【Beetle ESP32-C3】Hardware Analysis

dcexpert

【Beetle ESP32-C3】Hardware Analysis [Copy link]

The information of Beetle ESP32-C3 development board can be found on the DFRobot website at the following link: https://wiki.dfrobot.com.cn/_SKU_DFR0868_Beetle_ESP32_C3.

First look at the schematic diagram of the development board . You can see that there are very few components on the entire development board, mainly the ESP32-C3-mini module, power supply and interface.

The Beetle ESP32-C3 development board uses a Type-C interface, so you can use the data cable of your mobile phone without having to look for a data cable, which is very convenient. Because ESP32-C3 has USB function, there is no separate USB to serial port chip on the development board. In addition to power supply, this USB interface can also download programs.

There are two chips on the back of the development board. The left one is the LDO RT9080 with a static current of 2uA and an output of 600mA, and the right one is the lithium battery charging management chip TP4057 with a maximum charging current of 500mA. The development board can be powered by USB or lithium battery. The USB can charge the lithium battery while supplying power. The two are isolated by diodes and output to the LDO.

There are two 0402 package LEDs on the development board, one (green) is used for charging indication, and the other (blue) is connected to GPIO10 and can be controlled by the program.

dcexpert

The main control chip is ESP32-C3. Compared with ESP32, in addition to the different core, the peripherals have also been cut down to further reduce the cost. The following is a comparison of several different series of ESP32:

