Hello Champs,
In order to cope with higher current requirement for VDDHIGH_IN and VDD_SNVS_IN,
my customer is trying to use the i.MX6Q SabreSD schematics' option.
"Optional LDO" for VDD_SNVS_IN, and FP0100F0 SW4(3.15V) for VDDHIGH_IN.
Now we are wondering what this D10 NSR0320 is for.
#1
In the original design VDDHIGH_IN(VGEN5) is 2.8V and VDD_SNVS_IN is 3.0V.
Now they are trying to use 3.15V for VDDHIGH_IN, which is bigger than VDD_SNVS_IN 3.0V.
What should the D10 be handled in this new design?
#2
In the Reference Manual, there is no power up sequence for VDDHIGH_IN.
Is the startup order 6 of SW4 OK for VDDHIGH_IN?
Because the original VDDHIGH_IN order VGEN5_SEQ is 12.
Best regards,
Nori Shinozaki
Solved! Go to Solution.
Hi Nori
separate seems better as allows to provide better filtered
power for both VDD_SNVS_IN and VDDHIGH_IN.
Best regards
igor
Hi Nori
1. D10 is not needed, its purpose (useful on older processor versions )
described on p.2 sabre schematic spf-27392
2. yes startup order 6 of SW4 is OK for VDDHIGH_IN.
Best regards
igor
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Hello Igor,
Thank you!
Then can we supply VDDHIGH_IN and VDD_SNVS_IN from the same source(SW4-3.15V) at the same time(at the very beginning)?
Best regards,
Nori Shinozaki
Hi Nori
right, datasheet provides such possibility
Best regards
igor
Thanks Igor,
So in conclusion, is this design Ok to provide enough current both VDD_SNVS_IN and VDDHIGH_IN?
From PF0100 datasheet, SW4 can provide 1000mA.
Best regards,
Nori Shinozaki
Hi Nori
I think it is good for providing enough current for both VDD_SNVS_IN and VDDHIGH_IN.
Best regards
igor
Igor,
Do you suggest to provide current with VDDHIGH_IN and VDD_SNVS_IN separately as follow?
For VDDHIGH_IN:
For VDD_SNVS_IN:
Which is better do you think?
Best regards,
Nori Shinozaki
Hi Nori
separate seems better as allows to provide better filtered
power for both VDD_SNVS_IN and VDDHIGH_IN.
Best regards
igor
Hello Igor,
Thanks for your advise!
Best regards,
Nori Shinozaki