Like almost all high tech leaks, it has to be photographed with worst potato phone possible.
How I can really look what’s really improved to the PCB design looking at that? Please attach datasheet with the change log, like the industry does, so I can at least try to retrofit something into my older revision. So far I can see unpopulated IC place besides m2 as main difference only.
Yes, my photography skills are terrible. For more detailed information, please check the BPI website; all the information is available in the Resources section.
are you sure? On their Google-Drive are now V1.3 files. I have not looked in detail on the schematics, but the schematics have a V1.3 designation on the right corner and there is a nice CHANGELOG file with all changes: BPI-R4-Main-V13-Changelist.pdf (inside the same .rar file with the schematics)
The 1.3 schematic is out for multiple months I reckon, because I checked it before I made an order for this board (at the end of Februrary) and I clearly remember the planned footprint for the eSIM chips. When the board arrived, that was a little surprise for me, because my new board is not an 1.3 instead of a v1.1.
where have you this folder link? in wiki is still only the v11 pdf linked. the rar from your folder is v13 (filename and content). maybe you have the upper folder to get the 1.2 schematic?
R4V1.2 is an intermediate version, and no documentation will be provided for this version. Please focus on V1.3. Hardware documentation has been mentioned above and is available on the official website.
Hello, I’m not entirely sure what the specific power loss situation is or how it happened. However, from V1.1, it can be seen that the SFP’s power supply is also related to a certain GPIO, while V1.3 removed this control. They both draw power from 3.3VD.
As far as i see that means that sfp currently not working (like my 1g fibre one) on R4 finally should work? Imho this needs to be done for r4pro too…some sfp only pull down moddef0 when they got power…if R4(pro) gives power only when moddef0 is down they never come up.