characteristic	ESP32 Series	ESP32-S2 Series	ESP32-C3 Series	ESP32-S3 Series
Release time	2016	2020	2020	2020
Product Model	Please refer to the ESP32 Technical Specification (PDF)	Please refer to the ESP32-S2 Technical Specification (PDF)	Please refer to the ESP32-C3 Technical Specification (PDF)	Please refer to the ESP32-S3 Technical Specification (PDF)
Kernel	Equipped with low-power Xtensa LX6 32-bit dual-core/single-core processor	Equipped with low-power Xtensa LX7 32-bit single-core processor	Equipped with RISC-V 32-bit single-core processor	Equipped with low-power Xtensa LX7 32-bit dual-core processor
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
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 program startup and kernel function calls	128 KB for program startup and kernel function calls	384 KB for program startup and kernel function calls	384 KB for program startup and kernel function calls
Embedded flash	2 MB, 4 MB or no embedded flash, varies by model	2 MB, 4 MB or no embedded flash, varies by model	4 MB or no embedded flash, varies by model	8 MB or no embedded flash, varies by model
External flash	Supports up to 16 MB, and can map up to 11 MB + 248 KB at a time	Supports up to 1 GB, and can map up to 11.5 MB at a time	The maximum supported size is 16 MB, and a maximum of 8 MB can be mapped at a time	Supports up to 1 GB, and can map up to 32 MB at a time
Off-chip RAM	Supports up to 8 MB, and can map up to 4 MB at a time	Supports up to 1 GB, and can map up to 11.5 MB at a time		Supports up to 1 GB, and can map up to 32 MB at a time
Cache	2-way group associative	4-way set associative, independent instruction and data caches	8-way group-connected, 32-bit data/instruction bus width	Instruction cache can be configured as 4-way set associative or 8-way set associative, data cache is fixed as 4-way set associative, 32-bit data/instruction bus width
Peripherals
Analog-to-digital converter (ADC)	Two 12-bit SAR ADCs, up to 18 channels	Two 12-bit SAR ADCs, up to 20 channels	Two 12-bit SAR ADCs, supporting up to 6 channels	Two 12-bit SAR ADCs, up to 20 channels
Digital-to-Analog Converter (DAC)	Two 8-bit channels	Two 8-bit channels
Timer	Four 64-bit general-purpose timers, three watchdog timers	Four 64-bit general-purpose timers, three watchdog timers	2 54-bit general-purpose timers, 3 watchdog timers	4 54-bit general-purpose timers, 3 watchdog timers
Temperature Sensor		1	1	1
Touch Sensor	10	14		14
Hall sensor	1
General Purpose Input/Output (GPIO)	34	43	twenty two	45
Serial Peripheral Interface (SPI)	4	4	3	4
LCD Interface	1	1		1
Universal Asynchronous Receiver/Transmitter (UART)	3	twenty one	twenty one	3
I2C Interface	2	2	1	2
I2S Interface	2, configurable as 8/16/32/40/48-bit input and output channels	1, configurable as 8/16/24/32/48/64-bit input and output channels	1, configurable as 8/16/24/32-bit input and output channels	2, configurable as 8/16/24/32-bit input and output channels
Camera Interface	1	1		1
DMA	UART, SPI, I2S, SDIO slave, SD/MMC host, EMAC, BT and Wi-Fi all have dedicated DMA controllers	UART, SPI, AES, SHA, I2S and ADC controllers all have dedicated DMA controllers	General purpose DMA controller, 3 receive channels and 3 transmit channels	General purpose DMA controller, 5 receive channels and 5 transmit channels
Infrared Remote Control (RMT)	Support 8 channels	Supports 4 channels 1 , configurable as infrared transmitter and receiver	Support 4 channels 2 , dual channel infrared transmission and dual channel infrared reception	Supports 8 channels 1 , configurable as infrared transmitter and receiver
Pulse counter	8 channels	4 Channel 1		4 Channel 1
LED PWM	16 channels	8 Channel 1	6 Channel 2	8 Channel 1
MCPWM	2. Provide six PWM outputs			2. Provide six PWM outputs
USB OTG		1		1
TWAI controller (compatible with ISO 11898-1 protocol)	1	1	1	1
SD/SDIO/MMC Host Controllers	1			1
SDIO Slave Controller	1
Ethernet MAC interface	1
Ultra-low-power coprocessor (ULP)	ULP FSM	PicoRV32 core, 8 KB SRAM, ULP FSM		PicoRV32 core, 8 KB SRAM, ULP FSM
Assisted debugging			1
Safety Mechanism
Secure Boot		Faster and safer than ESP32	Faster and safer than ESP32	Faster and safer than ESP32
Flash Encryption		Supports PSRAM encryption, more secure than ESP32	More secure than ESP32	Supports PSRAM encryption, more secure than ESP32
OTP	1024 bits	4096 bits	4096 bits	4096 bits
AES	AES-128, AES-192, AES-256 (FIPS PUB 197)	AES-128, AES-192, AES-256 (FIPS PUB 197); supports DMA	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); supports DMA	SHA-1, SHA-224, SHA-256 (FIPS PUB 180-4); supports DMA	SHA-1, SHA-224, SHA-256, SHA-384, SHA-512, SHA-512/224, SHA-512/256, SHA-512/t (FIPS PUB 180-4); supports DMA
RSA	Up to 4096 bits	Up to 4096 bits	Up to 3072 bits	Up to 4096 bits
Random Number Generator (RNG)
HMAC
Digital Signature
XTS		XTS-AES-128, XTS-AES-256	XTS-AES-128	XTS-AES-128, XTS-AES-256
other
Deep-sleep power consumption (ultra-low power consumption sensor monitoring method)	100 μA (ADC operating at 1% duty cycle)	22 μA (when touch sensor operates at 1% duty cycle)	No such mode	TBD
Package size	QFN48 5*5, 6*6, different models have different	QFN56 7*7	QFN32 5*5	QFN56 7*7

wangerxian

ESP-S2, ESP-C3 and ESP-S3 were all released in 2020?

dcexpert

wangerxian posted on 2022-8-2 11:54 ESP-S2, ESP-C3 and ESP-S3 were all released in 2020?

Yes. The old version of ESP32-C3 hardware has some problems. I once bought an Axon module, but the USB didn't work.