P2 Pinout
Pin |
Function |
36 |
Red right TTL |
35 |
White right TTL |
34 |
Green right TTL |
33 |
White left TTL |
32 |
Yellow right TTL |
31 |
U26-2 (spare TTL out) |
30 |
Blue right TTL |
29 |
Trigger out TTL (U21 Port E.2) |
28 |
Red left TTL |
27 |
-nc- |
26 |
Green left TTL |
25 |
-nc- |
24 |
Yellow left TTL |
23 |
-nc- |
22 |
Blue left TTL |
21 |
P3-2 (usb) |
20 |
Q4 gate |
19 |
P3-3 (usb) |
18 |
+5V |
17 |
Pin 9 analog |
16 |
Cable sense input |
15 |
Pin 10 analog |
14 |
Pin 7 analog |
13 |
Pin 1 analog |
12 |
Pin 4 analog |
11 |
Pin 12 analog |
10 |
Pin 6 analog |
9 |
Serial RTS |
8 |
Pin 5 analog |
7 |
GND (Serial) |
6 |
GND |
5 |
Serial CTS |
4 |
USB opto- |
3 |
Serial Rx |
2 |
USB opto+ |
1 |
Serial Tx |
Note: The analog signals listed above are not active by default. They can be activated internally by adding 1206 SMT resistors in eight places (one for each signal). This is done this way to protect the internal circuitry from damage that could result if an external connection is made to this port which drives the pin as an input. (Only high impedance inputs should be connected to the analog pins.)