The module adopts the 32bitRSIC architecture core, and adds the DSP instruction set specifically for signal processing and speech recognition, the FPU operation unit that supports floating-point operations, and the FFT accelerator.The audio signal is trained and learned through the neural network to improve the voice signal.Recognition ability.The solution supports offline recognition of 150 local commands, can freely customize wake-up words, command words and response broadcast words, and has a wealth of peripheral interfaces.Built-in 5V to 3.3V, 3.3V to 1.2V LDO to power the chipSupport dual channel DAC outputThe high-performance pure offline voice recognition module can be widely and quickly applied to smart homes, various smart small appliances, 86 boxes, toys, lamps, industrial, Internet of Things, automobiles, security and lighting and other products that require voice control.parameterProcessingcore:32bitRISC core, running frequency 240MSupport DSP instruction set and FPU floating point arithmetic unitFFT accelerator: supports up to 1024 points of complex FFT/IF FT operations or 2048 points of real FFT/IF FT operationsCustomized speech algorithm operatorStorage: Built-in high-speed SRAMBuilt-in 2MB FLASHAudio input and output:Support 1 analog Mic inputSupport dual-channel DAC outputSupport 12S input outputPower supply and clock:Built-in 5V to 3.3V, 3.3V to 1.2VLDO to power the chipRC12MHz clock source and PLL phase-locked loop clock sourcePOR (Power on Reset), low voltage detectionPeripheral interface:Support up to 10 GPIOAll GPIOs can be configured as external interrupt input and wake-up sources1 standard SPI Master interface, the highest rate is 30MHz1 SPI Slave interface with a maximum rate of 30MHz 1 full-duplex UART with a maximum rate of 3Mbps1 I2C master/slave controller with a maximum speed of 400kHz2 PWM outputs1 12-bitS AR-ADC maximum 450Khz sampling rateColour: GreenMaterial: PCBSize: 18 x 16mmPackage Contents:1 x development board1 x microphone1 x speaker1 x USB cableOnly the above package content, other products are not included.Note:Light shooting and different displays may cause the color of the item in the picture a little different from the real thing.The measurement allowed error is +/- 1-3cm.