Espressif released ESP32-S2 SoC Chipset
Shanghai Lesin Technology ESpressif recently released the latest product of ESP32 family ESP32-S2. The biggest highlight of ESP32-S2 is the support of multiple GPIO, the number of GPIO is 43, while the previous version, namely ESP32-S1, has the maximum of 34 GPIO. The ESP32-S1 is a Xtensa 32-bit LX7 single core processor with a 240 MHz primary frequency, while the ESP32-S1 is a Xtensa 32-bit LX6 single/dual core processor with a 240 MHz primary frequency.
ESP32-S2 features low power 2.4GHz Wi-Fi applications, right! There's only WiFi, and the band is still 2.4GHz, and Bluetooth has been axed. Of course, if there's only 2.4GHz Wi-Fi, we know we already have ESP8266, so why make ESP32-S2?
The ESP32-S2 is an upgrade to the ESP8266, which has a built-in Tensilica L106 32-bit RISC processor with a clock speed of up to 160 MHz. However, the performance of ESP32-S2 is much higher than that of ESP8266.
ESP32-S2 has an on-chip memory resource of 320 KB SRAM, 128 KB ROM, 16 KB RTC memory, and supports external SPIRAM (up to 128 MB) and up to 1 GB of external Flash. Compared to the ESP8266, the storage resources are much looser and can support more complex applications such as the Internet of Things, wearables and smart home.
The main features of ESP32-S2 are listed below:
The CPU and memory
Xtensa® 32-Bit LX7 Single Core Processor
7-level pipeline architecture
Clock frequency up to 240 MHz
Ultra-low power coprocessor
320 KB SRAM, 128 KB ROM, 16 KB RTC memory
Support for External Spiram (128 MB total)
Supports up to 1 GB of external Flash
Separate instruction and data caches
Support IEEE 802.11b /g/n protocol
1 x 1 send and receive
HT40 support, data rate up to 150 Mbps
Support TCP/IP networking, ESP-Mesh networking and TLS 1.0, TLS 1.1, 2 and other Wi-Fi network protocols
Support TOF ranging for normal Wi-Fi packets
43 GPIO port
14 capacitive sensing IO
Support SPI, I2C, I2S, UART, ADC/DAC and PWM and other standard peripherals
Support LCD interface (8-bit parallel port RGB, 8080, 6800 interface)
Support 8-/16-bit DVP image sensor interface, the highest clock frequency support to 40 MHz
Support full speed USB OTG
Trusted application boot based on RSA-3072
Flash encryption technology based on AES256-XTS protects sensitive data at rest
4096-bit EFUSE storage, of which 2048 bits are available for applications
Support for digital signature peripherals that can be used for secure storage of private keys and generation of RSA signatures
The optimal power consumption
The ESP32-S2 supports fine-resolution power control by selecting clock frequency, duty cycle, Wi-Fi operation mode, and individual power control for internal components.
When Wi-Fi is enabled, the chip automatically turns the RF transceiver on and off only when needed, reducing the overall power consumption of the system.
At 1% duty cycle current consumption, the no-load mode of the ultra-low power coprocessor is 5 μA and 7 μA, respectively.
Improved power consumption for Wi-Fi connectivity and MCU idle mode.
ESP32-S2 supports LEXIN's software development framework ESP-IDF, which is a mature, production-ready platform. A common cloud connection agent and common product features can significantly reduce time to market.
ESP32-S2 provides a universal Wi-Fi connectivity solution for a variety of applications from consumer to industrial use cases. In addition, its computing power and memory scalability also make it suitable for simple ML-on-edge applications.
ESP32-S2 can support a large number of applications, but the main examples are as follows:
The solutions range from the simplest smart lighting, smart door locks and smart sockets to video streaming devices such as white goods, kitchen appliances, OTT devices and security cameras.
Support Mesh network protocol, can be applied to large commercial lighting and smart home network solutions.
It can effectively interact with a variety of sensors to meet the needs of various smart home scenarios.
Wi-Fi connected sensors, Wi-Fi connected toys, wearable devices and health management devices
The 7 mm Ae 7 mm QFN package is suitable for wearable devices
Ultra-low power operation, less than 5 uA in sleep mode, can be applied to battery-powered devices or devices requiring long periods of standby
QSPI/OPI supports multiple Flash /SRAM chips with flexible configuration of non-volatile and volatile data storage
Industrial automation equipment
Industrial automation equipment applications include wireless control and robotics, intelligent lighting, and HVAC control equipment to ensure high quality technology development and product life cycle.
With excellent radio frequency performance and safety characteristics, can meet the electronic control equipment for reliability, safety and high efficiency of the high standards.
Retail and catering applications
POS machines and service robots
With advanced security performance, can effectively protect the chip and flash sensitive data
Adopt SFF miniaturization design
With 14 very sensitive touch sensors and an LCD interface, the ESP32-S2 is targeted for low-cost, securely connected HMI devices such as POS terminals