A/D Channel Enable Register
| CHEN0 | Analog Input Channel 0 Enable 1 = Enable 0 = Disable Channel 0 is the default enable channel if CHEN0~7 are set as 0s. |
| CHEN1 | Analog Input Channel 1 Enable 1 = Enable 0 = Disable |
| CHEN2 | Analog Input Channel 2 Enable 1 = Enable 0 = Disable |
| CHEN3 | Analog Input Channel 3 Enable 1 = Enable 0 = Disable |
| CHEN4 | Analog Input Channel 4 Enable 1 = Enable 0 = Disable |
| CHEN5 | Analog Input Channel 5 Enable 1 = Enable 0 = Disable |
| CHEN6 | Analog Input Channel 6 Enable 1 = Enable 0 = Disable |
| CHEN7 | Analog Input Channel 7 Enable 1 = Enable 0 = Disable |
| PRESEL | Analog Input Channel 7 select 00: External analog input 01: Internal bandgap voltage 10: Internal temperature sensor 11: Reserved |