Datasheet

1009
Atmel | SMART SAM D21 [DATASHEET]
Atmel-42181C–SAM-D21_Datasheet–07/2014
Updated description in “Principle of Operation” on page 642.
Updated description in sub sections of “Basic Operation” on page 644.
Updated description in sub sections of “Additional Features” on page 656.
Updated description in “Synchronization” on page 671.
Lock Update (LUPD) bit description updated in Control B Clear (CTRLBCLR) register.
Compare Channel Buffer x Busy (CCBx) bit description updated in Synchronization Busy (SYNCBUSY) register.
Event Control (EVCTRL) register property updated: Removed Enable-Protected.
Interrupt Enable Clear (INTENCLR) Interrupt Enable Set (INTENSET) and Interrupt Flag Status and Clear
(INTFLAG) registers: Updated bit description of FAULT0, FAULT1, FAULTA and FAULTB.
STATUS register bit descriptions updated.
Wave Control (WAVE) register property updated: Removed Read-Synchronized.
Pattern Buffer (PATTB) register: Updated property and bit description.
Waveform Control Buffer (WAVEB) register: Updated property and bit descriptions.
“USB – Universal Serial Bus” on page 732
Removed figures: Setup Transaction Overview, OUT Single Bank Transaction Overview, IN Single Bank Transaction
Overview and USB Host Communication Flow.
Updated description and graphics in sub sections of “USB Device Operations” on page 737.
Updated description in sub sections of “Host Operations” on page 746.
Pad Calibration (PADCAL) register: Access updated.
Upgraded bit descriptions.
“Host Registers - Pipe RAM” on page 823: Updated register reset values.
“ADC – Analog-to-Digital Converter” on page 832
Register Description:
REFCTRL bit selection names updated from AREFA / AREFB to VREFA / VREFB in Table 32-7
“DAC – Digital-to-Analog Converter” on page 901
Updated block diagram and signal description: VREFP replaced with VREFB.
“Electrical Characteristics” on page 923