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SM5846AP датащи(PDF) 23 Page - Nippon Precision Circuits Inc |
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SM5846AP датащи(HTML) 23 Page - Nippon Precision Circuits Inc |
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23 / 36 page ![]() SM5846AP NIPPON PRECISION CIRCUITS—23 Audio ICs Audio Data Input Interface Serial data transmission is used for the digital audio data input. The data has the following format: s 16/20/24/32-bit data length s Alternating left/right-channel serial data transmis- sion s MSB first s Rear packed s 2s complement for negative values Audio data input interface schematic 32bit SIPO Shiftregister 32bitRegister Left channel Input Data Buffer Right channel Input Data Buffer Right channel Input Data Left channel Input Data 32bitRegister DIN BCKI D Q D Q D Q LRCI LRS C C C Audio data input interface pins Audio data is input using pins LRCI, BCKI, and DIN. The LRCI input polarity is determined by pin LRS. Serial data on DIN is input to the serial-to-parallel shift register on the falling edge of the bit transfer clock BCKI. The parallel data is then stored in the left/right-channel input buffers on the HIGH/LOW- level pulse of the LRCI latch clock signal, depend- ing on the selected polarity of the LRCI clock. Pin name Function LRCI Left/right-channel latch clock input BCKI Bit transfer clock input DIN Serial data input LRS LRCI input polarity switch |
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