Product Introduction
WTK6900HC is the Voice recognition module of the local voice trigger engine. This module is based on the most advanced deep neural network (DNN-HMM) speech recognition technology, and realizes high recognition rate, high real-time performance, local and cloud combination, and highly integrated speech recognition and processing functions; it can realize specific intelligent voice interaction effects such as semantic recognition. At the same time, the module has the control and computing processing capabilities of a conventional MCU, and can realize various applications that require communication and control.
In terms of application, the module can support local voice detection and wake-up, offline 3-5 meter far-field recognition and 300 offline command entries. The module can push commands to the original host computer of the device through UART to realize a simple voice interaction interface. The module solution supports Chinese and English, and can be widely used in home appliances, lighting, toys, wearable devices, industry, automobiles and other product fields to realize voice interaction and control and various intelligent voice solution applications.
Module Features
- Core and storage
CPU main frequency can reach 240 MHz, support hardware floating point operation
Built-in 1MBytes SPI Flash memory - AI algorithm
Offline speech recognition, using the latest neural network algorithm, has the advantages of accurate recognition, low misjudgment rate, and reliable recognition at 5 meters far field
Speech noise reduction algorithm: filter out steady-state noise, also has a good suppression effect on dynamic noise, and can accurately recognize under noise
Audio decoding: support MP3, WAV audio decoding - Audio
Single-channel 16-bit DAC, SNR >= 95dB
Single-channel 16-bit ADC, SNR >= 90dB
Sampling rate supports 8KHz / 11.025KHz / 16KHz / 22.05KHz / 24KHz / 32KHz / 44.1KHz / 48KHz
DAC supports direct-push output - Power supply
VCC is 3.3V to 5.5V
VOUT is 2.2V to 3.4V - Bluetooth
Complies with Bluetooth V5.1 + BR +EDR +BLE specifications
Meet Class1 class2 and class3 transmission power requirements
Supports all package types of GFSK and π/4 DQPSK
Provides +6dbm transmit power
Receiver with -90dBm sensitivity
Fast AGC for enhanced dynamic range
Supports a2dp \ avctp \ avdtp \ avrcp \ hfp \ spp \ smp \ att \ gap \ gatt \ rfcomm \ sdp \ 12ca profiles - Peripherals
Four multi-function 16-bit timers supporting capture and PWM modes
Two 16-bit PWM drive generators
One full-duplex basic UART
One SPI interface supports host and device modes
External wake-up/interrupt on all GPIOs - Operating temperature
Working temperature: -40℃ to +85℃
Storage temperature: -65℃ to +150℃ - Application areas
Smart home appliances (life appliances, health appliances, kitchen appliances, etc.)
Smart bathroom, smart lighting, smart electromechanical, smart home.
Smart toys
Pin Definition
WTK6900HC-16S M02 module physical picture
| Pin No | Signal name | Functional Description |
| 1 | MIC+ | Connect to the positive terminal of the microphone |
| 2 | MIC- | Connect to the negative terminal of the microphone |
| 3 | SPK+ | Speaker terminal positive |
| 4 | SPK- | Speaker terminal negative |
| 5 | WT8002 | Amplifier chip |
| 6 | WTK6900HC-16S | Voice recognition chip |
| 7 | Horn working indicator light | Lights up red when not working, turns off when working |
| 8 | TX Indicator Lights | TX reaches 3.3V and lights up green |
| 9 | VCC | Power Input（3.3~5.5V） |
| 10 | GND | GND |
| 11 | TX | UART asynchronous serial port data output |
| 12 | RX | UART asynchronous serial port data input |
| 13 | Power supply port | TYPE-C Power input（5V/1A/2A） |
WTK6900HC-16S M02 physical pin description
WTK6900HC-16S M02 module pin package diagram
