Espressif Announces the 
Release of ESP32-S2 Secure Wi-Fi MCU

Espressif announces the release of the 
ESP32-S2 Secure Wi-Fi MCU, which is a highly integrated, low-power, 2.4 GHz Wi-Fi Microcontroller SoC supporting Wi-Fi HT40 and 43 GPIOs. Based on Xtensa® single-core 32-bit LX7 processor, ESP32-S2 can be clocked at up to 240 MHz.

ESP32-S2 is a highly integrated, low-power, 2.4 GHz Wi-Fi Microcontroller SoC supporting Wi-Fi HT40 and 43 GPIOs. Based on Xtensa® single-core 32-bit LX7 processor, it can be clocked at up to 240 MHz.

Features of ESP32-S2 Secure Wi-Fi MCU

CPU and Memory

• Xtensa® single-core 32-bit LX7 microcontroller
• 7-stage pipeline
• Clock frequency of up to 240 MHz
• Ultra-low-power co-processor
• 320 kB SRAM, 128 kB ROM, 16 KB RTC memory
• External SPIRAM (128 MB total) support
• Up to 1 GB of external flash support
• Separate instruction and data cache

Connectivity

• Wi-Fi 802.11 b/g/n
• 1×1 transmit and receive
• HT40 support with data rate up to 150 Mbps
• Support for TCP/IP networking, ESP-MESH networking, TLS 1.0, 1.1 and 1.2 and other networking protocols over Wi-Fi
• Support Time-of-Flight (TOF) measurements with normal Wi-Fi packets

IO Peripherals

• 43 programmable GPIOs
• 14 capacitive touch sensing IOs
• Standard peripherals including SPI, I2C, I2S, UART, ADC/DAC and PWM
• LCD (8-bit parallel RGB/8080/6800) interface and also support for 16/24-bit parallel
• Camera interface supports 8 or 16-bit DVP image sensor, with clock frequency of up to 40 MHz
• Full speed USB OTG support

Security

• RSA-3072-based trusted application boot
• AES256-XTS-based flash encryption to protect sensitive data at rest
• 4096-bit eFUSE memory with 2048 bits available for application
• Digital signature peripheral for secure storage of private keys and generation of RSA signatures

Optimal Power Consumption

ESP32-S2 supports fine resolution power control through a selection of clock frequency, duty cycle, Wi-Fi operating modes and individual power control of its internal components.

• When Wi-Fi is enabled, the chip automatically powers on or off the RF transceiver only when needed, thereby reducing the overall power consumption of the system.
• ULP co-processor with less than 5 uA idle mode and 24 uA at 1% duty-cycle current consumption. Improved Wi-Fi-connected and MCU-idle-mode power consumption.

Software

ESP32-S2 supports Espressif’s software development framework (ESP-IDF), which is a mature and production-ready platform, already used by millions of devices deployed in the field. Availability of common cloud connectivity agents and common product features shortens the time to market.

Applications

ESP32-S2 offers a universal Wi-Fi connectivity solution for a variety of applications, ranging from consumer to industrial use-cases. Furthermore, the computing power and memory expandability also makes it a suitable solution for simple ML-on-edge applications.

While it can support a large number of use-cases, the main target application use-cases are listed below:

Smart-Home Connectivity

Ranges from simple solutions like light bulbs, smart door-locks, smart sockets to white goods and kitchen appliances, over-the-top (OTT) devices and video streaming devices like security cameras

• Supports Mesh Network, which can be applied to large-scale commercial lighting and smart-home network solutions.
• Allows efficient interfacing with a wide range of sensors, which is suitable for the needs of different smart-home scenarios.

Battery-operated devices

Connected Wi-Fi sensors, Wi-Fi enabled toys, wearable and healthcare devices

• Small 7 mm ⨉ 7 mm QFN package, which is ideal for wearable devices
• Low power consumption, in hibernation mode, of less than 5 uA enables application in battery-operated devices or long standby-time devices
• QSPI/OPI supports multiple flash/SRAM chips for flexible configuration of NVM and volatile data storage

Industrial automation

Industrial automation includes wireless control and robotics, smart lighting, HVAC control, which can ensure high-quality technology development and a long life-cycle for products.

• With its high RF performance and security features, it can meet strict requirements and high standards of reliability and efficiency for electronic control.

Retail & Catering Applications 

POS machines and service robots

• Advanced security features enable the protection of sensitive data on the chip and the flash device
• Small form factor
• With 14 highly sensitive touch sensors and an LCD interface, ESP32-S2 targets low-cost securely connected HMI devices, such as POS machines

Engineering Samples of ESP32-S2 beta will be available in June.

For more information, please contact Espressif Official Website.

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