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PCM1737E/2K.B bảng dữ liệu(PDF) 14 Page - Texas Instruments |
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PCM1737E/2K.B bảng dữ liệu(HTML) 14 Page - Texas Instruments |
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14 / 32 page  ® 14 PCM1737 FUNCTION RESET DEFAULT REGISTER BIT(S) Digital Attenuation Control, 0dB to –63dB in 0.5dB Steps 0dB, No Attenuation 16 and 17 AT1[7:0] Soft Mute Control Mute Disabled 18 MUT[2:0] Digital Attenuation Speed Select 2/fS 18 ATTS Digital Attenuation Control Attenuator Disabled 18 ATLD Infinite Zero Detect Mute Disabled 18 INZD Oversampling Rate Control (64fS or 128fS) 64fS Oversampling 18 OVER DAC Operation Control DAC1 and DAC2 Enabled 19 DAC[2:1] De-Emphasis Function Control De-Emphasis Disabled 19 DM12 De-Emphasis Sample Rate Selection 44.1kHz 19 DMF[2:1] Audio Data Format Control 24-Bit Standard Format 20 FMT[2:0] CLKO Output Enable CLKO Enabled 20 CLKE CLKO Frequency Selection Full Rate (= fSCLK) 20 CLKD Digital Filter Roll-Off Control Sharp Roll-Off 20 FLT[1:0] 4x/8x Digital Interpolation Control 8x Interpolation 20 X4DS Read Register Index Control REG[6:0] = 01H 21 REG[6:0] Read Auto-Increment Control Auto-Increment Disabled 21 INC TABLE II. User-Programmable Mode Controls. TABLE III. Mode Control Register Map. B15 B14 B13 B12 B11 B10 B9 B8 B7 B6 B5 B4 B3 B2 B1 B0 Register 16 R/W IDX6 IDX5 IDX4 IDX3 IDX2 IDX1 IDX0 AT17 AT16 AT15 AT14 AT13 AT12 AT11 AT10 Register 17 R/W IDX6 IDX5 IDX4 IDX3 IDX2 IDX1 IDX0 AT27 AT26 AT25 AT24 AT23 AT22 AT21 AT20 Register 18 R/W IDX6 IDX5 IDX4 IDX3 IDX2 IDX1 IDX0 res OVER res INZD ATLD ATTS MUT2 MUT1 Register 19 R/W IDX6 IDX5 IDX4 IDX3 IDX2 IDX1 IDX0 res DMF1 DMF0 DM12 res res DAC2 DAC1 Register 20 R/W IDX6 IDX5 IDX4 IDX3 IDX2 IDX1 IDX0 X4DS FLT1 FLT0 CLKD CLKE FMT2 FMT1 FMT0 Register 21 R/W IDX6 IDX5 IDX4 IDX3 IDX2 IDX1 IDX0 INC REG6 REG5 REG4 REG3 REG2 REG1 REG0 MODE CONTROL REGISTERS User-Programmable Mode Controls The PCM1737 includes a number of user programmable functions which are accessed via control registers. The registers are programmed using the Serial Control Interface which was previously discussed in this data sheet. Table II lists the available mode control functions, along with their reset default conditions and associated register index. Register Map The mode control register map is shown in Table IV. Each register includes a R/W bit, which determines whether a register read (R/W =1) or write (R/W = 0) operation is performed. Each register also includes an index (or address) indicated by the IDX[6:0] bits. |
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