Datasheet

6. Signal Descriptions List
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[:0] AC Comparator Outputs Digital
Analog Digital Converter - ADC
AIN[19:0] ADC Analog Inputs Analog
VREFA ADC Voltage External Reference A Analog
VREFB ADC Voltage External Reference B Analog
Digital Analog Converter - DAC
VOUT DAC Voltage output Analog
VREFA DAC Voltage External Reference Analog
External Interrupt Controller
EXTINT[15:0] External Interrupts Input
NMI External Non-Maskable Interrupt Input
Generic Clock Generator - GCLK
GCLK_IO[7:0] Generic Clock (source clock or generic clock generator
output)
I/O
Inter-IC Sound Controller - I
2
S
MCK[1:0] Master Clock I/O
SCK[1:0] Serial Clock I/O
FS[1:0] I
2
S Word Select or TDM Frame Sync I/O
SD[1:0] Serial Data Input or Output I/O
Power Manager - PM
RESETN Reset Input Low
Serial Communication Interface - SERCOMx
PAD[3:0] SERCOM I/O Pads I/O
System Control - SYSCTRL
XIN Crystal Input Analog/ Digital
XIN32 32kHz Crystal Input Analog/ Digital
XOUT Crystal Output Analog
SAM D21 Family
Signal Descriptions List
© 2018 Microchip Technology Inc.
Datasheet Complete
DS40001882D-page 26