6 Signal Descriptions List

The following table gives details on signal names classified by peripheral.

Signal NameFunctionTypeActive Level
Analog Comparators - AC
AIN[3:0]AC Analog InputsAnalog
CMP[:0]AC Comparator OutputsDigital
Analog Digital Converter - ADC
AIN[19:0]ADC Analog InputsAnalog
VREFAADC Voltage External Reference AAnalog
VREFBADC Voltage External Reference BAnalog
Digital Analog Converter - DAC
VOUTDAC Voltage outputAnalog
VREFADAC Voltage External ReferenceAnalog
External Interrupt Controller
EXTINT[15:0]External InterruptsInput
NMIExternal Non-Maskable InterruptInput
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 ClockI/O
SCK[1:0]Serial ClockI/O
FS[1:0]I2S Word Select or TDM Frame SyncI/O
SD[1:0]Serial Data Input or OutputI/O
Power Manager - PM
RESETResetInputLow
Serial Communication Interface - SERCOMx
PAD[3:0]SERCOM I/O PadsI/O
System Control - SYSCTRL
XINCrystal InputAnalog/ Digital
XIN3232kHz Crystal InputAnalog/ Digital
XOUTCrystal OutputAnalog
XOUT3232kHz Crystal OutputAnalog
Timer Counter - TCx
WO[1:0]Waveform/PWM Outputs/ Capture InputsOutput
Timer Counter - TCCx
WO[7:0]Waveform/PWM OutputsOutput
Peripheral Touch Controller - PTC
X[15:0]PTC InputAnalog
Y[15:0]PTC InputAnalog
General Purpose I/O - PORT
PA25 - PA00Parallel I/O Controller I/O Port AI/O
PA28 - PA27Parallel I/O Controller I/O Port AI/O
PA31 - PA30Parallel I/O Controller I/O Port AI/O
PB17 - PB00Parallel I/O Controller I/O Port BI/O
PB23 - PB22Parallel I/O Controller I/O Port BI/O
PB31 - PB30Parallel I/O Controller I/O Port BI/O
Universal Serial Bus - USB
DPDP for USBI/O
DMDM for USBI/O
SOF 1kHzUSB Start of FrameI/O