Datasheet

ADAU1772 Data Sheet
Rev. B | Page 100 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