DIT4192IPWR datasheet(5/22 Pages) TI

5 / 22 page

DIT4192

SBOS229B

www.ti.com

FIGURE 1. Software Mode Block Diagram.

FIGURE 2. Hardware Mode Block Diagram.

GENERAL DESCRIPTION

The DIT4192 is a complete digital audio transmitter, suitable

for both professional and consumer audio applications. Sam-

pling rates up to 192kHz are supported. The DIT4192 com-

plies with the requirements for the AES-3, IEC-60958, and

EIAJ CP1201 interface standards.

Figures 1 and 2 show the block diagrams for the DIT4192

when used in Software and Hardware control modes. The

MODE input (pin 28) determines the control model used to

configure the DIT4192 internal functions. In Software mode,

a serial control port is used to write and read on-chip control

registers and status buffers. In Hardware mode, dedicated

control pins are provided for configuration and status inputs.

The DIT4192 includes an audio serial port, which is used to

interface to standard digital audio sources, such as

Analog-to-Digital (A/D) converters, Digital Signal Processors

(DSPs), and audio decoders. Support for Left-Justified, Right-

Justified, and I2S data formats is provided.

The AES-3 encoder creates a multiplexed bit stream, con-

taining audio, status, and user data. See Figure 3 for the

multiplexed data format. The data is then Bi-Phase Mark

encoded and output to a differential line driver. The line driver

outputs are connected to the transmission medium, be it

cable or fiber optics. In the case of twisted-pair or coaxial

cable, a transformer is commonly used to couple the driver

outputs to the transmission line. This provides both isolation

and improved common-mode rejection. For optical transmis-

sion, the TX+ (pin 18) driver output is connected to an optical

transmitter module. See the Applications Information section

of this data sheet for details regarding output driver circuit

configurations.

Audio

Serial

Port

AES-3 Encoder

Line

Driver

Reset

Logic

Serial Control Interface,

Control Registers,

and Channel Status

Data Buffers

Clock

Generator

RXP

TX+

TX–

MCLK

SYNC

SCLK

SDATA

RST

Control Port

BLS

INT

Audio

Serial

Port

AES-3 Encoder

Line

Driver

Reset

Logic

CUV

Data Buffer

Clock

Generator

TX+

TX–

MCLK

CLK1

BLSM

BLS

MONO

MDAT

CLK0

SYNC

SCLK

SDATA

M/S

FMT0

FMT1

CSS

COPY/C

AUDIO

EMPH

RST

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