CS8403A-CS CIRRUS [Cirrus Logic], CS8403A-CS Datasheet - Page 25

• Manufacturer Part Number: CS8403A-CS
• Description: 96KHZ DIGITAL AUDIO TRANSMITTER
• Manufacturer: CIRRUS [Cirrus Logic]

Consumer - CD Submode
The consumer CD submode is invoked by placing
the part in consumer mode (PRO = high) and set-
ting both FC1 and FC0 high. This mode redefines
some of the pins for a CD subcode port as shown in
Figure 21. The CD subcode port pins, SBF and
SBC, replace the C and CBL pins respectively. The
user data input, U, becomes the CD subcode input.
Figure 22 describes the timing for the CD subcode
port. When SBF is low, SBC becomes active,
DS239PP1
FSYNC
SDATA
+5V
SCK
SBF
SBC
U
V
PRO
8
6
7
10
11
15
9
2
FC0
3
FC1
Figure 21. CS8404A Block Diagram - Consumer Mode, CD Submode
24
C2
4
Subcode
M2 M1 M0
Registers
C3
23 22 21
Port
Serial
Logic
Port
1
C8
13
C9
14
C15
12
Preamble
Validity
C Bits
U Bits
Audio
Parity
Aux
clocking in the subcode bits. SBF goes high for one
SCK period, one half SCK period after the active
edge of FSYNC for all formats (except format 4,
which will be one and a half SCK periods after the
active edge of FSYNC). SBF high for more than 16
SBC periods indicates the start of a subcode block.
The first, third, and fourth Q bits after the start of a
subcode block become channel status bits 5, 2, and
3 respectively. Channel status bits are set by the
dedicated pins; the category code is forced to CD.
Mux
Biphase
Encoder
Timing
Mark
MCK
CS8403A CS8404A
5
Driver
Line
20
17
16
TXP
TXN
RST
25