Configuration Summary

  SAM C20J SAM C20G SAM C20E
Pins 64 (56 for WLCSP) 48 32
General Purpose I/O-pins (GPIOs) 52 38 26
Flash 256/128/64/32KB 256/128/64/32KB 256/128/64/32KB
Flash RWW section 8/4/2/1KB 8/4/2/1KB 8/4/2/1KB
System SRAM 32/16/8/4KB 32/16/8/4KB 32/16/8/4KB
Timer Counter (TC) instances 5 5 5
Waveform output channels per TC instance 2 2 2
Timer Counter for Control (TCC) instances 3 3 3
Waveform output channels per TCC 8/4/2 8/4/2 6/4/2
DMA channels 6 6 6
Configurable Custom Logic (CCL) (LUTs) 4 4 4
Serial Communication Interface (SERCOM) instances 4 4 4
Analog-to-Digital Converter (ADC) channels 12 12 10
Analog Comparators (AC) 2 2 2
Real-Time Counter (RTC) Yes Yes Yes
RTC alarms 1 1 1
RTC compare values

One 32-bit value or

two 16-bit values

One 32-bit value or

two 16-bit values

One 32-bit value or

two 16-bit values

External Interrupt lines 16 16 16

Peripheral Touch Controller (PTC)

Number of self-capacitance channels (Y-lines)

32

22

16

Peripheral Touch Controller (PTC)

Number of mutual-capacitance channels (X x Y lines)

256 (16x16)

121 (11x11)

64 (8x8)

Maximum CPU frequency 48MHz
Packages

QFN

TQFP

WLCSP

QFN

TQFP

QFN

TQFP

Oscillators

32.768kHz crystal oscillator (XOSC32K)

0.4-32MHz crystal oscillator (XOSC)

32.768kHz internal oscillator (OSC32K)

32KHz ultra-low-power internal oscillator (OSCULP32K)

48MHz high-accuracy internal oscillator (OSC48M)

96MHz Fractional Digital Phased Locked Loop (FDPLL96M)

Event System channels 6 6 6
SW Debug Interface Yes Yes Yes
Watchdog Timer (WDT) Yes Yes Yes