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
2 Pin Definition
2.3 Power Scheme
ESP32-C3 has four input power pins:
• VDDA1
• VDDA2
• VDD3P3_RTC
• VDD3P3_CPU
And one input/output power pin:
• VDD_SPI
VDDA1 and VDDA2 are the input power supply for the analog domain.
When working as an output power supply, VDD_SPI can be powered by VDD3P3_CPU via R
SP I
(nominal 3.3 V).
VDD_SPI can be powered off via software to minimize the current leakage of flash in Deep-sleep mode.
RTC IO is powered from VDD3P3_RTC.
The RTC domain is powered from Low Power Voltage Regulator, which is powered from VDD3P3_RTC.
The Digital System domain is powered from Digital System Voltage Regulator, which is powered from
VDD3P3_CPU and VDD3P3_RTC at the same time.
Digital IO is powered from VDD3P3_CPU.
The power scheme diagram is shown in Figure 5.
Figure 5: ESP32C3 Power Scheme
Notes on CHIP_EN:
Figure 6 shows the power-up and reset timing of ESP32-C3. Details about the parameters are listed in Table
Espressif Systems 13
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ESP32-C3 Series Datasheet v1.2