Example testing RA8876 with some changes. My adapter board, I screwed up and had the IO pins rotated 180 degrees from what it was supposed to be. I routed it all very nicely, but when I tried doing things, nothing worked right on those pins... Then ringing them out I found what I had done... Probably should redo the board, but good enough for my RA8875 and RA8876 playing around.