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WM8912 Datasheet(PDF) 54 Page - Cirrus Logic

Part # WM8912
Description  Ultra Low Power DAC with Headphone Driver
PDF  129 Pages
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Manufacturer  CIRRUS [Cirrus Logic]
Direct Link  http://www.cirrus.com
Logo CIRRUS - Cirrus Logic

WM8912 Datasheet(HTML) 54 Page - Cirrus Logic

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WM8912
Production Data
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PD, Rev 4.1, February 2013
54
In master mode, LRCLK is derived from BCLK via a programmable division set by LRCLK_RATE.
The BCLK input to this divider may be internal or external, allowing mixed master and slave modes.
The direction of these signals and the clock frequencies are controlled as described in the “Digital
Audio Interface Control” section.
BCLK and LRCLK can be enabled as outputs in Slave mode, allowing mixed Master/Slave operation -
see “Digital Audio Interface Control”.
OPERATION WITH TDM
Time division multiplexing (TDM) allows multiple devices to transfer data simultaneously on the same
bus. The WM8912 supports TDM in master and slave modes for all data formats and word lengths.
TDM is enabled and configured using register bits defined in the “Digital Audio Interface Control”
section.
Figure 27 TDM with WM8912 as Master
Figure 28 TDM with other DAC as Master
Figure 29 TDM with Processor as Master



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