TAS5548DCAR datasheet(73/116 Pages) TI1

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TAS5548

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SLES270A – NOVEMBER 2012 – REVISED APRIL 2015

Each gain coefficient is in 28-bit (5.23) format, so 0x80 0000 is a gain of 1. Each gain coefficient is written as a

32-bit word with the upper four bits not used.

Table 40. Contents of One 20-Byte Biquad Filter Register (Default = All-Pass)

DEFAULT GAIN COEFFICIENT VALUES

DESCRIPTION

DECIMAL

HEX

b0 coefficient

u[31:28], b0[27:24], b0[23:16], b0[15:8], b0[7:0]

1.0

0080 0000

b1 coefficient

u[31:28], b1[27:24], b1[23:16], b1[15:8], b1[7:0]

0.0

0000 0000

b2 coefficient

u[31:28], b2[27:24], b2[23:16], b2[15:8], b2[7:0]

0.0

0000 0000

a1 coefficient

u[31:28], a1[27:24], a1[23:16], a1[15:8], a1[7:0]

0.0

0000 0000

a2 coefficient

u[31:28], a2[27:24], a2[23:16], a2[15:8], a2[7:0]

0.0

0000 0000

7.6.2.23 Bass and Treble Register, Channels 1–8 (0x89–0x90)

Channels 1, 2, 3, 4, 5, 6, 7, and 8 are mapped into registers 0x89, 0x8A, 0x8B, 0x8C, 0x8D, 0x8E, 0x8F, and

0x90, respectively. Eight bytes are written for each channel. Each gain coefficient is in 28-bit (5.23) format, so

0x80 0000 is a gain of 1. Each gain coefficient is written as a 32-bit word with the upper four bits reserved.

Table 41. Channel 1–8 Bass and Treble Bypass Register Format

TOTAL

CONTENTS

DEFAULT VALUE

NAME

BYTES

Channel bass and

Bypass

0080 0000

treble bypass

Channel bass and

Inline

0000 0000

treble inline

7.6.2.24 Loudness Registers (0x91–0x95)

Table 42. Loudness Register Format

I2C SUB-

TOTAL

DESCRIPTION OF CONTENTS

DEFAULT STATE

BYTES

ADDRESS

0x91

Loudness Log2 gain (LG)

u[31:28], LG[27:24], LG[23:16], LG[15:8], LG[7:0]

0FC0 0000

0x92

Loudness Log2 offset (LO)

LO[31:24], LO[23:16], LO[15:8], LO[7:0]

0000 0000

0x93

Loudness gain (G)

u[31:28], G[27:24], G[23:16], G[15:8], G[7:0]

0000 0000

Loudness offset lower 32 bits

O[31:24], O[23:16], O[15:8], O[7:0]

0000 0000

0x94

(O)

Loudness biquad (b0)

u[31:28], b0[27:24], b0[23:16], b0[15:8], b0[7:0]

00FE 5045

Loudness biquad (b1)

u[31:28], b1[27:24], b1[23:16], b1[15:8], b1[7:0]

0F81 AA27

0x95

Loudness biquad (b2)

u[31:28], b2[27:24], b2[23:16], b2[15:8], b2[7:0]

0000 D513

Loudness biquad (a1)

u[31:28], a1[27:24], a1[23:16], a1[15:8], a1[7:0]

0000 0000

Loudness biquad (a2)

u[31:28], a2[27:24], a2[23:16], a2[15:8], a2[7:0]

0FFF 2AED

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