Acronyms and Abbreviations

The below table contains acronyms and abbreviations used in this document.

Table 1. Acronyms and Abbreviations
Abbreviation Description
AC Analog Comparator
ACK Acknowledge
ADC Analog-to-Digital Converter
ADDR Address
AES Advanced Encryption Standard
ALU Arithmetic Logic Unit
AREF Analog reference voltage, also VREFA
BLB Boot Lock Bit
BOD Brown-out detector
CAL Calibration
CCMP Compare/Capture
CCL Configurable Custom Logic
CCP Configuration Change Protection
CLK Clock
CLKCTRL Clock Controller
CRC Cyclic Redundancy Check
CTRL Control
DAC Digital-to-Analog Converter
DFLL Digital Frequency Locked Loop
EEPROM Electrically Erasable Programmable Read-Only Memory
EVSYS Event System
GND Ground
GPIO General Purpose Input/Output
I2C Inter-Integrated Circuit
IF Interrupt flag
INT Interrupt
IrDA Infrared Data Association
IVEC Interrupt Vector
LUT Look-Up Table
MBIST Memory built-in self-test
NACK Not Acknowlege
NMI Non-maskable interrupt
NVM Non-Volatile Memory
NVMCTRL Non-Volatile Memory Controller
OSC Oscillator
PC Program Counter
PER Period
POR Power-on reset
PORT I/O Pin Configuration
PTC Peripheral Touch Controller
PWM Pulse Width Modulation
RAM Random-Access Memory
REF Reference
REQ Request
RISC Reduced Instruction Set Computer
RSTCTRL Reset Controller
RTC Real-Time Counter
RX Receiver/Receive
SERCOM Serial Communication Interface
SLPCTRL Sleep Controller
SMBus System Management Bus
SP Stack Pointer
SPI Serial Peripheral Interface
SRAM Static Random-Access Memory
SYSCFG System Configuration
TC Timer/Counter (Optionally superseded by a letter indicating type of TC)
TRNG True Random Number Generator
TWI Two Wire Interface
TX Transmitter/Transmit
ULP Ultra-low power
UPDI Unified Program and Debug Interface
USART Universal Synchronous and Asynchronous Serial Receiver and Transmitter
VDD Voltage to be applied to VDD
VREF Voltage reference
WDT Watchdog Timer
XOSC Crystal Oscillator