Specifications

1. OUTLINE
C3 is the smallest ESP32 system board launched by M5Stack. It focuses
on cost-effectiveness and simplification. It embeds an ESP32-C3 IoT control on a small
and exquisite PCB board as small as a stamp (STAMP). Provide 13 IO expansion pins
and a programmable RGB LED, combined with ESP32 internal interface resources
(UART, I2C, SPI, etc.), can expand various peripheral sensors. It can be embedded in all
kinds of IoT devices as the control core.
1.1. ESP32 C3
• A complete Wi-Fi subsystem that complies with IEEE 802.11b/g/n protocol and supports
Station mode, SoftAP mode, SoftAP + Station mode, and promiscuous mode
• A Bluetooth LE subsystem that supports features of Bluetooth 5 and Bluetooth mesh
• State-of-the-art power and RF performance
• 32-bit RISC-V single-core processor with a four-stage pipeline that operates at up to 160
MHz
• 400 KB of SRAM (16 KB for cache) and 384 KB of ROM on the chip, and SPI, Dual SPI, Quad
SPI, and QPI interfaces that allow connection to external flash
• Reliable security features ensured by
1. Cryptographic hardware accelerators that support AES-128/256, Hash, RSA, HMAC,
digital signature and secure boot
2. Random number generator
3. Permission control on accessing internal memory, external memory, and peripherals –
External memory encryption and decryption
• Rich set of peripheral interfaces and GPIOs, ideal for various scenarios and complex
applications.