ESP-WROOM-02 Datasheet Version 2.
About This Guide This document provides introduction to the specifications of ESP-WROOM-02 hardware. Release Notes Date Version Release notes 2015.12 V0.5 First release. 2016.01 V0.6 Updated Section 3.2.2. 2016.02 V0.7 2016.04 V0.8 Updated the flash size and PAD (bottom) size. 2016.06 V0.9 Updated the flash size. 2016.06 V1.0 2016.08 V1.1 2016.11 V1.2 2016.11 V2.0 2016.12 V2.1 2017.02 V2.2 2017.04 V2.3 • Added Appendix—Notices. • Updated Chapter 1.
Documentation Change Notification Espressif provides email notifications to keep customers updated on changes to technical documentation. Please subscribe here. Certification Download certificates for Espressif products from here.
Table of Contents 1. Overview ................................................................................................................................ 1 2. Pin Description ......................................................................................................................3 3. Functional Description ..........................................................................................................5 3.1. MCU .....................................................................
1. Overview # 1. Overview Espressif provides the SMD module—ESP-WROOM-02 that integrates ESP8266EX. The module has been adjusted to get the best RF performance. We recommend using ESPWROOM-02 for tests or for further development. 📖 Note: For more information on ESP8266EX, please refer to ESP8266EX Datasheet. The module size is (18±0.2) mm x (20±0.2) mm x (3±0.15) mm. The type of flash used on this module is an SPI flash with a package size of SOP 8-150 mil. The gain of the on-board PCB antenna is 2 dBi.
1. Overview # Categories Software Items Specifications Storage temperature -40°C ~ 85°C Package size (18±0.2) mm x (20±0.2) mm x (3±0.
2. Pin Description # 2. Pin Description Figure 2-1 shows the pin distribution of the ESP-WROOM-02. PCB ANTENNA 1 3V3 GND 18 2 EN IO16 17 3 IO14 TOUT 16 4 IO12 RST 15 5 IO13 IO5 14 6 IO15 GND 13 7 IO2 TXD 12 8 IO0 RXD 11 9 GND IO4 10 19 GND # Figure 2-1. ESP-WROOM-02 Pin Layout ESP-WROOM-02 has 18 pins. Please see the pin definitions in Table 2-1. Table 2-1. ESP-WROOM-02 Pin Definitions No. Pin Name Functional Description 3.
2. Pin Description # No. Pin Name 6 IO15 7 IO2 Functional Description GPIO15; MTDO; HSPICS; UART0_RTS Pull down. GPIO2; UART1_TXD Floating (internal pull-up) or pull up. GPIO0 8 IO0 • UART download: pull down. • Flash boot: floating or pull up. Espressif 9 GND GND 10 IO4 GPIO4 11 RXD 12 TXD 13 GND GND 14 IO5 GPIO5 15 RST Reset 16 TOUT It can be used to test the power-supply voltage of VDD3P3 (Pin3 and Pin4) and the input power voltage of TOUT (Pin6).
3. Functional Description # 3. Functional Description 3.1. MCU ESP8266EX integrates the Tensilica L106 32-bit microcontroller (MCU) and ultra-low-power 16-bit RSIC. The CPU clock speed is 80 MHz and can reach a maximum value of 160 MHz. The system can readily run a Real-Time Operating System (RTOS). Currently, the WiFi stack only takes up 20% of CPU time. The remaining CPU time (80% of total MIPS) can be used for user applications.
3. Functional Description # 3.3. Crystal Oscillator ESP-WROOM-02 uses a 26-MHz crystal oscillator. The accuracy of the crystal oscillator should be ±10 PPM. When using the download tool, please select the right type of crystal oscillator. In circuit design, capacitors C1 and C2 which connect to the earth are added to the input and output terminals of the crystal oscillator respectively.
3. Functional Description # Interface Pin Functional Description I2S input: IO12 (I2SI_DATA) ; IO13 (I2SI_BCK ); I2S IO14 (I2SI_WS); Collects, processes and transmits audio data. I2S output: IO15 (I2SO_BCK ); IO3 (I2SO_DATA); IO2 (I2SO_WS ). Espressif # /#17 7 2017.
4. Electrical Characteristics # 4. Electrical Characteristics 📖 Note: Unless otherwise specified, measurements are based on VDD = 3.3V, TA = 25°C. 4.1. Electrical Characteristics Table 4-1. Electrical Characteristics Parameter Symbol Min Typ Max Unit Storage temperatue - -40 Normal 85 ℃ Operating temperature - -40 20 85 ℃ Maximum soldering temperature (Condition: IPC/JEDEC J-STD-020) - - - 260 ℃ Supply voltage VDD 2.7 3.3 3.6 V Input logic level low VIL -0.3 - 0.
