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Features

Wi-Fi

? Complies with IEEE 802.11b/g/n

? Supports 20 MHz bandwidth in 2.4 GHz band

? 1T1R mode with data rate up to 72.2 Mbps

? Wi-Fi Multimedia (WMM)

? TX/RX A-MPDU, TX/RX A-MSDU

? Immediate Block ACK

? Fragmentation and defragmentation

? Transmit opportunity (TXOP)

? Automatic Beacon monitoring (hardware TSF)

? Three virtual Wi-Fi interfaces

? Simultaneous support for Infrastructure BSS in Station mode, SoftAP mode, Station + SoftAP mode, and

promiscuous mode

Note that when ESP8684 series scans in Station mode, the SoftAP channel will change along with the

Station channel

? Antenna diversity

Bluetooth

? Bluetooth LE: Bluetooth 5.3 certified

? High power mode (20 dBm)

? Speed: 125 Kbps, 500 Kbps, 1 Mbps, 2 Mbps

? Advertising extensions

? Multiple advertisement sets

? Channel selection algorithm #2

? Internal co-existence mechanism between Wi-Fi and Bluetooth to share the same antenna

CPU and Memory

? 32-bit RISC-V single-core processor, up to 120 MHz

? CoreMark? score:

– One core at 120 MHz: 305.42 CoreMark; 2.55 CoreMark/MHz

? 576 KB ROM

? 272 KB SRAM (16 KB for cache)

? In-package flash (see details in Chapter 1 ESP8684 Series Comparison)

? Access to flash accelerated by cache

? Supports flash in-Circuit Programming (ICP)

Advanced Peripheral Interfaces

? 14 programmable GPIOs

– 2 strapping GPIOs

? Digital interfaces:

– Three SPI

– Two UART

– I2C Master

– LED PWM controller, with up to 6 channels

– General DMA controller (GDMA), with 1 transmit channel and 1 receive channel

? Analog interfaces:

– 12-bit SAR ADC, up to 5 channels

– Temperature sensor

? Timers:

– 54-bit general-purpose timer

– Two watchdog timers

– 52-bit system timer

Low Power Management

? Fine-resolution power control through a selection of clock frequency, duty cycle, Wi-Fi operating modes,

and individual power control of internal components

? Four power modes designed for typical scenarios: Active, Modem-sleep, Light-sleep, Deep-sleep

? Power consumption in Deep-sleep mode is 5 μA

? RTC memory remains powered on in Deep-sleep mode

Security

? Secure boot - permission control on accessing internal and external memory

? Flash encryption - memory encryption and decryption

? 1024-bit OTP, up to 256 bits for users

? Cryptographic hardware acceleration:

– ECC

– SHA Accelerator (FIPS PUB 180-4)

? Random Number Generator (RNG)

? Clock glitch filter

RF Module

? Antenna switches, RF balun, power amplifier, low-noise receive amplifier

? Up to +22 dBm of power for an 802.11b transmission

? Up to +20 dBm of power for an 802.11n transmission

? Up to -106 dBm of sensitivity for Bluetooth LE receiver (125 Kbps)

Applications

With ultra-low power consumption, ESP8684 is an ideal choice for IoT devices in the following areas:

? Smart Home

? Industrial Automation

? Health Care

? Consumer Electronics

? Smart Agriculture

? POS Machines

? Service Robot

? Generic Low-power IoT Sensor Hubs

? Generic Low-power IoT Data Loggers