Datasheet

1007

Atmel | SMART SAM D21 [DATASHEET]

Atmel-42181C–SAM-D21_Datasheet–07/2014

“GCLK – Generic Clock Controller” on page 84

Signal names updated in Device Clocking Diagram, Figure 14-1.

“PM – Power Manager” on page 106

Added figure Figure 15-2.

Removed CFD bit from INTENCLR, INTENSET and INTFLAG.

Added PTC bit to APBCMASK register.

AHB Mask register (AHBMASK): Full bit names updated.

APBC Mask register (APBCMASK.PTC): Added PTC to bit 19.

CFD bit removed from INTENCLR, INTENSET and INTFLAG.

“SYSCTRL – System Controller” on page 138

Updated description of “8MHz Internal Oscillator (OSC8M) Operation” on page 144.

FDPLL96M section reorganized and more integrated in the SYSCTRL chapter: Features, Signal Description and

Product Dependencies sub sections removed and integrated with the corresponding sections in SYSCTRL.

Updated reset values in OSC8M.

Updated CALIB[11:0] bit description in OSC8M.

Updated LBYPASS bit description in DPLLCTRLB.

“WDT – Watchdog Timer” on page 200

Updated description in “Principle of Operation” on page 202: Introducing the bits used in Table 17-1 WDT Operating

Modes.

Updated description in “Initialization” on page 202.

Updated description in “Normal Mode” on page 203.

Updated description in “Window Mode” on page 204.

Updated description in “Interrupts” on page 205.

WEN bit description in the Control register (CTRL.WEN) updated with information on enable-protection.

“RTC – Real-Time Counter” on page 218

“Periodic Events” on page 223: Bit names updated fro, PERx to PEREOx in example, Figure 18-4.

CLOCK.HOUR[4:0]: Updated Table 18-10

Mode 0 and Mode 2: CMPx bit renamed to CMP0 since only one CMP0 is available.

Bit description of CLOCK.HOUR[4:0]: Updated Table 18-10 Hour.

ALARMn register renamed to ALARM0.

“DMAC – Direct Memory Access Controller” on page 261

Updated block diagram, Figure 19-1.

General updated description.

“EIC – External Interrupt Controller” on page 325