Esp32 series -- comparison of esp32 series

One 、 Purpose

        This article mainly shows ESP32 Comparison information of each series （ Carry ESP-IDF Developing documents ）, For your reference , Please refer to the official chip data manual for more details

Feature	ESP32 Series	ESP32-S2 Series	ESP32-C3 Series	ESP32-S3 Series
Launch year	2016	2020	2020	2020
Variants	See ESP32 Datasheet (PDF)	See ESP32-S2 Datasheet (PDF)	See ESP32-C3 Datasheet (PDF)	See ESP32-S3 Datasheet (PDF)
Core	Xtensa dual-/single core 32-bit LX6	Xtensa single-core 32-bit LX7	32-bit single-core RISC-V	Xtensa dual-core 32-bit LX7
Wi-Fi protocols	802.11 b/g/n, 2.4 GHz	802.11 b/g/n, 2.4 GHz	802.11 b/g/n, 2.4 GHz	802.11 b/g/n, 2.4 GHz
Bluetooth	Bluetooth v4.2 BR/EDR and Bluetooth Low Energy	️	Bluetooth 5.0	Bluetooth 5.0
Typical frequency	240 MHz (160 MHz for ESP32-S0WD)	240 MHz	160 MHz	240 MHz
SRAM	520 KB	320 KB	400 KB	512 KB
ROM	448 KB for booting and core functions	128 KB for booting and core functions	384 KB for booting and core functions	384 KB for booting and core functions
Embedded flash	2 MB, 4 MB, or none, depending on variants	2 MB, 4 MB, or none, depending on variants	4 MB or none, depending on variants	8 MB or none, depending on variants
External flash	Up to 16 MB device, address 11 MB + 248 KB each time	Up to 1 GB device, address 11.5 MB each time	Up to 16 MB device, address 8 MB each time	Up to 1 GB device, address 32 MB each time
External RAM	Up to 8 MB device, address 4 MB each time	Up to 1 GB device, address 11.5 MB each time	️	Up to 1 GB device, address 32 MB each time
Cache	️ Two-way set associative	️ Four-way set associative, independent instruction cache and data cache	️ Eight-way set associative, 32-bit data/instruction bus width	️ Four-way or eight-way set associative for instruction cache; four-way set associative for data cache, 32-bit data/instruction bus width
Peripherals
ADC	Two 12-bit, 18 channels	Two 12-bit, 20 channels	Two 12-bit SAR ADCs, at most 6 channels	Two 12-bit SAR ADCs, 20 channels
DAC	Two 8-bit channels	Two 8-bit channels	️	️
Timers	Four 64-bit general-purpose timers, and three watchdog timers	Four 64-bit general-purpose timers, and three watchdog timers	Two 54-bit general-purpose timers, and three watchdog timers	Four 54-bit general-purpose timers, and three watchdog timers
Temperature sensor	️	1	1	1
Touch sensor	10	14	️	14
Hall sensor	1	️	️	️
GPIO	34	43	22	45
SPI	4	4	3	4
LCD interface	1	1	️	1
UART	3	2 1	2 1	3
I2C	2	2	1	2
I2S	2, can be configured to operate with 8/16/32/40/48-bit resolution as an input or output channel.	1, can be configured to operate with 8/16/24/32/48/64-bit resolution as an input or output channel.	1, can be configured to operate with 8/16/24/32-bit resolution as an input or output channel.	2, can be configured to operate with 8/16/24/32-bit resolution as an input or output channel.
Camera interface	1	1	️	1
DMA	Dedicated DMA to UART, SPI, I2S, SDIO slave, SD/MMC host, EMAC, BT, and Wi-Fi	Dedicated DMA to UART, SPI, AES, SHA, I2S, and ADC Controller	General-purpose, 3 TX channels, 3 RX channels	General-purpose, 5 TX channels, 5 RX channels
RMT	8 channels	4 channels 1, can be configured to TX/RX channels	4 channels 2, 2 TX channels, 2 RX channels	8 channels 2, 4 TX channels, 4 RX channels
Pulse counter	8 channels	4 channels 1	️	4 channels 1
LED PWM	16 channels	8 channels 1	6 channels 2	8 channels 1
MCPWM	2, six PWM outputs	️	️	2, six PWM outputs
USB OTG	️	1	️	1
TWAI controller (compatible with ISO 11898-1)	1	1	1	1
SD/SDIO/MMC host controller	1	️	️	1
SDIO slave controller	1	️	️	️
Ethernet MAC	1	️	️	️
ULP	ULP FSM	PicoRV32 core with 8 KB SRAM, ULP FSM	️	PicoRV32 core with 8 KB SRAM, ULP FSM
Debug Assist	️	️	1	️
Security
Secure boot	️	️ Faster and safer, compared with ESP32	️ Faster and safer, compared with ESP32	️ Faster and safer, compared with ESP32
Flash encryption	️	️ Support for PSRAM encryption. Safer, compared with ESP32	️ Safer, compared with ESP32	️ Support for PSRAM encryption. Safer, compared with ESP32
OTP	1024-bit	4096-bit	4096-bit	4096-bit
AES	️ AES-128, AES-192, AES-256 (FIPS PUB 197)	️ AES-128, AES-192, AES-256 (FIPS PUB 197); DMA support	️ AES-128, AES-256 (FIPS PUB 197); DMA support	️ AES-128, AES-256 (FIPS PUB 197); DMA support
HASH	SHA-1, SHA-256, SHA-384, SHA-512 (FIPS PUB 180-4)	SHA-1, SHA-224, SHA-256, SHA-384, SHA-512, SHA-512/224, SHA-512/256, SHA-512/t (FIPS PUB 180-4); DMA support	SHA-1, SHA-224, SHA-256 (FIPS PUB 180-4); DMA support	SHA-1, SHA-224, SHA-256, SHA-384, SHA-512, SHA-512/224, SHA-512/256, SHA-512/t (FIPS PUB 180-4); DMA support
RSA	Up to 4096 bits	Up to 4096 bits	Up to 3072 bits	Up to 4096 bits
RNG	️	️	️	️
HMAC	️	️	️	️
Digital signature	️	️	️	️
XTS	️	️ XTS-AES-128, XTS-AES-256	️ XTS-AES-128	️ XTS-AES-128, XTS-AES-256
Other
Deep-sleep (ULP sensor-monitored pattern)	100 μA (when ADC work with a duty cycle of 1%)	22 μA (when touch sensors work with a duty cycle of 1%)	No such pattern	TBD
Size	QFN48 5*5, 6*6, depending on variants	QFN56 7*7	QFN32 5*5	QFN56 7*7