i.MX ProcessorsのトピックVDD_SNVS_IN voltage range

VDD_SNVS_IN voltage range

jhones — Thu, 26 Apr 2018 07:03:39 GMT

Hi,

I have seen a contradiction in the i.MX 6DualPlus/6QuadPlus datasheet regarding VDD_SNVS_IN voltage range:

Table 6. Operating Ranges: 2.8V - 3.6V

Table 4. Absolute Maximum Ratings: -0.3V - 3.4V

Can you confirm that 3.6V is the absolute maximum of VDD_SNVS_IN for the i.MX 6DualPlus/6QuadPlus?

It this is correct, does this range (-0.3 - 3.6V) apply for all iMX6 family i.MX6Quad/Dual/DualLight/Solo?

I would like to short VDD_HIGH_IN VDD_SNVS_IN and connect both to a 3.3V supply.
Supply has a %5 tolerance which may end up at 3.465V. VDD_HIGH_IN can withstand this question is can VDD_SNVS_IN operate at 3.465V?
(Adding a schottky diode between VDD_HIGH_IN to VDD_SNVS_IN for lowering the voltage of VDD_SNVS_IN does not seem to be a solution since drop is negligible in the VSNVS max current of 275uA)

Thank you for your support

Re: VDD_SNVS_IN voltage range

Rita_Wang — Thu, 03 May 2018 07:52:59 GMT

Hi Aviad,
The 3.6v is the maximum of VDD_SNVS_IN for the i.MX6DualPlus/6QuadPlus. But in generally use the VDD_SNVS_IN is given 3.0 V power. The i.MX6Quad/Dual/DualLight/Solo are different from i.MX6DualPlus/6QuadPlus, the voltage rangs you can see details in the datasheet.
You action is not right "I would like to short VDD_HIGH_IN VDD_SNVS_IN and connect both to a 3.3V supply"
For that you can not power up VDD_HIGH_IN and VDD_SNVS_IN. T at the same time. The VDD_SNVS_IN need firstly given 3.0v power. The VDD_HIGH_IN can be power up later but not too late.
And here the 3.465V is not allowed, you can try to adjust it under 3.3V.
Hope the above reply can do help for you.
Have a great day,
Rita

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Re: VDD_SNVS_IN voltage range

jhones — Thu, 03 May 2018 09:17:28 GMT

Hi,

Your reply confirms iMX6DualPlus/6QuadPlus range for both VDD_SNVS_IN and VDD_HIGH_IN is: 2.8V - 3.6V

As listed in datasheet.

1. Can you therefore clarify why I cannot connect both to a 3.3V supply with tolerance of +5% (Maximum of 3.465V)

2. Your requirements of VDD_SNVS_IN being supplied prior to VDD_HIGH_IN contradicts datasheet recommendation below. Please clarify.

Thanks