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TW2864D Datasheet(PDF) 41 Page - Renesas Technology Corp |
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TW2864D Datasheet(HTML) 41 Page - Renesas Technology Corp |
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41 / 110 page  TW2864 FN7745 Rev. 0.00 Page 41 of 110 September 28, 2012 SERIAL AUDIO INTERFACE There are 3 kinds of digital serial audio interfaces in the TW2864, the first is a recording output, the second is a mixing output and the third is a playback input. These 3 digital serial audio interfaces follow a standard I2S or DSP interface, as shown in Figure 25. MSB LSB MSB LSB MSB 1/fs ASYN ACLK ADAT Data 1 Data 2 (a) I2S Format MSB LSB MSB LSB MSB 1/fs ASYN ACLK ADAT Data 1 Data 2 (b) DSP Format FIGURE 25. TIMING CHART OF SERIAL AUDIO INTERFACE PLAYBACK INPUT The serial interface using the ACLKP, ASYNP and ADATP pins accepts the digital serial audio data for the playback purpose. The ACLKP and ASYNP pins can be operated as master or slave mode. For master mode, these pins work as output pin and generate the standard audio clock and synchronizing signal. For slave mode, these pins are input mode and accept the standard audio clock and synchronizing signal. The ADATP pin is always input mode regardless of operating mode. One of audio data in left or right channel should be selected for playback audio by the PB_LRSEL. |
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