TAS5705
www.ti.com ...................................................................................................................................................................................................... SLOS549–JUNE 2008
VOLUME REGISTERS (0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D)
Step size is 0.5 dB.
Master volume
– 0x07 (default is mute)
– 0x08 (default is 0 dB)
– 0x09 (default is 0 dB)
– 0x0A (default is 0 dB)
– 0x0B (default is 0 dB)
– 0x0C (default is 0 dB)
– 0x0D (default is 0 dB)
Channel-1 volume
Channel-2 volume
Channel-3 volume
Channel-4 volume
Headphone volume
Channel-6 volume
(subwoofer)
Table 15. Volume Register
D7
0
D6
0
D5
0
D4
0
D3
0
D2
0
D1
0
D0
FUNCTION
0
24 dB
(1)
0
0
1
1
0
0
0
0
0 dB (default for individual channel volume)
1
1
1
1
1
1
1
0
–100 dB
(1)
1
1
1
1
1
1
1
1
MUTE (default for master volume); 50% duty cycle at output – SOFT MUTE
(1) Default values are in bold.
VOLUME CONFIGURATION REGISTER (0x0E)
Bit D7:
Bit D6:
Reserved = 1
If 0, then biquad 1 (BQ1) volume compensation part only is disabled (default). If 1, then BQ1
volume compensation is enabled.
Bit D4:
Reserved = 1
Bit D3:
Reserved
Bits D2–D0:
Volume slew rate (Used to control volume change and MUTE ramp rates)
Table 16. Volume Control Register (0x0E)
D7
1
D6
–
D5
–
D4
–
D3
–
D2
–
D1
–
D0
–
FUNCTION
Reserved (must be 1)
(1)
–
0
–
–
–
–
–
–
Disable biquad volume compensation
–
1
–
–
–
–
–
–
Enable biquad volume compensation
(1)
–
–
0
–
–
–
–
–
Reserved
(1)
–
–
–
1
–
–
–
–
Reserved (must be 1)
(1)
–
–
–
–
0
–
–
–
Reserved
–
–
–
–
–
0
0
0
Volume slew 512 steps (44 ms volume ramp time)
Volume slew 1024 steps(1) (88 ms volume ramp time)
Volume slew 2048 steps (176 ms volume ramp time)
Volume slew 256 steps (22 ms volume ramp time)
Reserved
–
–
–
–
–
0
0
1
–
–
–
–
–
0
1
0
–
–
–
–
–
0
1
1
–
–
–
–
–
1
X
X
(1) Default values are in bold.
Copyright © 2008, Texas Instruments Incorporated
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