ESP32 datasheet(29/64 Pages) ESPRESSIF

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3. Functional Description

• Class-1 operation without external PA

• Internal SRAM allows full-speed data-transfer, mixed voice and data, and full piconet operation

• Logic for forward error correction, header error control, access code correlation, CRC, demodulation, en-

cryption bit stream generation, whitening and transmit pulse shaping

• ACL, SCO, eSCO and AFH

• A-law, µ-law and CVSD digital audio CODEC in PCM interface

• SBC audio CODEC

• Power management for low-power applications

• SMP with 128-bit AES

3.6.2 Bluetooth Interface

• Provides UART HCI interface, up to 4 Mbps

• Provides SDIO / SPI HCI interface

• Provides PCM / I²S audio interface

3.6.3 Bluetooth Stack

The Bluetooth stack of the chip is compliant with the Bluetooth v4.2 BR/EDR and Bluetooth LE specifications.

3.6.4 Bluetooth Link Controller

The link controller operates in three major states: standby, connection and sniff. It enables multiple connections,

and other operations, such as inquiry, page, and secure simple-pairing, and therefore enables Piconet and Scat-

ternet. Below are the features:

• Classic Bluetooth

– Device Discovery (inquiry, and inquiry scan)

– Connection establishment (page, and page scan)

– Multi-connections

– Asynchronous data reception and transmission

– Synchronous links (SCO/eSCO)

– Master/Slave Switch

– Adaptive Frequency Hopping and Channel assessment

– Broadcast encryption

– Authentication and encryption

– Secure Simple-Pairing

– Multi-point and scatternet management

– Sniff mode

– Connectionless Slave Broadcast (transmitter and receiver)

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ESP32 Datasheet V3.4

ESP32 Datasheet(PDF) 29 Page - ESPRESSIF SYSTEMS (SHANGHAI) CO., LTD.