minimum voltage of VDD_SNVS_IN

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minimum voltage of VDD_SNVS_IN

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yutaka_ando
NXP Employee
NXP Employee

According to the table 8 of i.MX6Solo/DualLite data sheet (MX6SDLCEC), the minimum of VDD_SNVS_IN is 2.9V

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On the other hand, table 11 of this document defines the power consumption of SNVS mode at VDD_SNVS_IN = 2.8V which is 0.1V lower than the minimum voltage defined in table 8.

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Does VDD_SNVS_IN support 2.8V?

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b36401
NXP TechSupport
NXP TechSupport

For correct operation table 8 is correct, the minimum setting is 2.9V.
This supply also generates the 1.1V on SNVS_CAP which is the logic supply for the 32KHZ OSC and other logic.
The 1.1V is generated from a resistor divider from SNVS_IN, so when it drops to 2.8V the 1.1V will drop below min voltage to operate this logic.

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yuji_fuseki
Contributor II

Hi Mrudang,

Ok, I understood.

Power consumption also is increased.

Br,

Yuji

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mrudangshelat1
Senior Contributor II

Hi Yuji,

2.8V is in error in the power consumption table. It should be 2.9V like in the operating conditions table.

Regards,

Mrudang

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yuji_fuseki
Contributor II

Hi, Mrudang

>I guess you want to say why it is described as 2.9V instead of 2.8V in the datasheet, right?

yes, you're right.

Corrected question:「why minimum operating voltage is NOT described as 2.8V in the datasheet?」

Br,

Yuji

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yuji_fuseki
Contributor II

Dear Mrudang

Sorry for jumping in.

>SNVS supply support 2.8V. 

if so, why minimum operating voltage is described as 2.8V in the datasheet?

Br,

Fuseki

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mrudangshelat1
Senior Contributor II

Hi Yuji,

I guess you want to say why it is described as 2.9V instead of 2.8V in the datasheet, right?

Mrudang

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mrudangshelat1
Senior Contributor II

Hi Yutaka,

Yes, SNVS supply support 2.8V. Please refer the Note#7.

#7: While setting VDD_SNVS_IN voltage with respect to Charging Currents and RTC, refer to Hardware Development Guide for i.MX 6Dual, 6Quad, 6Solo, 6DualLite Families of Applications Processors (IMX6DQ6SDLHDG).

Regards,

Mrudang

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