1. ESP8266EX
1.1.
Overview
Espressif’s ESP8266EX delivers highly integrated Wi-Fi SoC solution to meet the continuous
demands for efficient power usage, compact design and reliable performance in the industry.
With the complete and self-contained Wi-Fi networking capabilities, It can perform as either a
standalone application or the slave to a host MCU. When ESP8266EX hosts the application, it
promptly boots up from the external flash. The integrated high-speed cache increases the
system performance and optimizes the system memory.
Also, ESP8266EX can be applied to any micro-controller design as a Wi-Fi adaptor through
SPI / SDIO or I2C / UART interfaces.
Besides the Wi-Fi functionalities, ESP8266EX also integrates an enhanced version of Tensilica’s
L106 Diamond series 32-bit processor and on-chip SRAM. It can be interfaced with external
sensors and other devices through the GPIOs, resulting in low development cost at early stage
and smallest footprints. Software Development Kit (SDK) provides sample codes for various
applications.
ESP8266EX integrates antenna switches, RF balun, power amplifier, low noise receive
amplifier, filters and power management modules. The compact design minimise the PCB size
and allows for minimal external circuitry.
ESP8266EX enables sophisticated features as follows:
•
Fast switching between sleep and wake-up mode for energy-efficiency purpose;
•
Adaptive radio biasing for low-power operation;
•
Advanced signal processing;
•
Spur cancellation;
•
Radio co-existence mechanisms for common cellular, Bluetooth, DDR, LVDS, LCD
interference mitigation.
Figure 1-1 shows the functional blocks of ESP8266EX.
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