Product Introduction
The WTK6900HCx-32N Recognition Dialogue chip is designed for local voice-triggered engines, featuring low cost, high reliability, and strong versatility. It comes in two models: WTK6900HC8-32N and WTK6900HC3-32N. In terms of voice technology, 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.
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 (WTK6900HC8-32N) / 4MB SPI FLASH (WTK6900HC3-32N)
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, single-ended or differential output
Power Supply
– VBAT is 3.3V to 5.5V
– VDDIO is 3.3V to 3.6V
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 master and device modes
– External wake-up/interrupt on all GPIOs
Package and Operating Temperature
– QFN32 (4mm x 4mm)
– Operating temperature range: -40°C to +85°C
– Storage temperature range: -65°C to +150°C
Application Areas
– Smart home appliances (household appliances, health appliances, kitchen appliances, etc.)
– Smart bathroom, smart lighting, smart electromechanics, smart home
– Smart toys
Chip pin
Typical circuit
Application block diagram
