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PDF ESP8266EX Data sheet ( Hoja de datos )
| Número de pieza | ESP8266EX | |
| Descripción | high integration wireless SOCs | |
| Fabricantes | Espressif Systems | |
| Logotipo |  |
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ESP8266EX
Datasheet
Version 5.1
Copyright © 2016
1 page  
1. Overview
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1. Overview
Espressif’s ESP8266EX delivers highly integrated Wi-Fi SoC solution to meet users’
continuous demands for efficient power usage, compact design and reliable performance
in the Internet of Things industry.
With the complete and self-contained Wi-Fi networking capabilities, ESP8266EX can
perform either as a standalone application or as the slave to a host MCU. When
ESP8266EX hosts the application, it promptly boots up from the flash. The integrated high-
speed cache helps to increase the system performance and optimize 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.
ESP8266EX integrates antenna switches, RF balun, power amplifier, low noise receive
amplifier, filters and power management modules. The compact design minimizes the PCB
size and requires minimal external circuitries.
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. Software Development Kit
(SDK) provides sample codes for various applications.
Espressif Systems’ Smart Connectivity Platform (ESCP) enables sophisticated features
including fast switch between sleep and wakeup mode for energy-efficient purpose,
adaptive radio biasing for low-power operation, advance signal processing, spur
cancellation and radio co-existence mechanisms for common cellular, Bluetooth, DDR,
LVDS, LCD interference mitigation.
1.1. Wi-Fi Protocols
• 802.11 b/g/n/e/i support.
• Wi-Fi Direct (P2P) support.
• P2P Discovery, P2P GO (Group Owner) mode, GC(Group Client) mode and P2P Power
Management.
• Infrastructure BSS Station mode / P2P mode / SoftAP mode support.
• Hardware accelerators for CCMP (CBC-MAC, counter mode), TKIP (MIC, RC4), WAPI
(SMS4), WEP (RC4), CRC.
• WPA/WPA2 PSK, and WPS driver.
• Additional 802.11i security features such as pre-authentication, and TSN.
• Open Interface for various upper layer authentication schemes over EAP such as TLS,
PEAP, LEAP, SIM, AKA, or customer specific.
• 802.11n support (2.4 GHz).
• Supports MIMO 1×1 and 2×1, STBC, A-MPDU and A-MSDU frame aggregation and
0.4μs guard interval.
Espressif
$1/$25
2016.11
5 Page 
3. Functional Description
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3. Functional Description
The functional diagram of ESP8266EX is shown as in Figure 3-1.
RF
receive
Analog
receive
RF
transmit
Analog
transmit
PLL VCO 1/2 PLL
MAC
Registers
CPU
Sequencers
Accelerator
Interface
UART
GPIO
I2C
I2S
SDIO
PWM
ADC
SPI
PMU
Crystal
Bias circuits
SRAM
PMU
Flash
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Figure 3-1. Functional Block Diagram
3.1. CPU, Memory, and Flash
3.1.1. CPU
ESP8266EX integrates Tensilica L106 32-bit micro controller (MCU) and ultra-low-power
16-bit RSIC. The CPU clock speed is 80 MHz. It can also reach a maximum value of 160
MHz. Real Time Operation System (RTOS) is enabled. Currently, only 20% of MIPS has
been occupied by the Wi-Fi stack, the rest can all be used for user application
programming and development. The CPU includes the interfaces as below.
• Programmable RAM/ROM interfaces (iBus), which can be connected with memory
controller, and can also be used to visit flash.
• Data RAM interface (dBus), which can connected with memory controller.
• AHB interface which can be used to visit the register.
3.1.2. Memory
ESP8266EX Wi-Fi SoC integrates memory controller and memory units including SRAM
and ROM. MCU can access the memory units through iBus, dBus, and AHB interfaces. All
memory units can be accessed upon request, while a memory arbiter will decide the
running sequence according to the time when these requests are received by the
processor.
According to our current version of SDK, SRAM space available to users is assigned as
below.
Espressif
$7/$25
2016.11
11 Page | ||
| Páginas | Total 29 Páginas | |
| PDF Descargar | [ Datasheet ESP8266EX.PDF ] | |
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