The current 28 pinmap:
1 - RESET
2 - DIGITAL | ANALOG
3 - SPI OUT | DIGITAL | ANALOG
4 - PWM 1A | DIGITAL | ANALOG
5 - PWM 1B | DIGITAL | ANALOG
6 - PWM 1C | DIGITAL | ANALOG
7 - DIGITAL | ANALOG
8 - GROUND
9 - 8MHz crystal wasted: COM2:TRANSMIT | DIGITAL
10 - 8MHz crystal wasted: COM2: RECEIVE | DIGITAL
11 - CONSOLE Tx (DATA OUT) | COM4 Tx | DIGITAL
12 - CONSOLE Rx (DATA IN) | COM4 Rx | DIGITAL
13 - POWER (+2.3 to +3.6V)
14 - SPI IN | 5V | DIGITAL
15 - VBUS wasted: DIGITAL | 5V | COUNT
16 - DIGITAL | 5V | COUNT | WAKEUP | IR
17 - DIGITAL | 5V | COUNT | I2C CLOCK
18 - DIGITAL | 5V | COUNT | I2C DATA
19 - GROUND
20 - 47uF TANT CAPACITOR (+)
21 - USB D+ wasted: DIGITAL | 5V | COM1: TRANSMIT
22 - USB D- wasted: DIGITAL | 5V | COM1: RECEIVE
23 - VUSB3V3 wasted: ANALOG | DIGITAL
24 - ANALOG | DIGITAL | PWM 2B
25 - ANALOG | DIGITAL | SPI CLOCK
26 - ANALOG | DIGITAL | PWM 2A
27 - ANALOG GROUND
28 - ANALOG POWER (+2.3 to +3.6V)