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Overview

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The BK7271 is a 2.4 GHz 802.11n, dual-mode Bluetooth, FM receiver combo chip with smart audio capability. It can stream audio from a cloud server, decode it and play it with local audio peripherals. The BK7271 integrates complete smart audio features, including array microphone noise reduction, acoustic echo cancellation, and speech keyword recognition. The BK7271 supports star and mesh networking for Wi-Fi and Bluetooth. It supports concurrent SoftAP and STA, and concurrent Bluetooth Low Energy and Classic connections.

The BK7271 is a multi-core architecture, the host MCU is responsible for the application, and the audio processor is dedicated to signal processing.

The BK7271 has an isolated and immutable platform Root of Trust, providing security services such as secure boot and secure cryptographic operations to applications running on non-secure processing environments. The SiP flash with content encryption provides secure code and data storage.

Features

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• 802.11 b/g/n 1x1 compliant

• Concurrent SoftAP+STA

• Dual-mode Bluetooth 5.0

• Bluetooth SIG mesh supported

• FM radio receiver

• QSPI for RAM and flash extension

• Multiplexing program download interface and JTAG interface

• 2x full-speed USB

• 1x SDIO

• 3x SPI

• 2x I2C

• 3x high-speed UART

• 6x 32-bit timer

• 1x AON timer

• 12x 32-bit PWM channel

• 4x audio ADC

• 2x audio DAC

• 1x stereo line in input

• 3x I2S, 1 with three output lines

• 1x multi-channel ADC

• 8-bit CMOS image sensor DVP

• VGA Motion JPEG hardware encoder with DMA capability

• Platform Root of Trust with isolated security element

• SiP flash and SiP RAM

• 26 MHz and 32 kHz clock signal output

• Charging control circuit