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- ZH
- Last added
- 2026-09-29
Featured Espressif manuals
Espressif ESP8266 Technical Reference Manual
This reference guide provides a complete description of the ESP8266EX system‑on‑chip, covering each peripheral interface, its registers, configuration options and example code. It is organized into chapters for GPIO, SDIO, SPI (including HSPI and overlap modes), I2C, I2S, UART, PWM, IR and the Sniffer application.
The document also includes appendices with full register tables for GPIO, SPI, UART and timers, as well as version history and copyright information from Espressif. This manual is written in Chinese.
Covers: Overview · GPIO · SDIO · SPI · SPI Overlap · SPI Transparent (single line)
Latest Espressif manuals
Espressif ESP8266 Technical Reference Manual
Programming Manual 122 pages · 4.4 MB · ZHThe ESP8266 Technical Reference Manual details all GPIO, SDIO, SPI, I2C, I2S, UART, PWM and IR interfaces with register maps and API usage.
Which document do I need?
Programming Manual
Instruction set, parameters and examples for configuring or programming the device.
Questions answered in Espressif manuals
How many GPIO pins does the ESP8266 have?
The ESP8266EX provides 17 GPIO pins that can be configured for various functions.
What SDIO speeds are supported by the ESP8266?
It supports 4‑bit SDIO at 25 MHz (v1.1) and up to 50 MHz (v2.0).