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ADAU1772BCPZ-R7 数据表(PDF) 102 Page - Analog Devices |
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ADAU1772BCPZ-R7 数据表(HTML) 102 Page - Analog Devices |
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102 / 117 page  Data Sheet ADAU1772 Rev. C | Page 101 of 116 PUSH-BUTTON VOLUME SETTINGS REGISTER Address: 0x003F, Reset: 0x00, Name: PB_VOL_SET This register must be written before Bits PB_VOL_CONV_VAL are set to something other than the default value. Otherwise, the push- button volume control is initialized to −96 dB. Table 91. Bit Descriptions for PB_VOL_SET Bits Bit Name Settings Description Reset Access [7:3] PB_VOL_INIT_VAL Sets the initial volume of the push-button volume control. Each increment of this register attenuates the level by 1.5 dB, from 0 dB to −46.5 dB. 0x00 RW 00000 0.0 dB 00001 −1.5 dB 11111 −46.5 dB [2:0] HOLD Sets the length of time that the button is held before the volume ramp begins. 0x0 RW 000 150 ms 001 300 ms 010 450 ms 011 600 ms 100 900 ms 101 1200 ms |
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