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SM5846AP Datasheet(PDF) 17 Page - Nippon Precision Circuits Inc |
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SM5846AP Datasheet(HTML) 17 Page - Nippon Precision Circuits Inc |
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17 / 36 page  SM5846AP NIPPON PRECISION CIRCUITS—17 FUNCTIONAL DESCRIPTION Mode Switching and Function Switching The SM5846AP supports several operating modes and function switches. Internal control flags, set by the digital inputs or serial data input signal from a microprocessor, determine the status of those function switches. Mode switching/function switch controls Control request switching MDS input and device control Mode switching/function switching is performed under input pin control when MDS is HIGH, and under internal flag control when MDS is LOW. Stage Name Control request Function Input Control flag System MDS Yes IC control request switch (input pin/control flag) Operating mode switch HS Yes Yes Operating mode switching ASEL2 Yes Yes ASEL1 Yes Yes Clock switch CKS Yes Input clock frequency switching CKEN Yes Crystal oscillator operating control switching Filter switch DEEM Yes Yes Deemphasis ON/OFF switching FSEL2 Yes Deemphasis filter sampling frequency set FSEL1 Yes MUTE Yes Mute ON/OFF control DITH Yes (pos. logic) Yes (neg. logic) Dither ON/OFF control Input interface switch SYNC Yes Yes Jitter-free/sync mode switching LRS Yes LRCI (LR clock) input polarity switching IBS2 Yes Input data length set IBS1 Yes Output interface switch OBS Yes Yes Output data length set MDS1 1. Switching MDS during device operation is prohibited. Control request HIGH Input pins LOW Control flags Input pin functions when MDS is LOW All pins that are part of the microprocessor interface can be used whenever MDS is LOW. Pin name Function Notes HS/MDT Serial data transfer data clock Used for the microprocessor interface ASEL2/MDC K Serial data transfer clock input SYNC/MDLE Serial data transfer latch enable input CKS CKS function switch input Input pin control only because there is no corresponding control flag. CKEN CKEN function switch input LRS LRS function switch input |
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