Datasheet

About This Guide
This document introduces the specifications of ESP8285, including the following topics:
Release Notes
Chapter
Title
Subject
Chapter 1
Overview
Provides an overview of ESP8285, including features, protocols,
technical parameters and applications.
Chapter 2
Pin Definitions
Provides the pin layout and the relevant description.
Chapter 3
Functional Description
Describes major functional modules integrated on ESP8285 including
CPU, flash and memory, clock, radio, Wi-Fi, and low-power
management.
Chapter 4
Peripheral Interface
Provides descriptions of peripheral interfaces integrated on ESP8285.
Chapter 5
Electrical Specifications
Lists the electrical data of ESP8285.
Chapter 6
Package Information
Illustrates the package details for ESP8285.
Appendix A
Pin List
Provides detailed pin information including digital die pin list, buffer
sheet, register list, and strapping pin list.
Appendix B
Learning Resources
Introduction to ESP8285-related must-read documents and must-
have resources.
Date
Version
Release notes
2016.04
V1.0
First release.
2016.11
V1.1
Added Appendix B “Learning Resources”.
2017.01
V1.2
• Changed the power consumption during Deep-sleep from 10 μA to 20 μA in
Table 5-2.
• Changed the crystal frequency range from “26 MHz to 52 MHz” to “24 MHz
to 52 MHz” in Section 3.3.
• Changed the minimum working voltage from 3.0V to 2.5V.
2017.05
V1.3
Changed the chip's input impedance of 50Ω to output impedance of 39+j6 Ω.