Ai-Thinker VC-02 Offline Voice Recognition Module

Description

Ai-Thinker VC-02 Offline Voice Recognition Module The Ai-Thinker VC-02 Offline Voice Recognition Module is an advanced, cost-effective solution designed to integrate seamless voice control into a variety of applications without requiring an internet connection. Developed by Shenzhen Ai-Thinker Technology Co., Ltd., this module leverages the US516P6 voice chip from Unisound, delivering high reliability and versatility in speech recognition technology. It supports bilingual recognition in Chinese and English, achieving a comprehensive recognition rate exceeding 98% and an identification time of less than 100ms. Capable of handling up to 150 local instructions offline, the VC-02 is ideal for applications ranging from smart home automation to interactive toys and voice-activated appliances. Features: Kernel 32bit RISC core, running at 240MHz Support DSP instruction set and FPU floating-point operation Unit FFT Accelerator: Support 1024-point complex FFT/IFFT operations, or 2048-point real FFT/IFFT operations Unisound customized speech algorithm operator Storage Built-in 242KB high-speed SRAM Built-in 2MB FLASH Audio input and output Supports 1 analog Mic input, SNR ≥ 94dB Support 4-channel digital Mic input Support dual-channel DAC output Supports I2S input/output Power supply and clock Support 3.6 V-5V Range Power Input Built-in 5V to 3.3V,3.3V to 1.2V LDO power the chip RC 12MHz clock source and PLL locked loop clock source Built-in POR(Power on Reset), low voltage detection and watchdog Peripheral All GPIOs can be configured as external interrupt input and wake-up source 1 full-duplex UART with a maximum rate of 3Mbps. Support SPI, I2C, ADC, PWM interface SDK Provides complete RTOS-based SDK Support fast and convenient UART, I2C and other control protocol development Specifications: Category Specification Model VC-02 Package SMD-20 Dimension 18mm × 17mm × 3.2mm(±0.2 mm) Working Temperature -40°C ~ 85°C Storage Environment -40°C ~ 125°C, <90% RH Power Supply 3.6V ~ 5V, current >500mA Interfaces UART/I²C/PWM/SPI/GPIO I/O Pins 10 UART Rate Default 115200 bps SPI Flash 2MB (built-in) Pin Configuration: in # Name Function Description 1 DAC_R Reserved R-channel audio output (not currently supported) 2 MIC- MIC- Input 3 MIC+ MIC+ Input 4 TX1 GPIO_B6 / UART1_TXD, 3.3V level 5 RX1 GPIO_B7 / UART1_RXD, 3.3V level 6 IOA25 IO / ADC4 / SPI_MISO 7 NC Hanging (No Connection) 8 SDA GPIO_B3 / I2C_SDA / TIM4_PWM, 3.3V level 9 SCL GPIO_B2 / I2C_SCL / TIM3_PWM, 3.3V level 10 IOB0 IO / UART1_TXD / I2C_SCL / TIM3_PWM 11 IOB1 IO / UART1_RXD / I2C_SDA / TIM4_PWM 12 NC Hanging (No Connection) 13 IOA26 IO / ADC5 / SPI_CLK 14 DAC_L Reserved L-channel audio output (not currently supported) 15 IOB8 IO / Virtual Software UART-TX (Log Output Pin) 16 IOA27 IO / US_SPIM_MOSI 17 VCC 3.6-5V power input 18 GND Ground 19 SPK- SPK- (8Ω 2W) 20 SPK+ SPK+ (8Ω 2W) Applications: Smart home automation: voice-controlled lights, fans, and other appliances. Interactive toys: robots or dolls that respond to voice commands. Voice-activated switches for controlling electrical devices. Simple voice assistants for basic tasks like setting timers or alarms. Educational tools for language learning through voice interaction. Package Include: 1x Ai-Thinker VC-02 Offline Voice Recognition Module. Data Sheet: VC-02

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