5 Signal Descriptions List

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

Table 5-1. Signal Descriptions List
Signal NameFunctionType
Device Service Unit (DSU)
SWCLKSerial Wire ClockDigital Input
SWDIOSerial Wire Bidirectional Data PinDigital I/O
RESETExternal Reset Pin (Active Level: LOW)Digital Input
Trace Port Interface Unit (TPIU)
TRACEDATA[3:0]Trace Data OutputDigital Output
TRACECLKTrace ClockDigital Output
SWOSerial Wire OutputDigital Output
Analog Comparators (AC)
CMP[1:0]AC Comparator OutputsDigital Output
AIN[3:0]AC Comparator InputsAnalog Input
Analog Digital Converter (ADC)
AIN[15:0]ADC Input ChannelsAnalog Input
VREFAADC External Reference Voltage AAnalog Input
VREFBADC External Reference Voltage BAnalog Input
VREFCADC External Reference Voltage CAnalog Input
Peripheral Touch Controller (PTC)
XY[31:0]X-lines and Y-linesDigital Output (X-line) /Analog I/O (Y-line)
Digital Analog Converter (DAC)
VOUT[1:0]DAC Voltage OutputsAnalog Output
VREFADAC External Reference VoltageAnalog Input
External Interrupt Controller (EIC)
EXTINT[15:0]External Interrupts PinsDigital Input
NMINon-Maskable Interrupt PinDigital Input
Generic Clock Generator (GCLK)
GCLK_IO[7:0]Generators Clock Source (Input) or Generic Clock Signal (Output)Digital I/O
Custom Control Logic (CCL)
IN[11:0]Inputs to lookup tableDigital Input
OUT[3:0]Outputs from lookup tableDigital Output
Supply Controller (SUPC)
VBAT (PB03)External battery supply Analog Input
OUT[1:0]Logic OutputsDigital Output
Reset Controller (RSTC)
RESETExternal Reset Pin (Active Level: LOW)Digital Input
Oscillators Control (OSCCTRL)
XINCrystal Oscillator or External Clock InputAnalog Input (Crystal Oscillator)/Digital Input (External Clock)
XOUTCrystal Oscillator OutputAnalog Output
32 kHz Oscillators Control (OSC32KCTRL)
XIN3232.768 kHz Crystal Oscillator or External Clock InputAnalog Input (Crystal Oscillator)/Digital Input (External Clock)
XOUT3232.768 kHz Crystal Oscillator OutputAnalog Output
General Purpose I/O (PORT)
PA31 - PA30, PA27, PA25 - PA00General Purpose I/O Pin in Port ADigital I/O
PB31 - PB30, PB25-PB00General Purpose I/O Pin in Port BDigital I/O
PC31 - PC30, PC28 - PC10, PC07 - PC05, PC03-PC00General Purpose I/O Pin in Port CDigital I/O
PD21-PD20, PD12 - PD08, PD01 - PD00General Purpose I/O Pin in Port DDigital I/O
Real-Time Counter (RTC)
IN[4:0]Tamper Detection InputsDigital Input
OUTTamper Detection OutputsDigital Output
Timer Counter (TCx)
WO[1:0]Capture Inputs or Waveform OutputsDigital I/O
Timer Counter (TCCx)
WO[7:0]Capture Inputs or Waveform OutputsDigital I/O
Position Decoder (PDEC)
QDI[2:0]Peripheral Decoder InputsDigital Input
Parallel Capture Controller (PCC)
DEN1Sensor Data Enable 1Digital Input
DEN2Sensor Data Enable 2Digital Input
CLKSensor ClockDigital Input
DATA[13:0]Sensor DataDigital Input
Serial Communication Interface (SERCOMx)
PAD[3:0]General SERCOM PinsDigital I/O
Quad Serial Peripheral Interface (QSPI)
SCKSerial ClockDigital Output
CSChip SelectDigital Output
DATA[3:0]Data Input/OutputDigital I/O
Ethernet MAC (GMAC)
GTXENTransmit EnableDigital Output
GTXCKTransmit Clock or Reference ClockDigital I/O
GTX[3:0]Transmit DataDigital Output
GTXERTransmit Coding ErrorDigital I/O
GRXERReceive ErrorDigital I/O
GRXCKReceive ClockDigital I/O
GRX[3:0]Receive DataDigital I/O
GRXDVReceive Data ValidDigital I/O
GCOLCollision DetectDigital I/O
GCRSCarrier Sense and Data ValidDigital I/O
GTSUCOMPTSU Timer Comparison ValidDigital I/O
GMDIOManagement Data Input/OutputDigital I/O
GMDCManagement Data ClockDigital Output
Universal Serial Bus (USB)
DPDifferential Data Line + PortDigital I/O
DMDifferential Data Line - PortDigital I/O
SOF 1kHzUSB Start of Frame OutputDigital Output
Control Area Network (CANx)
TXCAN TransmitDigital Output
RXCAN ReceiveDigital Input
Inter-IC Sound Controller (I2S)
MCK1, MCK0Host Clock PinsDigital I/O
SCK1, SCK0Serial Clock PinsDigital I/O
FS1, FS0I2S Word Select / TDM Frame Sync PinsDigital I/O
SDOSerial Data Output for Transmit SerializerDigital Output
SDISerial Data Input for Receive SerializerDigital Input
SD/MMC Host Controller (SDHCx)
CDSD Card / SDIO / e.MMC Card DetectDigital Input
CMDSD Card / SDIO / e.MMC Command/Response LineDigital I/O
WPSD Card Connector Write Protect SignalDigital Input
CKSD Card / SDIO / e.MMC Clock SignalDigital Output
DAT[3:0]SD Card / SDIO / e.MMC Data LinesDigital I/O