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TAS5721 Datasheet(PDF) 38 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) 38 Page - Texas Instruments

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background image
u
Coefficient
Digit8
u u u
u u S x
Coefficient
Digit7
x.
x
x
x
Coefficient
Digit6
x
x
x
x
Coefficient
Digit5
x
x
x
x
Coefficient
Digit4
x
x
x
x
Coefficient
Digit3
x
x
x
x
Coefficient
Digit2
x
x
x
x
Coefficient
Digit1
Fraction
Digit5
Fraction
Digit4
Fraction
Digit3
Fraction
Digit2
Fraction
Digit1
Integer
Digit1
Sign
Bit
Fraction
Digit6
u=unusedordon’tcarebits
Digit=hexadecimaldigit
M0127-01
0
38
TAS5721
SLOS739A – JULY 2012 – REVISED MARCH 2016
www.ti.com
Product Folder Links: TAS5721
Submit Documentation Feedback
Copyright © 2012–2016, Texas Instruments Incorporated
Programming (continued)
Figure 70. Alignment of 3.23 Coefficient in 32-Bit I2C Word
Table 2. Sample Calculation for 3.23 Format
dB
LINEAR
DECIMAL
HEX (3.23
FORMAT)
0
1
8,388,608
0080 0000
5
1.7782794
14,917,288
00E3 9EA8
–5
0.5623413
4,717,260
0047 FACC
X
L = 10(X/20)
D = 8,388,608 × L
H = dec2hex (D, 8)
Table 3. Sample Calculation for 9.17 Format
dB
LINEAR
DECIMAL
HEX (9.17
FORMAT)
0
1
131,072
2 0000
5
1.77
231,997
3 8A3D
–5
0.56
73,400
1 1EB8
X
L = 10(X/20)
D = 131,072 × L
H = dec2hex (D, 8)
9.6 Register Maps
Table 4. Serial Control Interface Register Summary
SUBADDRESS
REGISTER NAME
NO. OF
BYTES
CONTENTS
DEFAULT
VALUE
A u indicates unused bits.
0x00
Clock control register
1
Description shown in subsequent section
0x6C
0x01
Device ID register
1
Description shown in subsequent section
0x00
0x02
Error status register
1
Description shown in subsequent section
0x00
0x03
System control register 1
1
Description shown in subsequent section
0xA0
0x04
Serial data interface
register
1
Description shown in subsequent section
0x05
0x05
System control register 2
1
Description shown in subsequent section
0x40
0x06
Soft mute register
1
Description shown in subsequent section
0x00
0x07
Master volume
1
Description shown in subsequent section
0xFF (mute)
0x08
Channel 1 vol
1
Description shown in subsequent section
0x30 (0 dB)



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