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# designreview·Active

@Seve GBA

mention GBA

Started by AbseOct 13, 202616 messages

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Last active 5 days ago · plain text
Abseoriginal post
<@757706909351411845> GBA
Abse
https://tscircuit.com/abse/gameboy-advance#files
Abse
<@757706909351411845>
Abse
Shared an attachment
Abse
<@757706909351411845> https://tscircuit.com/abse/gameboy-advance#3d
Abse
<@757706909351411845>
Abse
<@778624824875941908> <@756504518417711104>
Abse
<@757706909351411845> https://jlcpcb.com/help/article/pcb-assembly-faqs-part-2
Abse
<@757706909351411845>
shibo
Reroute USB D+ and D− as a proper differential pair. From the published Circuit JSON, the connector-to-series-resistor routes are approximately 53.7 mm and 42.6 mm, use five and three vias respectively, change layers differently, and are not coupled. The RP2350 guide calls for approximately 90 Ω differential routing over an uninterrupted ground reference, with the 27 Ω resistors near the chip. The resistors are correctly present, but the long upstream routing does not follow that guidance. This needs a reroute or USB full-speed compliance/eye testing before sign-off. RP2350 hardware design guide
shibo
very large skew, it may cause issues

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