search

kiibohd / pcb

PCB and PCB related bits
Other
395 stars 80 forks source link

Connection from VDDA and VSSA to VDD and VSS? #2

Closed Duckle29 closed 8 years ago

Duckle29 commented 8 years ago

Hey there. I'm working with a smaller chip, though quite identical to the one you are using on the IC60, and poking around the reference manual, it's stated that VSSA and VDDA should be connected to VDD and VSS if the analog supply pins are externaly available, with apropriate filtering, however it seems they are left unconnected on the IC60. Any reasons behind this?

haata commented 8 years ago

Basically, we don't use any analog features on our current set of keyboards so we can just leave them as disconnected, this way we don't need any filtering caps.

On future keyboards if we do something like a capsense controller we'll need to add proper reference voltages.

Duckle29 commented 8 years ago

Gotcha. Thanks for the answer :) These reference manuals are quite large, and your schematic helps a bunch to know where to look :)