question: mx7ulp - LDO_ENABLED_MODE

Fabio Estevam festevam at gmail.com
Fri Jan 17 18:18:55 CET 2020


On Fri, Jan 17, 2020 at 1:51 PM Jorge Ramirez-Ortiz, Gmail
<jorge.ramirez.ortiz at gmail.com> wrote:

> btw was checking the TRM manual (Chapter 28, PMC - page 1172)
>
> [..]
> PMC1 power mode[LDOVL] fields don’t necessarily satisfy the operation voltage levels
> required by the system. Such operation voltage requirements can be found on i.MX 7ULP
> Data Sheet. In this sense, no power transition should be performed before ensuring the
> mentioned register fields are matching the required operation voltage levels expressed on
> the data sheet.
>
> =>  0.95V in the ldt_init function, is it in the data sheet?
> I just cant find that particular document

Yes, please take a look at https://www.nxp.com/docs/en/data-sheet/IMX7ULPCEC.pdf

(Table 5 - Search for PMC1_STOP[LDOVL] where it shows 0.95V as the
typical value)


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