cs8413-cs Cirrus Logic, Inc., cs8413-cs Datasheet - Page 20

• Manufacturer Part Number: cs8413-cs
• Description: 96 Khz Digital Audio Receivers
• Manufacturer: Cirrus Logic, Inc.

contained at the end of the Status and IEnable Reg-
isters section.
CS8414 DESCRIPTION
The CS8414 does not need a microprocessor to
handle the non-audio data (although a micro may
be used with the C and U serial ports). Instead, ded-
icated pins are available for the most important
channel status bits. The CS8414 is a monolithic
CMOS circuit that receives and decodes digital au-
dio data which was encoded according to the digital
audio interface standards. It contains an RS422 line
receiver and clock and data recovery utilizing an
on-chip phase-locked loop. The audio data is out-
put through a configurable serial port that supports
14 formats. The channel status and user data have
their own serial pins and the validity flag is OR’ed
20
DGND
CS12/
FCK
RXN
RXP
SEL
VD+
13
16
9
10
7
8
Comparator
Frequency
VA+
22
3
Check
Parity
FILT
20
6
Clock & Data
C0/
E0
Recovery
AGND
5
6
Ca/
E1
21
Encoder
3
Error
4
Multiplexer
Bi-phase
Decoder
Cb/
E2
MCK
Frame
Sync
and
Figure 16. CS8414 Block Diagram
19
3
Cc/
F0
2
Cd/
F1
check
CRC
27
Ce/
F2
Channel
Status
Latch
De-Multiplexer
with the ERF flag to provide a single pin, VERF,
indicating that the audio output may not be valid.
This pin may be used by interpolation filters that
provide error correction. A block diagram of the
CS8414 is illustrated in Figure 16.
The line receiver and jitter performance are de-
scribed in the sections directly preceding the
CS8413 sections in the beginning of this data sheet.
Audio Serial Port
The audio serial port is used primarily to output au-
dio data and consists of three pins: SCK, FSYNC,
and SDATA. These pins are configured via four
control pins: M0, M1, M2, and M3. M3 selects be-
tween eight normal serial formats (M3 = 0), and six
special formats (M3 = 1).
6
Timing
M3
17
M2
Audio
Serial
CS8413 CS8414
18
Port
R
e
g
s
e
s
i
t
r
M1
24
M0
23
11
12
26
14
28
15
25
1
DS240F1
SDATA
VERF
FSYNC
SCK
C
U
CBL
ERF