TAS5504 datasheet(79/96 Pages) TI

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Serial Control Interface Register Definitions

SLES123 − October 2004

TAS5504

Each gain coefficient is in 28-bit (5.23) format so 0x800000 is a gain of 1. Each gain coefficient is written as

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

Table 6−19. Contents of One 20-Byte Biquad Filter Register Format (Default = All-pass)

DESCRIPTION

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

0x00, 0x80, 0x00, 0x00

b1 Coefficient

U (31:28), b1 (27:24), b1 (23:16), b1 (15:8), b1 (7:0)

0.0

0x00, 0x00, 0x00, 0x00

b2 Coefficient

U (31:28), b2 (27:24), b2 (23:16), b2 (15:8), b2 (7:0)

0.0

0x00, 0x00, 0x00, 0x00

a1 Coefficient

U (31:28), a1 (27:24), a1 (23:16), a1 (15:8), a1 (7:0)

0.0

0x00, 0x00, 0x00, 0x00

a2 Coefficient

U (31:28), a2 (27:24), a2 (23:16), a2 (15:8), a2 (7:0)

0.0

0x00, 0x00, 0x00, 0x00

6.18 Bass and Treble Bypass Register (0x89 – 0x90, Channels 1 − 4)

Channels 1, 2, 3, and 4 are mapped into registers 0x89, 0x8A, 0x8F, and 0x90. Eight bytes are written for each

channel. Each gain coefficient is in 28-bit (5.23) format so 0x800000 is a gain of 1. Each gain coefficient is

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

Table 6−20. Bass and Treble Bypass Register Format (0x89−0x90)

TOTAL BYTES

CONTENTS

INITIALIZATION VALUE

Channel bass and

treble bypass

U 31:28), Bypass (27:24), Bypass (23:16), Bypass (15:8), Bypass (7:0)

0x00, 0x80, 0x00, 0x00

Channel bass and

treble inline

U (31:28), Inline (27:24), Inline (23:16), Inline (15:8), Inline (7:0)

0x00, 0x00, 0x00, 0x00

6.19 Loudness Registers (0x91 – 0x95)

Table 6−21. Loudness Registers Format (0x91 – 0x95)

I2C

SUBADDRESS

TOTAL

BYTES

DESCRIPTION OF CONTENTS

DEFAULT STATE

0x91

Loudness Log2 Gain (LG)

U (31:28), LG (27:24), LG (23:16), LG (15:8), LG

(7:0)

0xFF, 0xC0, 0x00, 0x00

0x92

Loudness Log2 Offset

(LO)

U (31:24), U (23:16), LO (15:8), LO (7:0)

0x00, 0x00, 0x00, 0x00,

0x92

Loudness Log2 LO

LO (31:24), LO (23:16), LO (15:8), LO (7:0)

0x00, 0x00, 0x00, 0x00,

0x93

Loudness Gain (G)

U (31:28), G (27:24), G (23:16), G (15:8), G (7:0)

0x00, 0x00, 0x00, 0x00,

0x94

Loudness Offset Upper 16

bits (O)

U (31:24), U (23:16), O (15:8), O (7:0)

0x00, 0x00, 0x00, 0x00,

0x94

Loudness O Offset Lower

32 bits (O)

O (31:24), O (23:16), O (15:8), O (7:0)

0x00, 0x00, 0x00, 0x00,

Loudness Biquad (b0)

U (31:28), b0 (27:24), b0 (23:16), b0 (15:8), b0 (7:0)

0x00, 0x00, 0xD5, 0x13,

Loudness Biquad (b1)

U (31:28), b1 (27:24), b1 (23:16), b1 (15:8), b1 (7:0)

0x00, 0x00, 0x00, 0x00,

0x95

Loudness Biquad (b2)

U (31:28), b2 (27:24), b2 (23:16), b2 (15:8), b2 (7:0)

0x0F, 0xFF, 0x2A, 0xED,

0x95

Loudness Biquad (a1)

U (31:28), a1 (27:24), a1 (23:16), a1 (15:8), a1 (7:0)

0x00, 0xFE, 0x50, 0x45,

Loudness Biquad (a2)

U (31:28), a2 (27:24), a2 (23:16), a2 (15:8), a2 (7:0)

0x0F, 0x81, 0xAA, 0x27

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