6.1 Signal Description

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

Table 6-1. Signal Descriptions List
Signal NameFunctionTypeActive Level
Analog Comparators – AC
AIN[3:0]AC Analog InputsAnalog—
CMP[1:0]AC Comparator OutputsDigital—
Analog Digital Converter – ADC
AIN[19:0]ADC Analog InputsAnalog—
VREFBADC Voltage External Reference BAnalog—
External Interrupt Controller – EIC
EXTINT[15:0]External Interrupts inputsDigital—
NMIExternal Non-Maskable Interrupt inputDigital—
Reset Controller – RSTC
EXTWAKE[7:0]External wake-up inputsDigital—
Generic Clock Generator – GCLK
GCLK_IO[7:0]Generic Clock (source clock inputs or generic clock generator output)Digital—
Custom Control Logic – CCL
IN[11:0]Logic InputsDigital—
OUT[3:0]Logic OutputsDigital—
Supply Controller – SUPC
VBATExternal battery supply InputsAnalog—
PSOKMain Power Supply OK inputDigital—
OUT[1:0]Logic OutputsDigital—
Power Manager – PM
RESETNReset inputDigitalLow
Serial Communication Interface – SERCOMx
PAD[3:0]SERCOM Inputs/Outputs PadsDigital—
Oscillators Control – OSCCTRL
XINCrystal or external clock InputAnalog/Digital—
XOUTCrystal OutputAnalog—
32KHz Oscillators Control – OSC32KCTRL
XIN3232 KHz Crystal or external clock InputAnalog/Digital—
XOUT3232 KHz Crystal OutputAnalog—
Timer Counter – TCx
WO[1:0]Waveform OutputsDigital—
Timer Counter – TCCx
WO[7:0]Waveform OutputsDigital—
Peripheral Touch Controller – PTC
X[15:0]PTC InputAnalog—
Y[15:0]PTC InputAnalog—
General Purpose I/O – PORT
PA01 – PA00Parallel I/O Controller I/O Port ADigital—
PA09 – PA04Parallel I/O Controller I/O Port ADigital—
PA19 – PA12Parallel I/O Controller I/O Port ADigital—
PA25 – PA22Parallel I/O Controller I/O Port ADigital—
PA28 – PA27Parallel I/O Controller I/O Port ADigital—
PA31–PA30Parallel I/O Controller I/O Port A Digital—
PB03 – PB02Parallel I/O Controller I/O Port BDigital—
PB23 – PB22Parallel I/O Controller I/O Port BDigital—
Universal Serial Bus – USB
DPDP for USBDigital—
DMDM for USBDigital—
SOF 1 kHzUSB Start of FrameDigital—