Power on
========
+----------------------+--------------------------------+-----------------------------+------------------+
|**Component**         |**Operation**                   |**I2C command**              |**Comment**       |
+----------------------+--------------------------------+-----------------------------+------------------+
|Multiplexer           |Set channel to 1                | ``writeI2C(112,1);``        |                  |
+----------------------+--------------------------------+-----------------------------+------------------+
|Rheostats             |Put C1 on control register at 1 |  | ``writeI2C(44,28,02);``  |                  |
|                      |                                |  | ``writeI2C(47,28,02);``  |                  |
|                      |                                |  | ``writeI2C(46,28,02);``  |                  |
+----------------------+--------------------------------+-----------------------------+------------------+
|Rheostats             |Set 3.3 V                       |  | ``writeI2C(44,07,168);`` |                  |
|                      |                                |  | ``writeI2C(47,07,168);`` |                  |
|                      |                                |  | ``writeI2C(46,07,168);`` |                  |
+----------------------+--------------------------------+-----------------------------+------------------+
|Register              |Put all Output IO at 0          | ``writeI2C(32,1,0);``       |                  |
+----------------------+--------------------------------+-----------------------------+------------------+
|Register              |Configure IO to input or output | ``writeI2C(32,3,194);``     |                  |
+----------------------+--------------------------------+-----------------------------+------------------+
|Register              |Power on                        | ``writeI2C(32,1,1);``       |                  |
+----------------------+--------------------------------+-----------------------------+------------------+
|Register              |Check power on                  |  | ``readI2C(32,0,1);``     | Must return 129  |
+----------------------+--------------------------------+-----------------------------+------------------+


.. caution:: For safety reason, power can be enable only if others powers are established.  
             If one power is not at a good state, buffers will be disable to protect electronics and FPGA.


At power down, DAC need to be powered down with I2C command

.. figure:: power.png
    :figwidth: 90%
    :align: center