| Field | Offset | Width | atsam3x8e |
|---|---|---|---|
| ONEBIT | 31 | 1 | ✔ |
| MODSYNC | 30 | 1 | ✔ |
| MAN | 29 | 1 | ✔ |
| FILTER | 28 | 1 | ✔ |
| MAX_ITERATION | 24 | 3 | ✔ |
| INVDATA | 23 | 1 | ✔ |
| VAR_SYNC | 22 | 1 | ✔ |
| DSNACK | 21 | 1 | ✔ |
| INACK | 20 | 1 | ✔ |
| OVER | 19 | 1 | ✔ |
| CLKO | 18 | 1 | ✔ |
| MODE9 | 17 | 1 | ✔ |
| MSBF | 16 | 1 | ✔ |
| CHMODE | 14 | 2 | ✔ |
| NBSTOP | 12 | 2 | ✔ |
| PAR | 9 | 3 | ✔ |
| SYNC | 8 | 1 | ✔ |
| CHRL | 6 | 2 | ✔ |
| USCLKS | 4 | 2 | ✔ |
| USART_MODE | 0 | 4 | ✔ |