iMX6 Power configuration without PMIC.

[chilwonna]

Hi everyone,

The board that I design has not the PMIC for iMX6.
So, I will configure as follows.

12V@3A     ---> 5V@3A(DCDC)     ---> 3.0V@300mA(LDO) - VSNVS_IN & VDDHIGH_IN (1)
                    |                                    ---> 1.375V@2.5A(DCDC)- ARM_IN   (2)
                    |                                    ---> 1.375V@2.5A(DCDC)- VDDSOC_IN  (2)
                    |
                    |         
                    |---> 5V@3A(DCDC)   ---> 1.5V@1.5A(DCDC)- DDR3 (3)
                                                        ---> 3.3V@1.5A(DCDC)- IOs  (4)
                    "(x)" is a power sequence.

Powers will be controlled as follows
(1)powergood => (2)enable =>  (2)powergood(or voltage supervisor ic) => POR & (3)enable =>  (3)powergood => (4)enable.

Is this power configuration OK?

Thanks.

[igorpadykov · Accepted solution]

Hi chilwonna

I think power up sequence is good. POR should be asserted from

beginning and deasserted when all power supplies and 24MHz/32.768KHz

clocks become stable.

Best regards

igor

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[wangvictor]

chilwonna‌

Hi, 

Recently I was working on i.MX6 DL sabreSD board without PMIC.

For software issue, What configuration did you modified?

Did I need to modify some driver myself or I just need to set all the configuration which related with Power Management to disabled?

Thanks in advanced!