Product Introduction
The WTK6900Hxx-16S Voice Recognition chip is designed for local voice-triggered engines, featuring low cost, high reliability, and strong versatility. It achieves high-reliability wake-up recognition rates, longer wake-up distances, lower false wake-up rates, a greater number of voice control commands, stronger noise resistance, and faster response recognition times in voice technology.
Chip characteristics
Kernel and Storage
– High-performance 32-bit core with a clock speed of 240MHz, supporting hardware floating-point operations
– Built-in 1MB SPI FLASH
AI Algorithms
– Offline voice recognition using the latest neural network algorithms, offering high accuracy and low error rates, reliable recognition up to 5 meters away
– Voice noise reduction algorithm: filters out steady-state noise and effectively suppresses dynamic noise, ensuring accurate recognition even in noisy environments
– Audio decoding: supports MP3, WAV audio decoding
Audio
– Two-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 drive output
Power Supply
– VCC ranges from 3.3V to 5.5V
– VOUT ranges from 2.2V to 3.4V
Bluetooth
– Compliant with Bluetooth V5.1 + BR + EDR + BLE specifications
– Meets transmission power consumption requirements for Class 1, Class 2, and Class 3
– Supports all package types including GFSK and π/4 DQPSK
– Provides +6dBm transmission power
– Receiver sensitivity of -90dBm
– Fast AGC enhances dynamic range
– Supports profiles such as a2dp, avctp, avdtp, avrcp, hfp, spp, smp, att, gap, gatt, rfcomm, sdp, l2ca
Peripherals
– Four multifunctional 16-bit timers, supporting capture and PWM modes
– Two 16-bit PWM driver generators
– One full-duplex basic UART
– One SPI interface supporting host and device modes
– External wake-up/interrupt on all GPIOs
Operating Temperature
– Operating temperature range: -40°C to +85°C
– Storage temperature range: -65°C to +150°C
Application Areas
– Smart home appliances (lifestyle appliances, health appliances, kitchen appliances, etc.)
– Smart bathroom, smart lighting, smart electromechanics, smart home
– Smart toys
Selection table
For samples: Please select the corresponding chip model and function code according to the selection table below, and contact our sales personnel.
| Functional code | Chip model | Examples of application | Functional description |
| S003 | WTK6900H-24SS | Table lamp | The instruction supports USB drive upgrades, standard serial port output, voice announcement after recognition, and BLE passthrough functionality. |
| S005 | WTK6900H-24SS | Massage instrument | Supports USB drive upgrades, standard serial port output, and announces after recognition. |
| S006 | WTK6900H-24SS | Smart toilet | Supports USB drive upgrades, standard serial port output, and announces after recognition. |
| S020 | WTK6900H-24SS | Electric fan | After identification, output the serial port and announce it. |
Encapsulation pin
| NO | Name | Functional description |
| 1 | DACL | DAC audio output |
| 2 | P21/DACA | / |
| 3 | VCC | Power input |
| 4 | VOUT | External storage power port (must connect a 106 capacitor to ground) |
| 5 | P17/|BUSY | BUSY Pin |
| 6 | ANT | Antenna |
| 7 | OSCI | Connect a 24MHz crystal oscillator |
| 8 | OSCO | Connect a 24MHz crystal oscillator |
| 9 | RX | UART asynchronous serial data input |
| 10 | TX | UART asynchronous serial data output |
| 11 | ICEDAT/D- | Burning mouth |
| 12 | ICECLK/D+ | Burning mouth |
| 13 | MICLDO | Microphone power supply, microphone power input terminal |
| 14 | MIC+ | Microphone input |
| 15 | GND | Negative electrode |
| 16 | VMID | / |
Circuit design reference
SOP16 packaging application block diagram
