Data Sheet

1058
Atmel | SMART SAM D21 [DATASHEET]
Atmel-42181G–SAM-D21_Datasheet–09/2015
SRAM Static random-access memory
SYSCTRL System controller
SWD Single-wire debug
TC Timer/Counter
TX Transmitter
ULP Ultra Low Power
USART Universal synchronous and asynchronous serial receiver and transmitter
V
DD
Digital supply voltage
VREF Voltage reference
WDT Watchdog timer
XOSC Crystal oscillator
XTAL Crystal
Table 40-5. Acronyms and Abbreviations (Continued)
Abbreviation Description