323
Table 34. Volume Adjust Gain Coefficient (Continued)
GAIN (dB)
GAIN (FLOAT)
GAIN (COEFFICIENT)
GAIN (dB)
GAIN (GLOAT)
GAIN (COEFFICIENT)
95
1.77828E05
00000095
122.5
7.49894E07
00000006
95.5
1.67880E05
0000008C
123
7.07946E07
00000005
96
1.58489E05
00000084
123.5
6.68344E07
00000005
96.5
1.49624E06
0000007D
124
6.30958E07
00000005
97
1.41254E05
00000076
124.5
5.95662E07
00000004
97.5
1.33352E05
0000006F
125
5.62342E07
00000004
98
1.25893E05
00000069
125.5
5.30884E07
00000004
98.5
1.18850E05
00000063
126
5.01188E07
00000004
99
1.12202E05
0000005E
126.5
4.73152E07
00000003
99.5
1.05925E05
00000058
127
4.46684E07
00000003
100
0.00001
00000053
127.5
4.21696E07
00000003
100.5
9.44060E06
0000004F
128
3.98108E07
00000003
114
1.99526E06
00000010
128.5
3.75838E07
00000003
114.5
1.88365E06
0000000F
129
3.54814E07
00000002
115
1.77828E06
0000000E
129.5
3.34966E07
00000002
115.5
1.67880E06
0000000E
130
3.16228E07
00000002
116
1.58489E06
0000000D
130.5
2.98538E07
00000002
116.5
1.49624E06
0000000C
131
2.81838E07
00000002
117
1.41254E06
0000000B
131.5
2.66072E07
00000002
117.5
1.33352E06
0000000B
132
2.51188E07
00000002
118
1.25893E06
0000000A
132.5
2.37138E07
00000001
118.5
1.18850E06
00000009
133
2.23872E07
00000001
119
1.12202E06
00000009
133.5
2.11348E07
00000001
119.5
1.05925E06
00000008
134
1.99526E07
00000001
120
0.000001
00000008
134.5
1.88365E07
00000001
120.5
9.44080E07
00000007
135
1.77828E07
00000001
121
8.91250E07
00000007
135.5
1.67880E07
00000001
121.5
8.41396E07
00000007
136
1.58489E07
00000001
122
7.94328E07
00000006
3.6.1.1 Soft Volume Adjustment Range Limitations
When the 2048 sample transition time is selected for the S-curve volume transition, the full
∞ to 24-dB adjustment
range is available. All possible values but one in the signed 28-bit (5.23 format) volume level command range are
valid volume level selections. The one exception is the maximum negative volume level command 0x08000000. This
value is illegal and if used, could result in erratic behavior that requires a reset to the part to correct.
When the 4096 sample transition time is selected, the upper two bits of the 28-bit volume command cannot be used.
This means that the valid volume level command range is reduced to a maximum positive value of 0x1FFFFFF
(12 dB) and a maximum negative value of 0x0E000000 (also 12 dB, but with a 180
° phase inversion of the audio
signal). Values above these maximum levels could result in erratic behavior that requires a reset to the part to correct.
Although the volume boost for the 4096 sample transition time is limited to 12 dB, volume boost can be realized
elsewhere in the processing signal flow, such as in the input crossbar mixers, the biquad filters in the three monaural
channels, or the biquad filters in the effects block.
3.6.1.2 Soft Volume Transitions and Concurrent I2C Read Transactions
I2C read transactions at subaddresses 0x01 through 0xD1 are not allowed during volume level transitions, as read
activity during volume level transitions could result in erroneous data being output. If it is required to read subaddress