The following table provides details on signal names classified by peripherals.
| Signal Name | Function | Type |
|---|---|---|
| Generic Clock Generator - GCLK | ||
| GCLK_IO[4:0] | Generators Clock Source (Input) or Generic Clock Signal (Output) | Digital I/O |
| Oscillators Control - OSCCTRL | ||
| XIN | Crystal Oscillator or External Clock Input | Analog Input (Crystal Oscillator)/Digital Input (External Clock) |
| XOUT | Crystal Oscillator Output | Analog Output |
| 32 kHz Oscillators Control - OSC32KCTRL | ||
| XIN32 | 32.768 kHz Crystal Oscillator or External Clock Input | Analog Input (Crystal Oscillator)/Digital Input (External Clock) |
| XOUT32 | 32.768 kHz Crystal Oscillator Output | Analog Output |
| Serial Communication Interface - SERCOMx | ||
| PAD[3:0] | General SERCOM Pins | Digital I/O |
| Timer Counter - TCx | ||
| WO[1:0] | Capture Inputs or Waveform Outputs | Digital I/O |
| Real Timer Clock - RTC | ||
| IN[3:0] | Tamper Detection Inputs | Digital Input |
| OUT[3:0] | Tamper Detection Outputs | Digital Output |
| Analog Comparators - AC | ||
| AIN[3:0] | AC Comparator Inputs | Analog Input |
| CMP[1:0] | AC Comparator Outputs | Digital Output |
| Analog Digital Converter - ADC | ||
| AIN[9:0] | ADC Input Channels | Analog Input |
| VREFA(1) | ADC External Reference Voltage A | Analog Input |
| VREFB | ADC External Reference Voltage B | Analog Input |
| Digital Analog Converter - DAC | ||
| VOUT | DAC Voltage Output | Analog Output |
| VREFA(1) | DAC External Reference Voltage A | Analog Input |
| Operational Amplifier - OPAMP | ||
| OA[2:0]NEG | OPAMP Negative Inputs | Analog Input |
| OA[2:0]POS | OPAMP Positive Inputs | Analog Input |
| OA0OUT / OA2OUT | OPAMP Outputs | Analog Output |
| Peripheral Touch Controller - PTC | ||
| XY[19:0] | X-lines and Y-lines | Digital Output (X-line) /Analog I/O (Y-line) |
| Custom Control Logic - CCL | ||
| IN[5:0] | Inputs to lookup table | Digital Input |
| OUT[1:0] | Outputs from lookup table | Digital Output |
| External Interrupt Controller - EIC | ||
| EXTINT[7:0] | External Interrupts Pins | Digital Input |
| NMI | Non-Maskable Interrupt Pin | Digital Input |
| General Purpose I/O - PORT | ||
| PA11-PA00 / PA19-PA14 / PA25-PA22 / PA27 / PA31-PA30 | General Purpose I/O Pin in Port A | Digital I/O |
| Reset Controller - RSTC | ||
| RESET | External Reset Pin (Active Level: LOW) | Digital Input |
| Debug Service Unit - DSU | ||
| SWCLK | Serial Wire Clock | Digital Input |
| SWDIO | Serial Wire Bidirectional Data Pin | Digital I/O |