WTK6900FC-24SS Voice Recognition Control Chip

Product Overview

The WTK6900FC is an AI chip specifically designed for voice processing. This chip is based on the most advanced deep neural network (DNN-HMM) speech recognition technology, achieving high recognition rates, high real-time performance, integration of local and cloud capabilities, and highly integrated voice recognition and processing functions; it can realize semantic recognition and other specific intelligent voice interaction effects. Additionally, the chip possesses conventional MCU control and computing capabilities, enabling various applications requiring communication and control. In terms of application, the chip supports local voice detection and wake-up, offline far-field recognition up to 5-8 meters, and three hundred offline command entries. The chip can push commands to the existing host device via UART, implementing a simple voice interaction interface. The chip solution also supports multiple global languages such as Chinese, English, and Japanese, and can be widely applied in home appliances, lighting, toys, wearable devices, industrial, automotive products, among others, to achieve voice interaction and control and various intelligent voice solutions.

Chip characteristics

Kernel and Storage
– CPU clock speed up to 220 MHz
– Built-in 2 MBytes Flash memory
– Built-in 640 KBytes SRAM
– Built-in 512-bit eFuse for application encryption
AI Algorithms
– BNPU V3 supports various neural networks such as DNN, TDNN, RNN, CNN, and parallel vector operations, enabling functionalities like voice recognition, command word self-learning, voice detection, and deep learning noise reduction
Audio Codec
– High-performance low-power audio ADC, SNR ≥ 95 dB
– Low-power audio DAC, SNR ≥ 95 dB
Audio Interfaces
– 1 IIS interface, supports master-slave configuration
– 1 dual-channel PDM interface
ADC and PWM
– Built-in 1-channel 12-bit SAR ADC
– Supports 6 PWM interfaces
GPIO
– 10 high-speed GPIOs, response rate up to 20 MHz
– 7 of which support 5V input
Reset and Power Management
– Built-in power management unit PMU
– PMU input voltage range: 3.6V to 5.5V
– Built-in power-on reset (POR)
– Built-in voltage detector (PVD)
Clock
– Built-in RC oscillator, also supports external crystal oscillator; developers can choose between built-in RC or external crystal based on different application needs
Communication Interfaces
– 1 IIC interface
– 3 UART interfaces, supports 5V communication, supports up to 3 Mbps speed
Timer and Watchdog
– Built-in 4 groups of 32-bit timers and 2 watchdogs
Package and Operating Temperature Range
– SSOP24 package
– Operating temperature range: -40°C to 85°C
Application Areas
– Smart home appliances (household appliances, health appliances, kitchen appliances, etc.)
– Smart bathroom, smart lighting, smart electromechanics, smart home
– Smart toys

SSOP24 Encapsulation pin

Circuit design reference