6.1 Signal Description
The following table gives details on signal names classified by peripheral.
| Signal Name | Function | Type | Active Level |
|---|---|---|---|
| Analog Comparators – AC | |||
| AIN[3:0] | AC Analog Inputs | Analog | — |
| CMP[1:0] | AC Comparator Outputs | Digital | — |
| Analog Digital Converter – ADC | |||
| AIN[19:0] | ADC Analog Inputs | Analog | — |
| VREFB | ADC Voltage External Reference B | Analog | — |
| External Interrupt Controller – EIC | |||
| EXTINT[15:0] | External Interrupts inputs | Digital | — |
| NMI | External Non-Maskable Interrupt input | Digital | — |
| Reset Controller – RSTC | |||
| EXTWAKE[7:0] | External wake-up inputs | Digital | — |
| 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 Inputs | Digital | — |
| OUT[3:0] | Logic Outputs | Digital | — |
| Supply Controller – SUPC | |||
| VBAT | External battery supply Inputs | Analog | — |
| PSOK | Main Power Supply OK input | Digital | — |
| OUT[1:0] | Logic Outputs | Digital | — |
| Power Manager – PM | |||
| RESETN | Reset input | Digital | Low |
| Serial Communication Interface – SERCOMx | |||
| PAD[3:0] | SERCOM Inputs/Outputs Pads | Digital | — |
| Oscillators Control – OSCCTRL | |||
| XIN | Crystal or external clock Input | Analog/Digital | — |
| XOUT | Crystal Output | Analog | — |
| 32KHz Oscillators Control – OSC32KCTRL | |||
| XIN32 | 32 KHz Crystal or external clock Input | Analog/Digital | — |
| XOUT32 | 32 KHz Crystal Output | Analog | — |
| Timer Counter – TCx | |||
| WO[1:0] | Waveform Outputs | Digital | — |
| Timer Counter – TCCx | |||
| WO[7:0] | Waveform Outputs | Digital | — |
| Peripheral Touch Controller – PTC | |||
| X[15:0] | PTC Input | Analog | — |
| Y[15:0] | PTC Input | Analog | — |
| General Purpose I/O – PORT | |||
| PA01 – PA00 | Parallel I/O Controller I/O Port A | Digital | — |
| PA09 – PA04 | Parallel I/O Controller I/O Port A | Digital | — |
| PA19 – PA12 | Parallel I/O Controller I/O Port A | Digital | — |
| PA25 – PA22 | Parallel I/O Controller I/O Port A | Digital | — |
| PA28 – PA27 | Parallel I/O Controller I/O Port A | Digital | — |
| PA31–PA30 | Parallel I/O Controller I/O Port A | Digital | — |
| PB03 – PB02 | Parallel I/O Controller I/O Port B | Digital | — |
| PB23 – PB22 | Parallel I/O Controller I/O Port B | Digital | — |
| Universal Serial Bus – USB | |||
| DP | DP for USB | Digital | — |
| DM | DM for USB | Digital | — |
| SOF 1 kHz | USB Start of Frame | Digital | — |