i.MX6ULL EVK's Power ON/OFF

[tomohisa_sakamo]

Dear Support-Team,

We understand that the sequence of power supply is below.
  I.MX6ULL data sheet (IMX6ULLCEC 4.2)

-Specification
Power ON
· VDD_SNVS_IN -> VDD_HIGH_IN -> VDD_SOC_IN -> NVCC - xxx
Power OFF
· VDD_SOC_IN -> VDD_HIGH_IN -> VDD_SNVS_IN

By the way, it seems that the sequence of the evaluation board does not conform to the above specifications, is it good?

-i.MX6ULL-EVK
Power ON
• VDD_SOC_IN -> NVCC_xxx
The 3.3 V system of NVCC is simultaneously with VDD_HIGH_IN, and VDD_SOC_IN is turned on after that.

Power OFF
· VDD_SOC_IN -> VDD_HIGH_IN
It is dropping at the same time by discharge.

Best Regards,

[igorpadykov]

Hi Tomohisa

you are right, sequence of the evaluation board was validated by nxp

and also may be recommended for use.

Best regards
igor
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