CM9902：
CPU
32-bit DSP Up to 160MHz programmable processor
64Vectored interrupts; 4 Levels interrupt priority
DSP Audio Processing
Supports MP2, MP3, WMA audio decoding
10-band EQ configuration for voice Effects
Built-in microphone echo function
Audio Codec
Two channels 16-bit DAC, SNR >= 92dB
One channels 16-bit ADC , SNR >= 90dB
Sampling rates of
8KHz/11.025KHz/16KHz/22.05KHz/24KHz/32KHz/44.1KHz/48KHz are supported
One analog MIC amplifier, build-in MIC bias generator
Two channels Mono analog MUX
Supports cap-less, single-ended, and differential mode at the DAC path
Supports 16ohm and 32ohm Speaker loading
Peripherals
Full speed USB 2.0 OTG controller
Multi-function 32-bit timers, support capture and PWM mode
Three full-duplex basic UART, UART0 and UART1 supports DMA mode
Two SPI interface supports host and device mode
One hardware IIC interface supports host and device mode
10-bit ADC for analog sampling
External wake up/interrupt on all GPIOs
应用市场：
用于插卡音箱，电动牙刷，带数码显示类的产品。
