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PCM1608 Datasheet(PDF) 24 Page - Texas Instruments |
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PCM1608 Datasheet(HTML) 24 Page - Texas Instruments |
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24 / 46 page  www.ti.com PCM1608 SBAS164B – DECEMBER 2000 – REVISED JULY 2005 B15 B14 B13 B12 B11 B10 B9 B8 B7 B6 B5 B4 B3 B2 B1 B0 REGISTER 7 R/W IDX6 IDX5 IDX4 IDX3 IDX2 IDX1 IDX0 RSV RSV MUT6 MUT5 MUT4 MUT3 MUT2 MUT1 REGISTER 18 R/W IDX6 IDX5 IDX4 IDX3 IDX2 IDX1 IDX0 RSV RSV RSV RSV RSV RSV MUT8 MUT7 R/W – Read/Write Mode Select When R/W = 0, a write operation is performed. When R/W = 1, a read operation is performed. Default value: 0 MUTx – Soft Mute Control Where x = 1 through 8, corresponding to the DAC output VOUTx. These bits are read/write. Default value: 0 MUTx = 0 Mute disabled (default) MUTx = 1 Mute enabled The mute bits, MUT1 through MUT8, are used to enable or disable the soft mute function for the corresponding DAC outputs, VOUT1 through VOUT8. The soft mute function is incorporated into the digital attenuators. When mute is disabled (MUTx = 0), the attenuator and DAC operate normally. When mute is enabled by setting MUTx = 1, the digital attenuator for the corresponding output is decreased from the current setting to the infinite attenuation setting, one attenuator step (0.5 dB) at a time. This provides a quiet, pop-free muting of the DAC output. On returning from soft mute, by setting MUTx = 0, the attenuator is increased one step at a time to the previously programmed attenuation level. B15 B14 B13 B12 B11 B10 B9 B8 B7 B6 B5 B4 B3 B2 B1 B0 REGISTER 8 R/W IDX6 IDX5 IDX4 IDX3 IDX2 IDX1 IDX0 RSV RSV DAC6 DAC5 DAC4 DAC3 DAC2 DAC1 REGISTER 19 R/W IDX6 IDX5 IDX4 IDX3 IDX2 IDX1 IDX0 RSV RSV RSV RSV RSV RSV DAC8 DAC7 R/W – Read/Write Mode Select When R/W = 0, a write operation is performed. When R/W = 1, a read operation is performed. Default value: 0 DACx – DAC Operation Control Where x = 1 through 8, corresponding to the DAC output VOUTx. These bits are read/write. Default value: 0 DACx = 0 DAC operation enabled (default) DACx = 1 DAC operation disabled The DAC operation controls are used to enable and disable the DAC outputs, VOUT1 through VOUT8. When DACx = 0, the output amplifier input is connected to the DAC output. When DACx = 1, the output amplifier input is switched to the dc common-mode voltage (VCOM), equal to VCC/2. 24 |
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