Analog ports
============

An arduino is used in addition to the main CPU board to handle the analog acquisition.

Pin function:

+----------+----------------+-----------+----------+----------------+-----------+
| Pin      | Analog channel | Function  | Pin      | Analog channel | Function  | 
+==========+================+===========+==========+================+===========+
| **1**    | 1              | PH 1.1    | **3**    | 2              | PH 2.1    |
+----------+----------------+-----------+----------+----------------+-----------+
| **5**    | 3              | PH 1.2    | **7**    | 4              | PH 2.2    |
+----------+----------------+-----------+----------+----------------+-----------+
| **11**   | 5              | SiPM 1    | **13**   | 6              | SiPM 64.1 |
+----------+----------------+-----------+----------+----------------+-----------+
| **15**   | 7              | SiPM 64.2 | **17**   | 8              | SiPM 64.3 |
+----------+----------------+-----------+----------+----------------+-----------+
| **9**    |                | AINSENSE  | **10**   |                | AGND      |
+----------+----------------+-----------+----------+----------------+-----------+

The software reads the output via a serial interface. Packets are identified and used to read out the photodiodes, SiPM and thermistors.