TAS5709APHPR datasheet(44/61 Pages) TI1

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MASTER FINE VOLUME REGISTER (0x0A)

VOLUME CONFIGURATION REGISTER (0x0E)

TAS5709, TAS5709A

SLOS599A – NOVEMBER 2008 – REVISED SEPTEMBER 2009 ..................................................................................................................................... www.ti.com

This register can be used to provide precision tuning of master volume. If fine master volume is used, output

mixers (0x51 and 0x52) should not be used. Similarly, this feature cannot be used if features like 2-band DRC or

Bass Boost are being used. Write a "1" to bit D7 to enable changes to this register.

Table 11. Master Fine Volume Register (0x0A)

FUNCTION

–

0 dB (1)

–

0.125 dB

–

0.25 dB

–

0.375 dB

–

Write enable bit

–

Ignore Write to register 0X0A

(1)

Default values are in bold.

Bits

Volume slew rate (Used to control volume change and MUTE ramp rates). These bits control the

D2–D0:

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 12. Volume Control Register (0x0E)

FUNCTION

–

Reserved (1)

–

Volume slew 512 steps (43 ms volume ramp time at 48kHz)

–

Volume slew 1024 steps (85 ms volume ramp time at 48kHz) (1)

–

Volume slew 2048 steps (171 ms volume ramp time at 48kHz)

–

Volume slew 256 steps (21ms volume ramp time at 48kHz)

–

Reserved

(1)

Default values are in bold.

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