MT8870 DTMF Speech Decoding Module

MT8870 DTMF Speech Decoding Module Telephone Module ccmcall control for uno r3

Specifications:
Separate analog, digital, and IO power supply
Serial data and control interface (SPI)
1 headphone and audio output interface
1 microphone for recording, support audio encoding format
1 line input interface; supports MP3 and WAV stream
Power indicator light
On-board 3.3 V and 2.5 V LDO chip AMS-1117, maximum current of 800 mA
Single Power Supply: +5 VDC, capacitor filter
12.288 MHz crystal