We are starting to develop our IMX6UL (9x9mm) shape board, based at PF3000 PMIC.
On your site I can find only design SPF-2816/SPF-2817 based at shape 14x14mm
and with discrete power supplies, which is not some special help for me.
Reading some mails, I have seen that there is design SPF-28865, based at PM3000 just tailored for IMX6UL
but I can't find it.
I have two questions:
1) How to get ref design (SCH and BOM) for SPF-28865 ?
2) I analyzed SPF-2816/SPF-2817 design about RMII (Ethernet) and I saw one unusually interface for RMII.
Practically , in this design there is no typical RMII interface signal ENET_REF_CLK (25 or 50 mhz) which
mainly is coming from external PHY or some clock generator. In this design I have ENET_TX_CLK coming from
IMX6UL towards PHY. I never seen before some type of connection. It seems as one AUX signal out of RMII standard.
I can understand that this signal can be used for external PHY as CLK source, but it is not clear how MAC inside IMX6UL get REF_CLK (25/50 Mhz).
For example, I developed board based at IMX6DL and in this case I had dedicated pin for external REF_CLK but here I can't see it.
Maybe is some way IMX6UL locally generates from main 24mhz via some PLL ??
Could you be so kind to answer to my questions