6 Signal Descriptions List

The table below provides details on signal names classified by peripheral.


Signal Name	Function	Type	Active Level
Analog Comparators - AC
AIN[3:0]	AC Analog Inputs	Analog
CMP[:0]	AC Comparator Outputs	Digital
Analog-to-Digital Converter - ADC
AIN[19:0]	ADC Analog Inputs	Analog
VREFA	ADC Voltage External Reference A	Analog
VREFB	ADC Voltage External Reference B	Analog
Digital-to-Analog Converter - DAC
VOUT	DAC Voltage output	Analog
VREFA	DAC Voltage External Reference	Analog
External Interrupt Controller
EXTINT[15:0]	External Interrupts	Input
NMI	External Non-Maskable Interrupt	Input
Generic Clock Generator - GCLK
GCLK_IO[7:0]	Generic Clock (source clock or generic clock generator output)	I/O
Inter-IC Sound Controller - I²S
MCK[1:0]	Host Clock	I/O
SCK[1:0]	Serial Clock	I/O
FS[1:0]	I²S Word Select or TDM Frame Sync	I/O
SD[1:0]	Serial Data Input or Output	I/O
Power Manager - PM
RESET	Reset	Input	Low
Serial Communication Interface - SERCOMx
PAD[3:0]	SERCOM I/O Pads	I/O
System Control - SYSCTRL
XIN	Crystal Input	Analog/ Digital
XIN32	32 kHz Crystal Input	Analog/ Digital
XOUT	Crystal Output	Analog
XOUT32	32 kHz Crystal Output	Analog
Timer Counter - TCx
WO[1:0]	Waveform/PWM Outputs/ Capture Inputs	Output
Timer Counter - TCCx
WO[7:0]	Waveform/PWM Outputs	Output
Peripheral Touch Controller - PTC
X[15:0]	PTC Input	Analog
Y[15:0]	PTC Input	Analog
General Purpose I/O - PORT
PA25 - PA00	Parallel I/O Controller I/O Port A	I/O
PA28 - PA27	Parallel I/O Controller I/O Port A	I/O
PA31 - PA30	Parallel I/O Controller I/O Port A	I/O
PB17 - PB00	Parallel I/O Controller I/O Port B	I/O
PB23 - PB22	Parallel I/O Controller I/O Port B	I/O
PB31 - PB30	Parallel I/O Controller I/O Port B	I/O
Universal Serial Bus - USB
DP	DP for USB	I/O
DM	DM for USB	I/O
SOF 1kHz	USB Start of Frame	I/O