header Board Mk. 0.1 3.3LP 1 2 GND 3 4 A0 5 6 A1 KBI inputs A2 7 8 A3 A4 9 10 A5 A6 (HPSW) 11 12 A7 (LPSW) B0 (1.25V) 13 14 B1 (BATSENSE) analog inputs B2 (3.3 SENSE) 15 16 B3 (BSENSE) B4 17 18 B5 B6 19 20 B7 F0 21 22 F1 GPIO F2 23 24 F3 F4 25 26 F5 F6 27 28 F7 C0 / TXD2 29 30 C1 / RXD2 comm to xbee or fon C2 / SDA 31 32 C3 / SCL I2C for temp sensors, etc. C4 / CLKOUT 33 34 C5 C6 35 36 C7 D0 37 38 D1 TPM port D2 39 40 D3 D4 41 42 D5 D6 43 44 D7 45 46 E0 / TXD1 47 48 E1 / RXD1 comm to decagon sensor or wireless router GND 49 50 GND