This field defines the ADC clock relative to the
               peripheral clock.
            This field is not synchronized. For the client ADC, these bits have no effect when
               the SLAVEEN bit is set (CTRLA.SLAVEEN= 1).
         
         | Value | Name | Description | 
|---|
               | 0x0 | 
               DIV2 | 
               Peripheral clock divided by 2 | 
            
               | 0x1 | 
               DIV4 | 
               Peripheral clock divided by 4 | 
            
               | 0x2 | 
               DIV8 | 
               Peripheral clock divided by 8 | 
            
               | 0x3 | 
               DIV16 | 
               Peripheral clock divided by 16 | 
            
               | 0x4 | 
               DIV32 | 
               Peripheral clock divided by 32 | 
            
               | 0x5 | 
               DIV64 | 
               Peripheral clock divided by 64 | 
            
               | 0x6 | 
               DIV128 | 
               Peripheral clock divided by 128 | 
            
               | 0x7 | 
               DIV256 | 
               Peripheral clock divided by 256 |