P2 Pinout
Pin |
Function |
32 |
Yellow right TTL |
24 |
Yellow left TTL |
35 |
White right TTL |
33 |
White left TTL |
4 |
USB opto- |
2 |
USB opto+ |
31 |
U26-2 (spare TTL out) |
29 |
Trigger out TTL (U21 Port E.2) |
1 |
Serial Tx |
3 |
Serial Rx |
9 |
Serial RTS |
5 |
Serial CTS |
36 |
Red right TTL |
28 |
Red left TTL |
20 |
Q4 gate |
17 |
Pin 9 analog |
14 |
Pin 7 analog |
10 |
Pin 6 analog |
8 |
Pin 5 analog |
12 |
Pin 4 analog |
11 |
Pin 12 analog |
15 |
Pin 10 analog |
13 |
Pin 1 analog |
19 |
P3-3 (usb) |
21 |
P3-2 (usb) |
34 |
Green right TTL |
26 |
Green left TTL |
7 |
GND (Serial) |
6 |
GND |
16 |
Cable sense input |
30 |
Blue right TTL |
22 |
Blue left TTL |
23 |
-nc- |
25 |
-nc- |
27 |
-nc- |
18 |
+5V |
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.)