5 Signal Description
The following tables provide the details on signal names classified by the peripheral.
| Signal Name | Function | Type |
|---|---|---|
| Analog Comparators (AC) | ||
| AIN[3:0] | AC Analog Inputs | Analog Input |
| CMP[1:0] | AC Comparator Outputs | Digital Output |
| Analog-to- Digital Converter ( ADCx) | ||
| AIN[11:0] | ADC Analog Inputs | Analog Input |
| VREFA(1) | ADC Voltage External Reference A | Analog Input |
| Digital-to-Analog Converter (DAC) | ||
| VOUT | DAC Voltage output | Analog Output |
| VREFA(1) | DAC Voltage External Reference A | Analog Input |
| Sigma-Delta Analog-to-Digital Converter (SDADC) | ||
| INN[1:0] | SDADC Analog Negative Inputs | Analog Input |
| INP[1:0] | SDADC Analog Positive Inputs | Analog Input |
| VREFB | SDADC Voltage External Reference B | Analog Input |
| External Interrupt Controller (EIC) | ||
| EXTINT[15:0] | External Interrupts inputs | Digital Input |
| NMI | External Non-Maskable Interrupt input | Digital Input |
| General Purpose I/O (PORT) | ||
| PA31-PA30, PA28-PA27, PA25-PA00 | General Purpose I/O Pin in Port A | Digital I/O |
| PB23-PB22,PB11-PB08,PB03-PB02 | General Purpose I/O Pin in Port B | Digital I/O |
| Generic Clock Generator (GCLK) | ||
| GCLK_IO[8:0] (2) | Generic Clock Source (Input) or Generic Clock Signal (Output) | Digital I/O |
| Custom Control Logic (CCL) | ||
| IN[11:0] | Inputs to lookup table | Digital Input |
| OUT[3:0] | Outputs from lookup table | Digital Output |
| Power Manager (PM) | ||
| RESET_N | External Reset Pin (Active Level: LOW) | Digital Input |
| Serial Communication Interface (SERCOMx) | ||
| PAD[3:0] | SERCOM Inputs/Outputs Pads | Digital I/O |
| Oscillators Control (OSCCTRL) | ||
| XIN | Crystal Input or External Clock Input | Analog Input (Crystal Oscillator) Digital Input (External Clock) |
| XOUT | Crystal Output | Analog Output |
| 32 kHz Oscillators Control (OSC32KCTRL) | ||
| XIN32 | 32 kHz Crystal Input or External Clock Input | Analog Input (Crystal Oscillator) Digital Input (External Clock) |
| XOUT32 | 32 kHz Crystal Output | Analog Output |
| Timer Counter (TCx) | ||
| WO[1:0] | Waveform Outputs | Digital I/O |
| Timer Counter (TCCx) | ||
| WO[7:0] | Waveform Outputs | Digital I/O |
| Position Decoder (PDEC) | ||
| PDEC[2:0] | PDEC Input | Digital Input |
| Serial Wire Debug Interface | ||
| SWCLK | Serial Wire Debug Clock | Digital Input |
| SWDIO | Serial Wire Debug Data | Digital I/O |
Note:
- VREFA is shared between the ADC and DAC peripherals.
- GCLK8 does not support an input/output on a pin.