GENERAL DESCRIPTION
The ST3011 is a highly integrated and cost-effective 24-bit DSP based audio processor for various consumer applications. It consists of one powerful DSP for advanced voice decoder and encoder algorithms of natural speech with less memory. It provides middle bit rate compression (MBRC) for voice playback and audio playback.

FEATURES
■ 24-bit DSP based voice/audio processor
■ Operation voltage
    – Core logic: 2.25V~2.7V
    – I/O pads: 3.0V~3.6V
■ Voltage regulator for core logic
■ Low Voltage Reset (LVR)
    _ 2.5V low voltage reset
■ One PLL to generate high system frequency from a
    3MHz source
    _ 12M~30MHz PLL output
■ Tow clock sources
    _ Crystal...........................................................3MHz
    _ External input...……………………………......3MHz
■ Low power down current
    _Typical current: 3uA
■ One 16-bit programmable Timer
■ One clocking output
■ One external interrupt
    _ Edge/level trigger supported
■ One 16-bit direct-drive DAC
    – Maximum current: 145mA
■ MCU interfaces
    _ Parallel mode
■ Two Serial PORT interfaces(SP)
    _ Programmable data length from 8-bit to 16-bit
    _ I2S, Left/Right Justified interfaces to external DAC/ADC