Updated Section 1.1 General Purpose Input/Output Interface (GPIO).
* Updated Section 1.3 Serial Peripheral Interface (SPI/ HSPI);
* Added documentation feedback .

application demos and other information is included. The document is structured as below. Chapter Title Subject Chapter 1 Overview Overall introduction to the interfaces. Chapter 2 Chapter 3 Chapter 4 Chapter 5 Chapter 6 Chapter 7 Chapter 8 G.

ESP8266EX

ESP8285

ESP80-0522T

ESP80-0533T

ESP8089

ESP-01

ESP-07

ESP-12E

ESP-12F

ESP-32S

ESP-PSRAM16H

eSP020A

eSP040A