54.8 Rev H - 12/2015
| DSU - Device Service Unit | Bit CTRL.CRC is write-only. |
| GCLK - Generic Clock Controller | Bit field description for GENCTRL.SRC updated. |
| DMAC – Direct Memory Access Controller |
|
| TCC – Timer/Counter for Control Applications | Editorial updates for CCBUFx registers. |
| Electrical Characteristics | Timing Characteristics for SERCOM added. |
| Schematic Checklist | Editorial updates for 'External Real Time Oscillator.' |