Description: DTMF (Dual Tone Multi-Frequency), the dual tone multi-frequency signals, signaling a Telecommunications Services of communication, it has a strong anti-interference ability, it is widely used for remote communications such as telephone dial-up communications. DTMF signal based on long-distance single chip can have a variety of ways, such as with the D/A converter to achieve (based PWM), can also be set DTMF signal transceiver functions in one of the MT8880 chip, and so on.
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E4水宝_陈苗苗--基于单片机的DTMF远程通讯.doc
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