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