ESP32C3 datasheet(16/44 Pages) ESPRESSIF

16 / 44 page

Functional Description

3. Functional Description

This chapter describes the functions of ESP32-C3.

3.1 CPU and Memory

3.1.1 CPU

ESP32-C3 has a low-power 32-bit RISC-V single-core microprocessor with the following features:

• four-stage pipeline that supports a clock frequency of up to 160 MHz

• RV32IMC ISA

• 32-bit multiplier and 32-bit divider

• up to 32 vectored interrupts at seven priority levels

• up to 8 hardware breakpoints/watchpoints

• up to 16 PMP regions

• JTAG for debugging

3.1.2 Internal Memory

ESP32-C3’s internal memory includes:

•

384 KB of ROM: for booting and core functions.

•

400 KB of onchip SRAM: for data and instructions, running at a configurable frequency of up to 160

MHz. Of the 400 KB SRAM, 16 KB is configured for cache.

•

RTC FAST memory: 8 KB of SRAM that can be accessed by the main CPU. It can retain data in

Deep-sleep mode.

•

4 Kbit of eFuse: 1792 bits are reserved for your data, such as encryption key and device ID.

•

Embedded flash : See details in Chapter 1 ESP32-C3 Series Comparison.

3.1.3 External Flash

ESP32-C3 supports SPI, Dual SPI, Quad SPI, and QPI interfaces that allow connection to multiple external

flash.

CPU’s instruction memory space and read-only data memory space can map into external flash of ESP32-C3,

whose size can be 16 MB at most. ESP32-C3 supports hardware encryption/decryption based on XTS-AES to

protect developers’ programs and data in flash.

Through high-speed caches, ESP32-C3 can support at a time up to:

• 8 MB of instruction memory space which can map into flash as individual blocks of 64 KB. 8-bit, 16-bit and

32-bit reads are supported.

• 8 MB of data memory space which can map into flash as individual blocks of 64 KB. 8-bit, 16-bit and

32-bit reads are supported.

Note:

After ESP32-C3 is initialized, software can customize the mapping of external flash into the CPU address space.

Espressif Systems

Submit Documentation Feedback

ESP32-C3 Series Datasheet v1.1

ESP32C3 Datasheet(PDF) 16 Page - ESPRESSIF SYSTEMS (SHANGHAI) CO., LTD.

ESP32C3 Datasheet(HTML) 16 Page - ESPRESSIF SYSTEMS (SHANGHAI) CO., LTD.

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44

Datasheet Download

Link URL