CS4205 Datasheet, PDF (57/80 Pages) Cirrus Logic – CrystalClear Audio Codec 97 with Portable Computing

CS4205
8. SONY/PHILIPS DIGITAL
INTERFACE (S/PDIF)
The S/PDIF digital output is used to interface the
CS4205 to consumer audio equipment external to
the PC. This output provides an interface for stor-
ing digital audio data or playing digital audio data
to digital speakers. Figure 22 illustrates the circuits
necessary for implementing the IEC-958 optical or
consumer interface. For further information on
S/PDIF operation see application note AN22: Over-
view of Digital Audio Interface Data Structures [3].
For further information on S/PDIF recommended
transformers see application note AN134: AES and
S/PDIF Recommended Transformers [4].
S/PDIF_OUT ^R1
SPDO/SDO2
R₂
DVdd 3.3V 5V
R₁ 247.5 Ω 375 Ω
R₂ 107.6 Ω 93.75 Ω
DGND
J1
T₁
+5V_PCI
0.1 µ F
SPDO/SDO2 ⁴
3
8.2 kΩ ₂
1
5
DGND
6
DGND
TOTX-173 _DGND
Figure 22. S/PDIF Output
DS489PP2
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