DIT4096

19

SBOS225A

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INPUT

FUNCTION

MONO

Stereo/Mono Mode Selection

MONO

Status

0

Stereo Mode

1

Mono Mode

MDAT

Mono Mode Audio and Channel Status Data Selection

MDAT

Status

0

Source is Left Channel for Audio data, and Channel A for CS data.

1

Source is Right Channel for Audio data, and Channel B for CS data.

TABLE IX. Mono Mode Configuration Settings for Hardware Mode Operation.

Dual-Wire operation requires that each DIT4096 operates in

Mono mode, which is supported in both Software and Hardware

control modes. In Mono mode, the DIT4096 transmits two

consecutive samples of a single channel for both the Channel

A and Channel B sub-frames, effectively doubling the sampling

rate. The audio serial port channel used for sampling audio and

channel status data is selectable in both Software and Hard-

ware control modes.

In Software mode, the MONO, MDAT, and MCSD bits in control

source channel for audio and channel status data. Refer to the

register definition for details regarding the setting of these bits.

In Hardware mode, the MONO (pin 21) and MDAT (pin 20)

inputs are used to enable mono mode, as well as selecting

the source channel for audio and channel status data.

Table IX shows the available options for MONO and MDAT

selection. Figure 15 illustrates a simple Hardware mode

configuration for implementing Dual-Channel operation using

two DIT4096 transmitters.

SCLK

SYNC

SDATA

M/S

11

12

13

14

13

12

11

14

TX+

TX–

Right

Channel

Output

Output

Circuit

(See Figs. 12-14)

SDATA

SYNC

SCLK

M/S

TX+

TX–

Left

Channel

Output

Output

Circuit

(See Figs. 12-14)

DIT4096

DIT4096

PCM1804

DATA

LRCK

BCK

Master Clock

Generator

To All Devices

18

17

18

17

V

IO

21

20

MONO

MDAT

MONO

MDAT

V

IO

21

20

NOTE: To simplify the drawing, not all pins are shown here.

FIGURE 15. Hardware Mode Example for Dual-Channel Transmitter Operation.