ESP32C3 datasheet(12/44 Pages) ESPRESSIF

Part #	ESP32C3

Description	UltraLowPower SoC with RISCV SingleCore CPU

PDF	44 Pages

Scroll/Zoom	100%

Manufacturer	ESPRESSIF [ESPRESSIF SYSTEMS (SHANGHAI) CO., LTD.]

Direct Link	https://www.espressif.com/

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12 / 44 page

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 RSP 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 4.

Figure 4: ESP32C3 Power Scheme

Notes on CHIP_EN:

Figure 5 shows the power-up and reset timing of ESP32-C3. Details about the parameters are listed in Table

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ESP32-C3 Series Datasheet v1.1

ESP32C3 Datasheet(PDF) 12 Page - ESPRESSIF SYSTEMS (SHANGHAI) CO., LTD.