ESP8685屬于RF/IF射頻/中頻RFID的射頻收發(fā)器IC。由樂鑫信息科技（上海）有限公司制造生產(chǎn)的ESP8685射頻收發(fā)器 IC射頻收發(fā)器 IC 是將發(fā)射器和接收器集成于單個(gè)封裝的半導(dǎo)體器件。收發(fā)器適用于各種射頻系列產(chǎn)品或標(biāo)準(zhǔn)，例如 AISG、藍(lán)牙、ISM、VHF、Wi-Fi、蜂窩、雷達(dá)、802.15.4 和 Z-Wave。此產(chǎn)品可根據(jù)調(diào)制類型和特定協(xié)議版本進(jìn)一步分類。部分 IC 包含內(nèi)置微控制器。

Features

Wi-Fi

? IEEE 802.11b/g/n-compliant

? Supports 20 MHz, 40 MHz bandwidth in 2.4 GHz band

? 1T1R mode with data rate up to 150 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)

? Four virtual Wi-Fi interfaces

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

promiscuous mode

Note that when ESP8685 scans in Station mode, the SoftAP channel will change along with the Station

channel

? Antenna diversity

? 802.11mc FTM

Bluetooth?

? Bluetooth LE: Bluetooth 5, Bluetooth mesh

? 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 160 MHz

? CoreMark? score:

– 1 core at 160 MHz: 483.27 CoreMark; 3.02 CoreMark/MHz

? 384 KB ROM

? 400 KB SRAM (16 KB for cache)

? 8 KB SRAM in RTC

? In-package flash

? Access to flash accelerated by cache

? Supports flash in-Circuit Programming (ICP)

Advanced Peripheral Interfaces

? 15 programmable GPIOs

? Digital interfaces:

– Three SPI (SPI0 and SPI1 are used to connect the in-package flash. Only SPI2 is available)

– Two UART

– I2C

– I2S

– Remote control peripheral, with 2 transmit channels and 2 receive channels

– LED PWM controller, with up to 6 channels

– Full-speed USB Serial/JTAG controller

– General DMA controller (GDMA), with 3 transmit channels and 3 receive channels

– TWAI? controller compatible with ISO 11898-1 (CAN Specification 2.0)

? Analog interfaces:

– Two 12-bit SAR ADCs, up to 6 channels

– Temperature sensor

? Timers:

– Two 54-bit general-purpose timers

– Three digital watchdog timers

– Analog watchdog timer

– 52-bit system timer

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

? 4096-bit OTP, up to 1792 bits for users

? Cryptographic hardware acceleration:

– AES-128/256 (FIPS PUB 197)

– SHA Accelerator (FIPS PUB 180-4)

– RSA Accelerator

– Random Number Generator (RNG)

– HMAC

– Digital signature

RF Module

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

? Up to +21 dBm of power for an 802.11b transmission

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

? Up to -105 dBm of sensitivity for Bluetooth LE receiver (125 Kbps)