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WM8994ECS/R 数据表(PDF) 167 Page - Cirrus Logic

部件名 WM8994ECS/R
功能描述  Multi-channel Audio Hub CODEC for Smartphones
PDF  363 Pages
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制造商  CIRRUS [Cirrus Logic]
网页  http://www.cirrus.com
标志 CIRRUS - Cirrus Logic

WM8994ECS/R 数据表(HTML) 167 Page - Cirrus Logic

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WM8994
Rev 4.6
167
Time Division Multiplexing (TDM) is available in all four data format modes. On AIF1, the WM8994
can transmit and receive data on two stereo pairs of timeslots simultaneously. On AIF2, the applicable
timeslot pair is selectable using register control bits.
Two variants of DSP mode are supported -
‘Mode A’ and ‘Mode B’. Mono operation can be selected
on either audio interface in both DSP modes. PCM operation is supported using the DSP mode.
MASTER AND SLAVE MODE OPERATION
The WM8994 digital audio interfaces can operate as a master or slave as shown in Figure 45 and
Figure 46.
The associated control bits are described in “Digital Audio Interface Control”.
WM8994
ADCDAT
LRCLK
DACDAT
BCLK
Processor
WM8994
Processor
ADCDAT
LRCLK
DACDAT
BCLK
Figure 45 Master Mode
Figure 46 Slave Mode
OPERATION WITH TDM
Time division multiplexing (TDM) allows multiple devices to transfer data simultaneously on the same
bus. The WM8994 ADCs and DACs support TDM in master and slave modes for all data formats and
word lengths. TDM is enabled and configured using register bits defined i
n the “Digital Audio Interface
Control
” section.
WM8994
Processor
WM8994 or
Similar
CODEC
ADCDAT
ADCLRC
DACDAT
BCLK
ADCDAT
ADCLRC
DACDAT
BCLK
WM8994
Processor
WM8994 or
Similar
CODEC
ADCDAT
ADCLRC
DACDAT
BCLK
ADCDAT
ADCLRC
DACDAT
BCLK
Figure 47 TDM with WM8994 as Master
Figure 48 TDM with Other CODEC as Master



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