Msp430c112 Irda Sir Encoder/decoder

The MT8870 is a complete DTMF receiver integrating both the bandsplit Filter and digital decoder functions. The Filter section uses switched capacitor techniques for high and low group filters; the decoder uses digital counting techniques to detect and decode all 16 DTMF tone-pairs into a 4-bit code. External component count is minimized by on chi

p provision of a differential input Amplifier Clock Oscillator and latched three-state bus Interface

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