DIT4192_15 Datasheet, PDF (19/27 Pages) Texas Instruments – 192kHz Digital Audio Transmitter

Dual-Wire operation requires that each DIT4192 operates in
Mono mode, which is supported in both Software and Hard-
ware control modes. In Mono mode, the DIT4192 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 Hardware control modes.
In Software mode, the MONO, MDAT, and MCSD bits in
control register 01_H are used to select mono mode, as well
as the 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 DIT4192 transmitters.
INPUT
MONO
MDAT
FUNCTION
Stereo/Mono Mode Selection
MONO
0
1
Status
Stereo Mode
Mono Mode
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.
V_IO
ADC
DATA
LRCK
BCK
Master Clock
Generator
21
20
11 _{SCLK MONO MDAT}
12 _SYNC
13 _SDATA ^DIT4192
14 _M/S
TX+ ¹⁸
TX– ¹⁷
Output ^Right
Circuit ^Channel
Output
(See Figs. 12-14)
13
12
11
To All Devices 14
SDATA
SYNC
SCLK
DIT4192
TX+ ¹⁸
TX– ¹⁷
Output ^Left
Circuit ^Channel
Output
M/S _{MONO MDAT}
21
20
(See Figs. 12-14)
V_IO
NOTE: To simplify the drawing, not all pins are shown here.
FIGURE 15. Hardware Mode Example for Dual-Channel Transmitter Operation.
DIT4192
19
SBOS229B
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