具体功能:两个tg,一个tg为录音key,level hold方式,hold住开始录音,松开结束录音,同时led以1hz频率闪烁,提示录音结束可以开始播放录音.直到按下播放键,停止1hz闪烁.
另外一个tg,为播放key,eur触发方式,按下播放录音,同时led会随音量闪灯,声音播放后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