TAS5558 datasheet(9/122 Pages) TI

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TAS5558

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SLES273A – APRIL 2013 – REVISED JUNE 2013

The I2C supports a special mode which permits I2C write operations to be broken up into multiple data-

write operations that are multiples of 4 data bytes. These are 6-byte, 10-byte, 14-byte, 18-byte, etc., write

operations that are composed of a device address, read/write bit, subaddress, and any multiple of 4 bytes

of data. This permits the system to incrementally write large register values with multiple 4 byte transfers.

I2C transactions. In order to use this feature, the first block of data is written to the target I2C address, and

each subsequent block of data is written to a special append register (0xFE) until all the data is written

and a stop bit is sent. An incremental read operation is not supported using 0xFE.

2.4.5

Device Control

The control section provides the control and sequencing for the TAS5558. The device control provides

both high- and low-level control for the serial control interface, clock and serial data interfaces, digital

audio processor, and pulse-width modulator sections.

2.4.6

Energy Manager

Energy Manager monitors the overall energy (power) in the system. It can be programmed to monitor the

energy of all channels or satellite and sub separately. The output of energy manager, all called EMO, is a

flag that is set when the energy level crosses above the programmed threshold. This level is indicated in

internal status registers as well as in pin output.

2.4.7

Digital Audio Processor (DAP)

The DAP arithmetic unit is used to implement all audio-processing functions: soft volume, loudness

compensation, bass and treble processing, dynamic range control, channel filtering, and input and output

mixing. Figure 3-1 shows the TAS5558 DAP architecture.

2.4.7.1

TAS5558 Audio-Processing Configurations

The 32-kHz to 96-kHz configuration supports eight channels of data processing that can be configured

either as eight channels, or as six channels with two channels for separate stereo line outputs. All data is

SRC'd to 96kHz in this mode, and processed in the DAP at 96kHz.

The 176.4-kHz to 192-kHz configuration supports four channels of signal processing with two channels

passed through (or derived from the three processed channels).

To support efficiently the processing requirements of both multichannel 32-kHz to 96-kHz data and the 6-

channel 176.4-kHz and 192-kHz data, the TAS5558 has separate audio-processing features for 32-kHz to

96-kHz data rates and for 176.4 kHz and 192 kHz. See Table 2-2 for a summary of TAS5558 processing

feature sets.

Device Information

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TAS5558 Datasheet(PDF) 9 Page - Texas Instruments