
change the API

- ADDRselect() instead of write()?

optional

  inline uint8_t ADDRread() { return digitalRead(_addr); };
  inline uint8_t REFSELread() { return digitalRead(_refsel); };
  
  - **uint8_t ADDRread()** read back pin.
  - **uint8_t REFSELread()** read back pin.
  
  
  
  