Wi-Fi:

802.11 a/b/g/n 1T1R 2.4/5GHz dual frequency.

Processing Wi-Fi messages using independent Microcontrollers.

Support low power TX/RX mode in short distance applications.

Support narrow-band mode: 10MHz bandwidth.

Support Antenna diversity.

Support the IEEE Power Save Model

BT 5.0 Low Energy:

Comply with Low Power Bluetooth 5.0 Standard.

Support high power mode (10dbm).

Wi-Fi and BLE time division multiplexing and share the same PA and antenna.

Support Bluetooth Master-Slave Mode and BLE Mesh

Audio Codec:

Support 8, 16, 32, 44.1, 48 and 96 kHz sampling rates

24-bit stereo DAC and DAC

Headphone speakers supporting 16ohm and 32ohm loads

Two Digital Microphone Interfaces

Bias Voltage of Built-in Microphone

Optional Voice Processor for Intelligent Noise Reduction

Peripherals

34 x GPIO

1 x USB

3 x SPI

1 x I2C

1 x Infrared

11 x PWM

3 x UART：1 x Log UART、1 x LP UART、1 x HS UART

The baud rate is as high as 4M.

Up to 7 channels 12-bit ADC, 1M sampling rate, battery power detection

Low power RTC (32kHz)

Up to 5 x 5 matrix keyboard and 4 touch keys can be supported

Operating Temperature：-30℃ to +85℃

Antenna Type：

On-Board PCB Antenna，or IPEX Connector

I2S Interface：

Output: 16/24 bit，24K-384K Sampling rate stereo.

Input: 16 bit，24K-96K Sampling rate dual microphone.

Full duplex input/output stereo audio

5.1 Channel Output.

Safety：

ARM Trust Zone-M Technology.

AES/SHA Hardware Accelerator, Random Number Generator

Security boot Safe Start

Anti-reading mechanism: JTAG interface protection, flash encryption technology.

Hardware Architecture: