ESP8266EX
Datasheet Version 1.0 Copyright © 2016 About This Guide
This document introduces the specifications of ESP8266EX, including the following topics.
Chapter Title Subject Chapter 1 Overview Provides overview introduction to ESP82 serials, including features,
protocols, technical parameters and applications. Chapter 2 Pin Definitions Provides introduction to pin layout and the relevant description. Chapter 3 Functional Description Describes major functional modules and protocols applied on
ESP8266EX including CPU, flash and memory, clock, radio, Wi-Fi,
and low-power management. Chapter 4 Peripheral Interface Provides descriptions of peripheral interfaces integrated on
ESP8266EX. Chapter 5 Electrical Specifications Lists the electrical data of ESP8266EX. Chapter 6 Package Information Illustrates the package details for ESP8266EX. Appendix Pin List Provides detailed pin information including digital die pin list, buffer
sheet, register list, and strapping pin list. Release Notes
Date Version Release Notes 2015.12 V4.6 Chapter 3 updated. 2016.02 V4.7 Section 3.6 updated. 2016.03 V4.8 Section 4.1 updated. 2016.04 V4.9 Chapter 1 updated. Table of Contents
1. Overview .1 1.1. Wi-Fi Protocols .1 1.2. Main Technical Specifications . 3 1.3. Applications .3 2. Pin Definitions .5 3. Functional Description . 7 3.1. CPU, Memory, and Flash .7 3.1.1. CPU .7 3.1.2. Memory . 7 3.1.3. External Flash .8 3.2. AHB and AHB Blocks .8 3.3. Clock . 8 3.3.1. High Frequency Clock .8 3.3.2. External Clock Requirements . 9 3.4. Radio . 9 3.4.1. Channel Frequencies . 9 3.4.2. 2.4 GHz Receiver . 10 3.4.3. 2.4 GHz Transmitter . 10 3.4.4. Clock Generator . 10 3.5. Wi-Fi .10 3.6. Power Management . 11 4. Peripheral Interface .13 4.1. General Purpose Input/Output Interface (GPIO) .13 4.2. Secure Digital Input/Output Interface (SDIO) .13 4.3. Serial Peripheral Interface (SPI/HSPI) .13 4.3.1. General SPI (Master/Slave) . 14 4.3.2. HSPI (Slave) .14 4.4. I2C Interface .14 4.5. I2S Interface .15 4.6. Universal Asynchronous Receiver Transmitter (UART) .15 4.7. Pulse-Width Modulation (PWM) .16 4.8. IR Remote Control . 16 4.9. ADC (Analog-to-Digital Converter) .17 4.10. LED Light and Button .18 5. Electrical Specifications .19 5.1. Electrical Characteristics .19 5.2. Power Consumption . 19 5.3. Wi-Fi Radio Characteristics . 20 6. Package Information . 21 I. Appendix .22 1. Overview
! 1. Overview
Espressif's ESP8266EX delivers highly integrated Wi-Fi SoC solution to meet users'
continuous demands for efficient power usage, compact design and reliable performance
in the Internet of Things ind …