具體功能:兩個tg,一個tg為錄音key,level hold方式,hold住開始錄音,松開結束錄音,同時led以1hz頻率閃爍,提示錄音結束可以開始播放錄音.直到按下播放鍵,停止1hz閃爍.
另外一個tg,為播放key,eur觸發方式,按下播放錄音,同時led會隨音量閃燈,聲音播放后led熄掉.
 

features

single-chip solution for high-quality speech playback & recording with default 6.0 sec duration    with  5.4 k sampling rate.

 recording duration can be adjusted to various sampling rate via external resistor.

 internal access clock runs at typically 2 mhz.

 built-in r/c oscillator circuit with external resistor option for adjustment of operating frequency.

 playing key can be level or edge triggered.

 recording key is default level triggered and can be edge triggered by using optional application circuit.

 supports blinking indicator for new recording message.

 built-in microphone differential pre-amplifier with auto

gain control (agc) circuit.

 auto-playback after completion of recording

 entering auto power-down mode immediately after recording/playback

 prompt beep sound for recording with bonding option

 supports both class ab and class d embedded amplifiers for driving 8?/0.5w speakers.

 embedded class d amplifier features good power efficiency and better speech quality & higher resolution than pwm speech solution.

 embedded 16-bit adc with for microphone input

 embedded 16-bit dac for speech output.

 supply voltage 2.4v to 3.6v.

 standby current less than 1 ua