MAX98090BEWJ+T Maxim Integrated, MAX98090BEWJ+T Datasheet - Page 107

• Manufacturer Part Number: MAX98090BEWJ+T
• Description: Interface - CODECs 5V 130mW Stereo Headphone Amp
• Manufacturer: Maxim Integrated

MAX98090
DAI Digital Audio Data Path Control
and Routing
The digital audio data path section supports a variety of
stereo data path configurations and formats (Figure 17).
The standard configuration is to route either the record
path digital audio output to the serial data output (record
path to SDOUT) or to route the serial data input to the dig-
ital audio playback path (SDIN to playback path). These
two primary configurations can be used either individually
or together as needed by the application.
The DAI data path also supports two loop configurations.
Loop back mode takes the digital audio serial data input
and routes it back to the serial data output (SDIN to
SDOUT). Loop through mode allows the record path audio
data output to be looped through to the digital audio play-
back path (and can be combined with the record path to
SDOUT configuration if desired). The configuration settings
Figure 17. DAI Digital Data Path Configuration
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PCLK
GENERATION
PRESCALED
CLOCK
DIGITAL MIC CLOCK
CONFIGURATION
MCLK
DAI: CLOCK CONTROL
AND CONFIGURATION
PSCLK[1:0]
FREQ[3:0]
CLOCK
FRAME
PLL AND CLOCK GENERATION
LRCLK
USE_MI
MI[14:0]
NI[14:0]
MAS
BCI
WCI
TO ADC CLOCK
GENERATION
BSEL[2:0]
CLOCK
BIT
RECORD PATH DSP
BCLK
MAX98090
for all valid data path combinations are detailed in
Table 44 and are illustrated in Figure 18.
SDOUT can be configured to go to either a high imped-
ance state or to drive a valid logic level (LSB) after all
data bits have been transmitted. When high impedance
mode is enabled, SDOUT goes to a high-impedance state
quickly after the BCLK edge for the LSB occurs to avoid
potential bus contention. SDIN/loopthrough audio data
can be routed through the playback path input mixer as
either stereo audio data, or as a mono representation of
the input audio data. By default, playback mono mode is
disabled and the left/right input audio data is routed to
the left/right playback channels respectively. If playback
mono mode is enabled, the input audio data channels are
reduced in amplitude by 6dB, mixed together (summed),
and then routed to both the left and right record path
channels. The full list of DAI data path configuration con-
trol bits are detailed in Table 45.
L/R AUDIO
OUTPUT
Ultra-Low Power Stereo Audio Codec
OUTPUT SHIFT
DATA OUTPUT
BACK MUX
REGISTER
0
ENABLE
LOOP
SDOUT
1
DAI: DATA PATH
TO DAC CLOCK
GENERATION
LBEN
SLOTDLY[3:0]
SLOTL/R[1:0]
TDM, FSW
SDOEN
HIZOFF
RJ, DLY
WS[1:0]
DMONO
SDIEN
PLAYBACK PATH DSP
LTEN
1
INPUT MIXER
INPUT SHIFT
DATA INPUT
REGISTER
THROUGH
PLAYBACK
ENABLE
Maxim Integrated │ 107
LOOP
MUX
L/R AUDIO
INPUT
SDIN
0