TAS5548DCAR datasheet(91/116 Pages) TI1

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TAS5548

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SLES270A – NOVEMBER 2012 – REVISED APRIL 2015

7.6.2.42 PSVC Range Register (0xDF)

Bits D31–D2 are zero.

Table 76. PSVC Range Register Format

D31–D2

FUNCTION

12.04-dB control range for PSVC

18.06-dB control range for PSVC

24.08-dB control range for PSVC

Ignore – retain last value

7.6.2.43 General Control Register (0xE0)

Bits D31–D4 are zero. Bit D0 is reserved.

Table 77. General Control Register Format

D31–D4

FUNCTION

–

Normal

–

Lineout/6 Channel mode (6Channels will be pwm processed)

–

Power Supply Volume Control Disable

–

Power Supply Volume Control Enable

–

Subwoofer Part of PSVC

–

Subwoofer Separate from PSVC

7.6.2.44 96kHz Dolby Downmix Coefficients (0xE3 to 0xE8)

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. For eight gain coefficients, the total is 32 bytes.

Table 78. 96kHz Dolby Downmix Coefficients

I2C

DEFAULT

TOTAL

DESCRIPTION OF CONTENTS

BYTES

SUBADDRESS

Fields

STATE

0xE3

dolby_COEF1L_ 96kHz SDIN1-left to SDOUT-left down-mix coefficient (default =

00 29 03 33

96k

1/3.121) . This is also the coefficient for SDIN1-right to SDOUT-right.

0xE4

dolby_COEF1R

96kHz SDIN4-left to SDOUT-left down-mix coefficient. This is also the

00 1C FE EF

_96k

coefficient for SDIN4-left to SDOUT-right.

0xE5

TBD

96kHz SDIN2-left to SDOUT-right down-mix coefficient.

FF E3 01 11

0xE6

TBD

96kHz SDIN2-right to SDOUT-right down-mix coefficient.

FF E3 01 11

0xE7

TBD

96kHz SDIN2-left to SDOUT-left down-mix coefficient.

FF E3 01 11

0xE8

TBD

96kHz SDIN2-right to SDOUT-left down-mix coefficient.

FF E3 01 11

7.6.2.45 THD Manager Configuration (0xE9 and 0xEA)

0xE9 (4B) THD Manager (pre) - provide boost if desired to clip

0xEA (4B) THD Manager (post) - cut clipping signal to final level

Both registers have a 5.23 register format (28bit coefficient)

Valid register values 0000 0000 to 0FFF FFFF

Writes to upper byte is ignored

0dB default value 0080 0000

max positive value 07 FF FFFF = +24dB

negative values 08xx xxxx will invert the signal amplitude

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