Data Sheet
Table Of Contents
- Overview
- Wi-Fi Key Features
- Specifications
- Applications
- CPU, Memory, and Flash
- Clock
- Radio
- Wi-Fi
- Power Management
- General Purpose Input/Output Interface (GPIO)
- Secure Digital Input/Output Interface (SDIO)
- Serial Peripheral Interface (SPI/HSPI)
- I2C Interface
- I2S Interface
- Universal Asynchronous Receiver Transmitter (UART)
- Pulse-Width Modulation (PWM)
- IR Remote Control
- ADC (Analog-to-Digital Converter)
- Electrical Characteristics
- RF Power Consumption
- Wi-Fi Radio Characteristics
- Must-Read Documents
- Must-Have Resources
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3. Functional Description
3.4.1. Wi-Fi Radio and Baseband
The ESP8266EX Wi-Fi Radio and Baseband support the following features:
• 802.11 b and 802.11 g
•
802.11 n MCS0-7 in 20 MHz bandwidth
• 802.11 n 0.4 μs guard-interval
• up to 72.2 Mbps of data rate
• Receiving STBC 2 x 1
•
Up to 20.5 dBm of transmitting power
• Adjustable transmitting power
3.4.2. Wi-Fi MAC
The ESP8266EX Wi-Fi MAC applies low-level protocol functions automatically, as follows:
• 2 × virtual Wi-Fi interfaces
•
Infrastructure BSS Station mode/SoftAP mode/Promiscuous mode
• Request To Send (RTS), Clear To Send (CTS) and Immediate Block ACK
• Defragmentation
•
CCMP (CBC-MAC, counter mode), TKIP (MIC, RC4), WEP (RC4) and CRC
• Automatic beacon monitoring (hardware TSF)
• Dual and single antenna Bluetooth co-existence support with optional simultaneous
receive (Wi-Fi/Bluetooth) capability
3.5. Power Management
ESP8266EX is designed with advanced power management technologies and intended for
mobile devices, wearable electronics and the Internet of Things applications.
The low-power architecture operates in the following modes:
• Active mode: The chip radio is powered on. The chip can receive, transmit, or listen.
•
Modem-sleep mode: The CPU is operational. The Wi-Fi and radio are disabled.
• Light-sleep mode: The CPU and all peripherals are paused. Any wake-up events
(MAC, host, RTC timer, or external interrupts) will wake up the chip.
• Deep-sleep mode: Only the RTC is operational and all other part of the chip are
powered off.!
Espressif
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2020.10