Datasheet

DIT4096
19
SBOS225A
www.ti.com
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
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 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.