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TAS5721 Datasheet(PDF) 47 Page - Texas Instruments

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Part # TAS5721
Description  Digital Audio Power Amplifier With EQ, DRC, 2.1 Support, and Headphone/Line Driver
PDF  78 Pages
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

TAS5721 Datasheet(HTML) 47 Page - Texas Instruments

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47
TAS5721
www.ti.com
SLOS739A – JULY 2012 – REVISED MARCH 2016
Product Folder Links: TAS5721
Submit Documentation Feedback
Copyright © 2012–2016, Texas Instruments Incorporated
(1)
Default values are in bold.
9.6.8 Volume Registers (0x07, 0x08, 0x09, 0x0A)
Step size is 0.5 dB
Master volume
– 0x07 (default is mute)
Channel-1 volume
– 0x08 (default is 0 dB)
Channel-2 volume
– 0x09 (default is 0 dB)
Channel-3 volume
– 0x0A (default is 0 dB)
Table 12. Volume Registers (0x07, 0x08, 0x09, 0x0A)
D7
D6
D5
D4
D3
D2
D1
D0
FUNCTION
0
0
0
0
0
0
0
0
24 dB
0
0
1
1
0
0
0
0
0 dB (default for individual channel volume) (1)
1
1
1
1
1
1
1
0
–103 dB
1
1
1
1
1
1
1
1
Soft mute (default for the master volume) (1)
(1)
Default values are in bold.
(2)
Bits 6:5 can be changed only when volume is in MUTE [master volume = MUTE (register 0x07 = 0xFF)].
9.6.9 Volume Configuration Register (0x0E)
Bits
D2–D0:
Volume slew rate (Used to control volume change and MUTE ramp rates). These bits control the
number of steps in a volume ramp. Volume steps occur at a rate that depends on the sample rate of
the I2S data as follows:
Sample Rate (KHz)
Approximate Ramp Rate
8/16/32
125 us/step
11.025/22.05/44.1
90.7 us/step
12/24/48
83.3 us/step
Table 13. Volume Control Register (0x0E)
D7
D6
D5
D4
D3
D2
D1
D0
FUNCTION
1
–
–
1
0
–
–
–
Reserved (1)
–
0
–
–
–
–
–
–
Subchannel (ch4) volume = ch1 volume(2)(1)
–
1
–
–
–
–
–
–
Subchannel volume = register 0x0A(2)
–
–
0
–
–
–
–
–
Ch3 volume = ch2 volume(1)
–
–
1
–
–
–
–
–
Ch3 volume = register 0x0A
–
–
–
–
–
0
0
0
Volume slew 512 steps (43-ms volume ramp time at 48 kHz)
–
–
–
–
–
0
0
1
Volume slew 1024 steps (85-ms volume ramp time at 48 kHz) (1)
–
–
–
–
–
0
1
0
Volume slew 2048 steps (171- ms volume ramp time at 48 kHz)
–
–
–
–
–
0
1
1
Volume slew 256 steps (21-ms volume ramp time at 48 kHz)
–
–
–
–
–
1
X
X
Reserved



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