel mode @ 1.8V: does NVCC_EMC1 need to be 1.8V also?

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eamonnheffernan
Contributor III

Hi,

I'm using FlexSPI2 in parallel 16-bit mode @1.8V. The 16 data pins cover 3 power domains: SD_B1, EMC_B2 and unfortunately EMC_B1 for FLEXSPI_B_DATA7 on GPIO_EMC_B1_41. I guess this means that NVCC_EMC1 has to be 1.8V too. (Sigh!) I was hoping to use the GPIO_EMC_B1_XX in non-EMC modes at 3.3V. But it looks like that single FLEXSPI_B_DATA7 on EMC_B1 scuppers that plan and forces the entire set of EMC_B1 pins to be powered at 1.8V. Is there any way around this?

Thanks for your help.

Eamonn

eamonnheffernan_0-1632912951704.png

 

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Omar_Anguiano
NXP TechSupport
NXP TechSupport

Hello

Hope you are well.
Unfortunately, there is no workaround for this. All the pins linked to that power domain will be 1.8V.

I apologize for the inconvenience this may cause you.
Best regards,
Omar

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eamonnheffernan
Contributor III

Hi Omar,

Thank you very much for clarifying this. It is a pity that we have to dedicate all of bank 1 to 1.8V over just one pin, but hey, that's the way they wired it. Thanks again for your help.

Best regards - Eamonn

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Omar_Anguiano
NXP TechSupport
NXP TechSupport

Hello

Hope you are well.
Unfortunately, there is no workaround for this. All the pins linked to that power domain will be 1.8V.

I apologize for the inconvenience this may cause you.
Best regards,
Omar

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