Datasheet

Data Sheet ADAU1772
Rev. B | Page 101 of 116
PUSH-BUTTON VOLUME CONTROL ASSIGNMENT REGISTER
Address: 0x0040, Reset: 0x87, Name: PB_VOL_CONV
Table 92. Bit Descriptions for PB_VOL_CONV
Bits Bit Name Settings Description Reset Access
[7:6] GAINSTEP Sets the gain step for each press of the volume control button. 0x2 RW
00 0.375 dB/press
01 1.5 dB/press
10 3.0 dB/press
11 4.5 dB/press
[5:3] RAMPSPEED Sets the speed in dB/sec at which the volume control ramps when a
button is pressed.
0x0 RW
000 60 dB/sec
001 48 dB/sec
010 36 dB/sec
011 30 dB/sec
100 24 dB/sec
101 18 dB/sec
110
12 dB/sec
111 6 dB/sec
[2:0] PB_VOL_CONV_VAL Converters controlled by push-button volume. The push-button volume
control is enabled when these bits are set to something other than the
default setting (111). When set to 111, the push-button volume is
disabled and the converter volumes are set by the ADCx_VOLUME and
DACx_VOLUME registers.
0x7 RW
000 ADC0 and ADC1
001 ADC2 and ADC3
010 All ADCs
011 DAC0 and DAC1
100 DAC0
101 DAC1
110
Reserved
111
None (default)