Datasheet
Table Of Contents
- Product Overview
- 1 ESP32-C3 Series Comparison
- 2 Pin Definition
- 3 Functional Description
- 3.1 CPU and Memory
- 3.2 System Clocks
- 3.3 Analog Peripherals
- 3.4 Digital Peripherals
- 3.4.1 General Purpose Input / Output Interface (GPIO)
- 3.4.2 Serial Peripheral Interface (SPI)
- 3.4.3 Universal Asynchronous Receiver Transmitter (UART)
- 3.4.4 I2C Interface
- 3.4.5 I2S Interface
- 3.4.6 Remote Control Peripheral
- 3.4.7 LED PWM Controller
- 3.4.8 General DMA Controller
- 3.4.9 USB Serial/JTAG Controller
- 3.4.10 TWAI® Controller
- 3.5 Radio and Wi-Fi
- 3.6 Bluetooth LE
- 3.7 Low Power Management
- 3.8 Timers
- 3.9 Cryptographic Hardware Accelerators
- 3.10 Physical Security Features
- 3.11 Peripheral Pin Configurations
- 4 Electrical Characteristics
- 5 Package Information
- 6 Related Documentation and Resources
- Revision History
3 Functional Description
support the faster 480 Mbit/s high-speed transfer mode)
• programming embedded/external flash
• CPU debugging with compact JTAG instructions
• a full-speed USB PHY integrated in the chip
3.4.10 TWAI
®
Controller
ESP32-C3 has a TWAI
®
controller with the following features:
• compatible with ISO 11898-1 protocol (CAN Specification 2.0)
• standard frame format (11-bit ID) and extended frame format (29-bit ID)
• bit rates from 1 Kbit/s to 1 Mbit/s
• multiple modes of operation: Normal, Listen Only, and Self-Test (no acknowledgment required)
• 64-byte receive FIFO
• acceptance filter (single and dual filter modes)
• error detection and handling: error counters, configurable error interrupt threshold, error code capture,
arbitration lost capture
3.5 Radio and WiFi
ESP32-C3 radio consists of the following blocks:
• 2.4 GHz receiver
• 2.4 GHz transmitter
• bias and regulators
• balun and transmit-receive switch
• clock generator
3.5.1 2.4 GHz Receiver
The 2.4 GHz receiver demodulates the 2.4 GHz RF signal to quadrature baseband signals and converts them to
the digital domain with two high-resolution, high-speed ADCs. To adapt to varying signal channel conditions,
ESP32-C3 integrates RF filters, Automatic Gain Control (AGC), DC offset cancelation circuits, and baseband
filters.
3.5.2 2.4 GHz Transmitter
The 2.4 GHz transmitter modulates the quadrature baseband signals to the 2.4 GHz RF signal, and drives the
antenna with a high-powered CMOS power amplifier. The use of digital calibration further improves the linearity of
the power amplifier.
Additional calibrations are integrated to cancel any radio imperfections, such as:
• carrier leakage
• I/Q amplitude/phase matching
• baseband nonlinearities
• RF nonlinearities
Espressif Systems 24
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ESP32-C3 Series Datasheet v1.2