Data Sheet

1065
Atmel | SMART SAM D21 [DATASHEET]
Atmel-42181G–SAM-D21_Datasheet–09/2015
Updated description in “Principle of Operation” on page 654.
Updated description in sub sections of “Basic Operation” on page 656.
Updated description in sub sections of “Additional Features” on page 668.
Updated description in “Synchronization” on page 683.
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 744
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 749.
Updated description in sub sections of “Host Operations” on page 758.
Pad Calibration (PADCAL) register: Access updated.
Upgraded bit descriptions.
“Host Registers - Pipe RAM” on page 835: Updated register reset values.
“ADC – Analog-to-Digital Converter” on page 844
Register Description:
REFCTRL bit selection names updated from AREFA / AREFB to VREFA / VREFB in Table 32-7
“DAC – Digital-to-Analog Converter” on page 913
Updated block diagram and signal description: VREFP replaced with VREFB.
“Electrical Characteristics” on page 935