Cirrus Logic CS8406 - Manual (Page 10)

10 DS580F6
CS8406
CS8406
+3.3 V or +5.0 V
GND
ILRCK
ISCLK
SDIN
Hardware
Control
APMS
TCBLD
RST
SFMT0
VD VL
TXP
0.1 F 
Serial
Audio
Source
Clock Source
and Control
OMCK
SFMT1
TXN
H/S
TCBL
To/from other
CS8406's
CEN
47k
U
Transmission
Interface
User Data
Source
EMPH
AUDIO
ORIG
V
Validity
Source
+3.3 V or +5.0 V
0.1 F 
47k
C Data
Source
COPY/C HWCK1
HWCK0
Figure 6. Recommended Connection Diagram for Hardware Mode