On Fri, Jan 17, 2020 at 1:51 PM Jorge Ramirez-Ortiz, Gmail jorge.ramirez.ortiz@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)