Demo pinout

this example simply does use random pins without regarding pin types at all

+----+-----+--------+--------+-----+----+
|    | Pin |  Name  |  Name  | Pin |    |
+----+-----+--------+--------+-----+----+
|    |  1  | 3.3v   | 5v     |  2  |    |
| x1 |  3  | SDA    | 5v     |  4  |    |
| x2 |  5  | SCL    | GND    |  6  |    |
| x3 |  7  | G4     | TXO    |  8  |    |
|    |  9  | GND    | RXI    | 10  |    |
| x4 | 11  | G17    | G18    | 12  |    |
| y1 | 13  | G27    | GND    | 14  |    |
| y2 | 15  | G22    | G23    | 16  |    |
|    | 17  | 3.3v   | G24    | 18  |    |
| y3 | 19  | MOSI   | GND    | 20  |    |
| y4 | 21  | MISO   | G25    | 22  |    |
|    | 23  | CLK    | CD0    | 24  |    |
|    | 25  | GND    | CE1    | 26  |    |
|    | 27  | IDSD   | IDSC   | 28  |    |
| i1 | 29  | G05    | GND    | 30  |    |
| i2 | 31  | G6     | G12    | 32  |    |
| i3 | 33  | G13    | GND    | 34  |    |
| i4 | 35  | G19    | G16    | 36  |    |
|    | 37  | G26    | G20    | 38  | s2 |
|    | 39  | GND    | G21    | 40  | s1 |
+----+-----+--------+--------+-----+----+