Hi * WTF is J22 (and R59)? Unless it has a good reason to be there, please > remove it and restore the previous VGA routing. >
yes, stupid added wrong there. Will remove and restore it. > * FPGA decoupling: place the 0402 1V2 capacitors closer to the center. > The larger 0805 capacitors can go further away from the center. For > example, C53 and C54 should be moved somewhere else and their current > position taken by 0402 capacitors. Move as many 0402 1V2 capacitors > as possible under the FPGA and close to the center. > Ok. Will place closer. > * OK not to change the few remaining shared power vias. At least there > is no via sharing anymore on 1V2 which is where the worst bugs could > occur. > Ok. > * New small addition: please indicate "Not 5V tolerant" near J21 (GPIO > expansion) > Will add it. > * I can't find the footprint "SO8-10-2.54" for the optoisolator in > MilkymistOne.PcbLib - please add it. Also, link the footprint in > MilkymistOne.SchLib like it's done for other parts. > Will link. > * What is the reference document you used for making the optoisolator > PCB footprint (so I can check it)? Is it the Fairchild datasheet that > you've linked in the BoM? In this case I need to update the > milkymist-datasheets repository that contains a datasheet for Vishay > parts with different footprints. > Yes, I'll send again. Right, thus the link in the Bom. Its package is SMDIP-B. > * You do not need to add that many 100uF capacitors on the DRAM. It's > mostly high frequency noise that we are filtering. Use only one extra > 100uF per chip instead of 4. > Ok, will only remain C248 & C240 100uF. So the all other 100nF capacitors we added just keep them there, Since those C162, C166, C159 and C160 you added another one 100nF capacitor each in parallel. http://www.milkymist.org/wiki/index.php?title=RC1_signal_integrity_measurements#Setup > > > c) Current soucring status is here. > > http://en.qi-hardware.com/wiki/Milkymist_One_RC2_BOM > > Have you updated the prices as well? > They are up-to-date except headers or very cheaper items, will be updated again. One thing,could you send me which vendor and vendor's part number you used for http://www.vishay.com/docs/82090/tsop48xx.pdf , I found even with the same P/N searched on google, it may get a same part number TSOP4838 but its supply voltage is 4.5~5.5V. Well, here vendor will provide me the exact 2.7~5.5V one and two free samples with part http://www.vishay.com/docs/81732/tsop348.pdf . I sourced Hexagonal Threaded Space and Plastic Fastener for M1 board, please check: http://en.qi-hardware.com/wiki/Milkymist_One_run_2_schedule#Packaging_Parts_Accessaries The threaded space<P/N: HTS-308> is 8mm height with 3mm, http://www.kss.com.tw/e4k/e4-11/C1111-1.asp If it's OK, I'll change the innner diameter of 4 through holes on board from 3 to 3.3mm for example. > Contents the box: > * MM1 board > * JTAG adapter > * 5V power supply > * leaflet (print the MAC addresses on it?) > * USB cable for the JTAG adapter (do we include one or assume people > already have it)? > * Fedora USB drive? > These items I think Wolfgang will provide you some comments. Thanks, Adam
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