=====  Inter-Integrated Circuit (I2C) group =====

This group defines all used Inter-Integrated Circuit (I2C) interfaces.

Each I2C interface is a sub group with the I2C name as the group name.

<code>
    "I2C": {
        "dac_i2c": {
            "pad_scl": "PA5",
            "pad_sda": "PA6",
            "peripheral" : "I2C0",
            "role": "master",
            "address_bits": "7",
            "clock_max_frequency": "100 kHz",
        }
    }
</code>


=== pad_scl ===

Serial Clock.

**type**: String

=== pad_sda ===

serial data signal.

**type**: String

==== peripheral ====

name of the I2C peripheral to use.

**type**: String

=== role ===
Describes the role in the communication. Possible values are:
  * master
  * slave

**type**: enum


=== address_bits ===

7bit Address or 10 bit Address

=== clock_max_frequency ===

fastest speed (shotest bit time) to use on the SCL line.

  * Standard Speed (up to 100 kHz)
  * fast mode (up to 400 kHz)
  * fast mode plus (up to 1000 kHz = 1 MHz)
  * high speed mode (up to 3.4 MHz)
  * ultra fast mode (up to 5 MHz)