Description: 
    
    MS322 is a OTP Type Voice Recording MCU and support SPI interface for recorded voice data, preload Voice and Melody. It integrates many peripherals : 14bit ADC / DAC, Microphone input with OP-AMP, AGC,  Class D 0.8W Audio Output to directly drive speaker with high quality and power saving controll. MS322 is a highly integrated IC with high performance, low distance and clear voice recording functions.

 Specification : 
    
    ■ MS322 is a OTP Type Voice Recording MCU
    ■ MS322 with difference size SPI Flash
    ■ Store recorded Voice, pre-load Voice and Melody
    ■ Storage length from  8s to 90mins. 
    
    ■ It integrates many peripherals : 
        ■ 14 Bits ADC / DAC
        ■ Microphone input with OP-AMP 
        ■ Auto Gain Control (AGC)
        ■ 14 Bit Audio CODEC
        ■ Class D 0.8W Audio Amplifier Output 
        ■ directly drive speaker with high quality
        ■ saving power conroller.
    ■ Three different playing mode : 
        A. Multi segment recorded voice / pre-load Voice and Melody. 
        B. Recorded Voice Mix with pre-load Voice or Melody. 
        C. Auto recording and playback by sound detection. 
    ■ Use different internal devices can perform different functions :  
        ■ Digital Volume Control 
        ■ Segment Selection
        ■ Single Segment Erase 
        ■ Erase All
        ■ LED indicator
        ■ Sampling Adjustment Voice Changer

Specification: 
    ■ Operating Voltage: 
        ■ 2.0~4.3V POR Disable 
        ■ 2.6~4.3V POR Enable 
    ■ Oscillator:ERC 10MHz @ 2.4V, 16M@3.6V
    ■ 8-Bit RISC CPU , 4 Levels Stack
    ■ 4k Bytes OTP ROM, 2K Bytes RAM (Shared with Internal Use)
    ■ Voice processing format:ADPCM /  μ-Law (ITU-T G.711 Standard)
    ■ Support low noise μ-Law audio format         
    ■ 14Bit high Quality Audio ADC input,14Bit DAC output
    ■ Class D Amplifier, direct drive 8~32Ω speaker,
    ■  maximum output 0.8W
    ■ Build in Microphone gain OP-AMP and internal AGC 
    ■ Sampling Rate from 4K~16K
    ■ 2 Channel Melody Generator
    ■ Support speaker as microphone input and sound output.         
    ■ I/O port : 8 I/O ports  & 5 input ports 
        ■ Programmable internal pull high or Open Drain 
        ■ Input pin with external wake up 
    ■ SPI interface for SPI Flash or other SPI devices
    ■ Watchdog Timer
    ■ Timer 2 x 16 Bits
    ■ LVD (Low Voltage Detect) / LVR (Low Voltage Reset)
    ■ POR (Auto Power ON Reset), can be disable by Software

Function:         
    ■ Recording Length from 8s to 64mins (8kHz), 
    ■ Support SPI Flash interface.
    ■ Long Distance Recording
    ■ pre-load Voices & Melody Stored in SPI Flash
    ■ Support Pre-load speech / melody
    ■ Support in circuit programming.
    ■ Digital Output Volume Control by software
    ■ Voice Change : Support Pitch Shift Voice Change.
    ■ Voice Change Effects : Childish, Girl, Elder & Robotic. 
    
    ■ 3 Play Modes : 
        ■ Recorded Segments / pre-load Voice / Melody
        ■ Recorded Segment mixed with pre-load Voice / Melody
        ■ Sound detect, auto recording and auto playback.