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I wanted to do some mixed-signal board, and decided that the RP2354A was the thing to use, since it doesn't need to bother with external flash etc. You'd probably still want external PSRAM, but that's not a hard requirement either. The Raspberry Pi is well documented and this largely uses the design from the "minimal board" reference docs. That includes the KiCad symbol itself for the RP2354A, which is in the example RPI schematic. The codec is the TAC5112. Not because I know what I'm doing, but because it looks like a reasonably simple-to-use single-supply audio codec that can use the same 3.3V supply that the RP2453 uses, keeping things fairly simple. Famous last words. And no, none of this is really wired up yet, so there's no real PCB layout yet. I've not verified that any of the GPIOs make sense etc, and all of that will presumably change when I do, and when I try to actually lay things out. I'll also need to actually do a proper job of picking footprints. This is mostly 0402 components with some larger caps randomly other sizes. Very rough kind of "maybe something like this will fit and work" Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
5 lines
136 B
Plaintext
5 lines
136 B
Plaintext
(sym_lib_table
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(version 7)
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(lib (name "Mylib")(type "KiCad")(uri "${KIPRJMOD}/../symbols/Mylib.kicad_sym")(options "")(descr ""))
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)
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