1 Configuration Summary

Table 1-1. SAM C20 Device-specific Features
Device	Flash (KB)	SRAM (KB)
ATSAMC20E15	32	4
ATSAMC20E16	64	8
ATSAMC20E17	128	16
ATSAMC20E18	256	32
ATSAMC20G15	32	4
ATSAMC20G16	64	8
ATSAMC20G17	128	16
ATSAMC20G18	256	32
ATSAMC20J15	32	4
ATSAMC20J16	64	8
ATSAMC20J17	128	16
ATSAMC20J18	256	32
ATSAMC20N17	128	16
ATSAMC20N18	256	32

Table 1-2. SAM C21 Device-specific Features
Device	Flash (KB)	SRAM (KB)
ATSAMC21E15	32	4
ATSAMC21E16	64	8
ATSAMC21E17	128	16
ATSAMC21E18	256	32
ATSAMC21G15	32	4
ATSAMC21G16	64	8
ATSAMC21G17	128	16
ATSAMC21G18	256	32
ATSAMC21J15	32	4
ATSAMC21J16	64	8
ATSAMC21J17	128	16
ATSAMC21J18	256	32
ATSAMC21N17	128	16
ATSAMC21N18	256	32

Table 1-3. SAM C21 Family Features
	SAM C21N	SAM C21J	SAM C21G	SAM C21E
Pins	100	64 (56 for WLCSP)	48	32
General Purpose I/O-pins (GPIOs)	84	52 (44 for WLCSP)	38	26
Flash	256/128 KB	256/128/64/32 KB	256/128/64/32 KB	256/128/64/32 KB
Flash RWW section	8/4 KB	8/4/2/1 KB	8/4/2/1 KB	8/4/2/1 KB
System SRAM	32/16 KB	32/16/8/4 KB	32/16/8/4 KB	32/16/8/4 KB
Timer Counter (TC) instances	8	5	5	5
Waveform/PWM output / Capture Input channels per TC instance	2	2	2	2
TC Maximum and Minimum Capture	Yes	No	No	No
Timer Counter for Control (TCC) instances	3	3	3	3
Waveform/PWM output channels per TCC (TCC0/TCC1/TCC2)	8/4/2	8/4/2	8/4/2	8/4/2
DMA channels	12	12	12	12
CAN interface	2	2	2	1
Configurable Custom Logic (CCL) (LUTs)	4	4	4	4
Serial Communication Interface (SERCOM) instances	8	6	6	4
Divide and Square Root Accelerator (DIVAS)	Yes	Yes	Yes	Yes
Analog-to-Digital Converter (ADC) channels	22	20	14	10
Analog-to-Digital Converter (ADC) instances	2	2	2	2
Sigma-Delta Analog-to-Digital Converter (SDADC) channels	3	3	2	1
Analog Comparators (AC)	4	4	4	4
Digital-to-Analog Converter (DAC) channels	1	1	1	1
Temperature Sensor (TSENS)⁽¹⁾	1	1	1	1
Real-Time Counter (RTC)	Yes	Yes	Yes	Yes
RTC alarms	1	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	One 32-bit value or two 16-bit values
External Interrupt lines	16 with HW debouncing	16	16	16
Peripheral Touch Controller (PTC) Number of self-capacitance channels (Y-lines)	32	32	22	16
Peripheral Touch Controller (PTC) Number of mutual-capacitance channels (X x Y lines)	256 (16x16)	256 (16x16)	121 (11x11)	64 (8x8)
Frequency Meter (FREQM) reference clock divider	Yes	Yes	Yes	Yes
Maximum CPU frequency	48 / 64 MHz ⁽²⁾
Packages	TQFP	VQFN TQFP WLCSP	VQFN TQFP	VQFN TQFP
Oscillators	32.768 kHz crystal oscillator (XOSC32K) 0.4-32 MHz crystal oscillator (XOSC) 32.768 kHz internal oscillator (OSC32K) 32.768 kHz ultra low-power internal oscillator (OSCULP32K) 48 MHz high-accuracy internal oscillator (OSC48M) 96 MHz Fractional Digital Phased Locked Loop (FDPLL96M)
Event System channels	12	12	12	12
SW Debug Interface	Yes	Yes	Yes	Yes
Watchdog Timer (WDT)	Yes	Yes	Yes	Yes

Note:

TSENS is not available in AEC - Q100 qualified device part numbers.
See the Ordering Information section to determine the parts running at 48 MHz or 64 MHz.

Table 1-4. SAM C20 Family Features
	SAM C20N	SAM C20J	SAM C20G	SAM C20E
Pins	100	64 (56 for WLCSP)	48 (44 for WLCSP)	32
General Purpose I/O-pins (GPIOs)	84	52	38	26
Flash	256/128 KB	256/128/64/32 KB	256/128/64/32 KB	256/128/64/32 KB
Flash RWW section	8/4 KB	8/4/2/1 KB	8/4/2/1 KB	8/4/2/1 KB
System SRAM	32/16 KB	32/16/8/4 KB	32/16/8/4 KB	32/16/8/4 KB
Timer Counter (TC) instances	8	5	5	5
Waveform/PWM output / Capture Input channels per TC instance	2	2	2	2
TC Maximum and Minimum Capture	Yes	No	No	No
Timer Counter for Control (TCC) instances	3	3	3	3
Waveform output channels per TCC (TCC0/TCC1/TCC2)	8/4/2	8/4/2	8/4/2	8/4/2
DMA channels	12	6	6	6
Configurable Custom Logic (CCL) (LUTs)	4	4	4	4
Serial Communication Interface (SERCOM) instances	8	4	4	4
Divide and Square Root Accelerator (DIVAS)	Yes	Yes	Yes	Yes
Analog-to-Digital Converter (ADC) channels	12	12	12	10
Analog-to-Digital Converter (ADC) instances	1	1	1	1
Analog Comparators (AC)	4	2	2	2
Real-Time Counter (RTC)	Yes	Yes	Yes	Yes
RTC alarms	1	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	One 32-bit value or two 16-bit values
External Interrupt lines	16 with HW debouncing	16	16	16
Peripheral Touch Controller (PTC) Number of self-capacitance channels (Y-lines)	32	32	22	16
Peripheral Touch Controller (PTC) Number of mutual-capacitance channels (X x Y lines)	256 (16x16)	256 (16x16)	121 (11x11)	64 (8x8)
Frequency Meter (FREQM) reference clock divider	Yes	Yes	Yes	Yes
Maximum CPU frequency	48 / 64 MHz ⁽¹⁾
Packages	TQFP	VQFN TQFP WLCSP	VQFN TQFP	VQFN TQFP
Oscillators	32.768 kHz crystal oscillator (XOSC32K) 0.4-32 MHz crystal oscillator (XOSC) 32.768 kHz internal oscillator (OSC32K) 32.768 kHz ultra low-power internal oscillator (OSCULP32K) 48 MHz high-accuracy internal oscillator (OSC48M) 96 MHz Fractional Digital Phased Locked Loop (FDPLL96M)
Event System channels	12	12	12	12
SW Debug Interface	Yes	Yes	Yes	Yes
Watchdog Timer (WDT)	Yes	Yes	Yes	Yes

Note:

See the Ordering Information section to determine the parts running at 48Mhz or 64MHz.