Product Description
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
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
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