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LM4549AVH Datasheet(PDF) 21 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part # LM4549AVH
Description  AC ??7 Rev 2.1 Codec with Sample Rate Conversion and National 3D Sound
PDF  28 Pages
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Manufacturer  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM4549AVH Datasheet(HTML) 21 Page - National Semiconductor (TI)

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AC Link Serial Interface Protocol
(Continued)
SDATA_IN: Slot 4 – PCM Record Right Channel
This slot contains sampled data from the right channel of the
stereo ADC. The signal to be digitized is selected using the
Record Select register (1Ah) and subsequently routed
through the Record Select Mux and the Record Gain ampli-
fier to the ADC.
This is a 20-bit slot and the digitized 18-bit PCM data is
transmitted in an MSB justified format. The remaining 2
LSBs are stuffed with zeros.
SLOT 4, INPUT FRAME
Bits
Description
Comment
19:2
PCM Record
Right Channel
data
18-bit PCM sample from right
ADC
1:0
Reserved
Stuffed with "0"s by LM4549A
SDATA_IN: Slots 5 to 12 – Reserved
Slots 5 – 12 of the AC Link Input Frame are not used for data
by the LM4549A and are always stuffed with zeros.
www.national.com
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