20pin connector chart
From Gumstix User Wiki
20 Pin Connector Solder Pads on console-st expansion board.
| Signal | GPIO | Pin | Signal | GPIO | Pin |
|---|---|---|---|---|---|
| X_SDA | 1 | X_BIT_CLK | GPIO(28) | 2 | |
| X_SCL | 3 | SDATA_IN0 | GPIO(29) | 4 | |
| IR_TXD | GPIO(47) | 5 | SDATA_IN1 | GPIO(32) | 6 |
| IR_RXD | GPIO(46) | 7 | SDATA_OUT | GPIO(30) | 8 |
| X_MOSI | GPIO(83) | 9 | NARESET | 10 | |
| X_MISO | GPIO(84) | 11 | SYNC | GPIO(31) | 12 |
| NSSPFRAME | GPIO(82) | 13 | NRESET | 14 | |
| NSSPCLK | GPIO(81) | 15 | GND | 16 | |
| L_DD(1) | GPIO(59) | 17 | L_DD(3) | GPIO(61) | 18 |
| L_DD(2) | GPIO(60) | 19 | L_DD(4) | GPIO(62) | 20 |
This photo shows where the various pads are on the back of the console-st board:
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