5 Signal Descriptions List

The following table provides details on signal names classified by peripherals.

Signal NameFunctionTypeActive Level
Analog Comparators - AC
AIN[3:0]AC Analog InputsAnalog
CMP[1:0]AC Comparator OutputsDigital
Analog-to-Digital Converter (ADC)
AIN[19:0]ADC Analog InputsAnalog
VREFAADC Voltage External Reference AAnalog
VREFBADC Voltage External Reference BAnalog
Digital-to-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
Power Manager - PM
RESETResetInputLow
Serial Communication Interface - SERCOMx
PAD[3:0]SERCOM I/O PadsI/O
System Control - SYSCTRL
XINCrystal InputAnalog/Digital
XIN3232 kHz Crystal InputAnalog/Digital
XOUTCrystal OutputAnalog
XOUT3232 kHz Crystal OutputAnalog
Timer Counter - TCx
WO[1:0]Waveform OutputsOutput
Peripheral Touch Controller - PTC
X[15:0]PTC OutputAnalog
Y[15:0]PTC Input/OutputAnalog
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