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