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LC78856M Fiches technique(PDF) 5 Page - Sanyo Semicon Device |
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LC78856M Fiches technique(HTML) 5 Page - Sanyo Semicon Device |
5 / 8 page No. 5128-5/8 LC78856M, 78856V Pin Functions SSOP MFP Symbol Function 1 1 RSTB Reset input (A low-level input resets the LSI internal circuits.) 2 2 CNT1 Emphasis on/off switching input 3 3 CNT2 Standard speed/double speed switching input 4 4 CNT3 Soft mute input 5 5 BCLK Bit clock input 6 6 LRCK LR clock input 7 7 DATA Digital audio data input 10 8 MODE Input format setting 11 9 CKO Clock output 12 10 XVDD Oscillator amplifier power supply 13 11 XIN Oscillator amplifier input 14 12 XOUT Oscillator amplifier output 15 13 XGND Oscillator amplifier ground 16 14 DGND Digital system ground 17 15 MRO Right channel mute signal output 18 16 TEST Test pin (Must be tied low in normal operation.) 19 17 AVDD4 Analog system power supply 20 18 OUTRA Right channel output A 21 19 AGND2 Analog system ground 22 20 OUTRB Right channel output B 23 21 AVDD3 Analog system power supply 24 22 AVDD2 Analog system power supply 25 23 OUTLB Left channel output B 26 24 AGND1 Analog system ground 27 25 OUTLA Left channel output A 28 26 AVDD1 Analog system power supply 29 27 MLO Left channel mute signal output 30 28 DVDD Digital system power supply Operating Description The LC78856M and LC78856V internal circuits can be roughly divided into the digital filter block and the 1-bit D/A converter block. [Digital Filter Block] 1. Standard Speed The LC78856M and LC78856V implements 8 × oversampling using three FIR filters: a 43rd-order filter, an 11th- order filter, and a 3rd-order filter. A 1st-order IIR filter is used for de-emphasis. 2. Double Speed Double-speed playback is used, for example, for dubbing CDs to audio tape at double speed. Here, the same frequency is used for XIN, but BCLK, LRCK and DATA are input at twice the rates used in standard-speed playback. After de-emphasis is applied with a 1st-order IIR filter, the signal is 4 × oversampled using a 43rd-order FIR filter and a 3rd-order FIR filter. |
Numéro de pièce similaire - LC78856M |
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Description similaire - LC78856M |
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