4. Electrical Characteristics # Description Min Typ Max Unit 6 Mbps (1/2 BPSK) - -93 - dBm 54 Mbps (3/4 64-QAM) - -75 - dBm HT20, MCS7 (65 Mbps, 72.2 Mbps) - -72 - dBm Adjacent channel rejection OFDM, 6 Mbps - 37 - dB OFDM, 54 Mbps - 21 - dB HT20, MCS0 - 37 - dB HT20, MCS7 - 20 - dB 4.3. Power Consumption The following power consumption data were obtained from the tests with a 3.3V power supply and a voltage stabilizer, in 25°C ambient temperature.
4. Electrical Characteristics # 📖 Notes: ① Modem-sleep is used when such applications as PWM or I2S require the CPU to be working. In cases where Wi-Fi connectivity is maintained and data transmission is not required, the Wi-Fi Modem circuit can be shut down to save power, according to 802.11 standards (such as U-APSD). For example, in DTIM3, when ESP8266EX sleeps for 300 ms and wakes up for 3 ms to receive Beacon packages from AP, the overall average current consumption is about 15 mA.
4. Electrical Characteristics # 4.5. Electrostatic Discharge Table 4-4. Electrostatic Discharge Parameters Name Symbol Reference Electrostatic Discharge VESD (HBM) Temperature: 23 ± 5℃ VESD (Charged - Device Model) (CDM) Temperature: 23 ± 5℃ (Human - Body Model) Electrostatic Discharge Espressif Based on ANSI/ESDA/JEDEC JS - 001 - 2014 Based on JEDEC EIA/JESD22 - C101F # /# 17 11 Level Max 2 2000 Unit V C2 500 2017.
5. Schematics # VDD33 VDD33 ANT1 1 2 WIFI_ANT GND C5 10uF GND GND GND L2 1.5nH C4 8.2pF L1 2.4pF GND C6 1uF C3 0.
5. Schematics # VDD33 VDD33 C1 10uF GND C3 GND R2 0.1uF 10K GND GND GND U1 EN IO14 IO12 IO13 IO15 IO2 IO0 1 2 3 4 5 6 7 8 9 3V3 EN IO14 IO12 IO13 IO15 IO2 IO0 GND1 P_GND GND3 IO16 TOUT RST IO5 GND2 TXD RXD IO4 19 18 17 16 15 14 13 12 11 10 UART DOWNLOAD J1 IO16 ADC RST IO5 3 2 1 C2 0.1uF R1 10K TXD RXD IO4 GND 1 2 ESP_WROOM_02 J2 ! BOOT OPTION GND Figure 5-2.
6. Dimensions # 6. Dimensions 18.0±0.2 2.9±0.15 18.0±0.2 6.0±0.2 1.5±0.1 12.0±0.1 0.9 4.0±0.1 4.0±0.1 20.0±0.2 0.85 4.5±0.2 1.5±0.1 12.0±0.1 0.9 1.5±0.1 12.0±0.1 0.9 15.65±0.1 1 0. ± 1.0 12.25±0.1 1.5±0.1 12.0±0.1 0.9 20.0±0.2 6.9 0.9 0.9±0.1 Figure 6-1. Dimensions of ESP-WROOM-02 Espressif # /# 17 14 2017.
Appendix A # A. Appendix—Learning Resources A.1. Must-Read Documents • ESP8266 Quick Start Guide Description: This document is a quick user guide to getting started with ESP8266. It includes an introduction to the ESP-LAUNCHER, how to download firmware on to the board and run it, how to compile the AT application, structure and the debugging method of RTOS SDK. Basic documentation and other related resources for the ESP8266 are also provided.
Appendix A # A.2. Must-Have Resources • ESP8266 SDKs Description: This website page provides links to the latest version of ESP8266 SDK and the older ones. • ESP8266 Tools Description: This website page provides links to the ESP8266 flash download tools and ESP8266 performance evaluation tools. • ESP8266 App • ESP8266 Certification and Test Guide • ESP8266 BBS • ESP8266 Resources Espressif # /# 17 16 2017.
Disclaimer and Copyright Notice Information in this document, including URL references, is subject to change without notice. THIS DOCUMENT IS PROVIDED AS IS WITH NO WARRANTIES WHATSOEVER, INCLUDING ANY WARRANTY OF MERCHANTABILITY, NON-INFRINGEMENT, FITNESS FOR ANY PARTICULAR PURPOSE, OR ANY WARRANTY OTHERWISE ARISING OUT OF ANY PROPOSAL, SPECIFICATION OR SAMPLE. All liability, including liability for infringement of any proprietary rights, relating to use of information in this document is disclaimed.
