ESP8266/ESP32 SoC Comparison

EspressifComparison.md

	S2	S3	C2	C3	C6	ESP32	ESP8266
Announcement Date	2019, September	2020, December		2020, November	2021, April	2016, September	2014, August
Main Processor	Xtensa single-core LX7	Xtensa LX7 dual-core	RISC-V single-core	RISC-V single-core	RISC-V single-core	Xtensa LX6 single/dual-core	Tensilica L106
Clock Freq (up to)	240 MHz	240 MHz	120 MHz	160 MHz	160 MHz	160/240 MHz	160MHz
Co-processor	ULP (RISC-V)	ULP (RISC-V)				ULP	No
Cache	8/16KB			16KB		64KB
BT	No	BLE 5.0 + LE	BLE 5.0 + LE	BLE 5.0 + LE	BLE 5.0 + LE	BT 4.2 BR/EDR & BLE	No
WiFi	4	4		4	6	4	4 (only up to 72.2Mbps)
GPIO	43	45	14	22	30 (QFN40) or 22 (QFN32)	34	17
SRAM	320KB	512 KB	272 KB	400KB	512KB	520KB	160KB
ROM	128 KB	384KB	576 KB	384 KB	320KB		No
Flash encryption	XTS-AES-128/256			XTS-AES-128	XTS-AES-128		No
RTC memory	16KB	16KB		8KB		16KB	768B
SPI	4			3		4	2
UART	2			2		3	2
USB	USB OTG 1.1			Serial/JTAG		No	No
Touch Sensor	14					10
Timers	4x 64-bit			2x 54-bit + 1x 52-bit		4x 64b	2x 32b (*)
RMT	4x TX/RX			2x TX + 2x RX		8x TX/RX	1x TX 1x RX