ESP8266EX Datasheet
Version 4.4
Espressif Systems IOT Team
http://bbs.espressif.com/
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©
2015
Espressif Systems
ESP8266 Datasheet
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Copyright © 2015 Espressif Systems. All rights reserved.
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ESP8266 Datasheet
Table of Contents
1.
General Overview ..................................................................................................6
1.1.
1.2.
1.3.
1.4.
1.5.
Introduction..............................................................................................................6
Features ....................................................................................................................7
Parameters ...............................................................................................................7
Ultra Low Power Technology ..................................................................................9
Major Applications ..................................................................................................9
2.
Hardware Overview ............................................................................................11
2.1.
2.2.
2.3.
2.4.
2.5.
2.6.
2.6.1.
2.6.2.
2.7.
Pin Definitions ..........................................................................................................11
Electrical Characteristics ........................................................................................13
Power Consumption .............................................................................................13
Receiver Sensitivity ...............................................................................................14
MCU ........................................................................................................................15
Memory Organization ..........................................................................................15
Internal SRAM and ROM ......................................................................................15
External SPI Flash ..................................................................................................15
AHB and AHB Blocks ............................................................................................16
3.
Pins and Definitions ............................................................................................17
3.1.
3.1.1.
GPIO .......................................................................................................................17
General Purpose Input/Output Interface (GPIO) ..............................................17
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3.2.
3.3.
3.3.1.
3.3.2.
3.3.3.
3.4.
3.5.
3.6.
3.7.
3.8.
3.9.
3.10.
ESP8266 Datasheet
Secure Digital Input/Output Interface (SDIO) ...................................................18
Serial Peripheral Interface (SPI/HSPI) ..................................................................18
General SPI (Master/Slave) ..................................................................................18
SDIO / SPI (Slave) .................................................................................................19
HSPI (Master/Slave) ..............................................................................................19
Inter-integrated Circuit Interface (I2C) ...............................................................19
I2S ...........................................................................................................................20
Universal Asynchronous Receiver Transmitter (UART) .....................................20
Pulse-Width Modulation (PWM) ..........................................................................21
IR Remote Control .................................................................................................22
ADC (Analog-to-digital Converter) .....................................................................22
LED Light and Button............................................................................................24
4.
Firmware & Software Development Kit ...........................................................26
4.1.
Features ..................................................................................................................26
5.
6.
Power Management ............................................................................................27
Clock Management .............................................................................................28
6.1.
6.2.
High Frequency Clock ..........................................................................................28
External Reference Requirements.......................................................................29
7.
Radio .....................................................................................................................29
7.1.
7.2.
7.3.
Channel Frequencies ............................................................................................30
2.4 GHz Receiver ...................................................................................................30
2.4 GHz Transmitter ..............................................................................................30
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7.4.
ESP8266 Datasheet
Clock Generator ....................................................................................................30
8.
Appendix: QFN32 Package Size.......................................................................31
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