28 And - Sony CXD2701Q Data Book

SONY
CXD1211P
Description
of
Functions
Digital
audio data input
Two
input formats,
MSB
first
mode
and
LSB
first
mode,
provided
for digital
audio data
and can be
selected
at
the
MSBF
input (pin
9),
(See
Fig, 2.)
1)
MSB
first
mode <MSBF =
"H")
BCK: 16 clocks/word
or
more
DATA, DATB:
MSB
first,
16
bits
from
the
last
2)
LSB
first
mode <MSBF =
"L")
BCK:
24
clocks/word
or
more
DATA, DATB: LSB
first,
16
bits
from
the
last
Validity flag
and
user data
As
the validity
Flag
and User Data
are
taken
in
at_the last
BCK
of
each
word
of
Digital
Audio
Data,
input the
value correponding
to
each
word
at
VRDTY
(pin 5)
or
UBIT
(pin
28} as
shown
in
Fig. 2.
The
recieved user data
can
be transmitted as
it
is
by connecting the
LIBIT
input
of this IC
to
the
UBIT
output of
a
receive/demodulation
IC,
CX23053
or
CXD1076P.
Channel
status data
In
Channel
Status Data,
bit 0,
6 and
7 are fixed
to
0,
corresponding
to
Mode
of
consumer
use.
In bit to
1
91
,
this IC
permits the following
1
bits to
be
set; Bit
1
,
2, 3, 8, 9,
1
0,
24, 2
5,
28 and
29. Set these
bits
in
parallel at
the respective
inputs.
With
these
bits,
the following items can be determined.
a.
Digital
data/Audio data
b.
Emphasis On/Off
c.
Digital
copy
enable/disable
d.
Category codes
(up to
8
kinds)
e.
Sampling frequency 44.1 kHz/48 kHz/32 kHz
f.
Clock accuracy
level
I/II/I1I
Dual Input selection
This
IC
is
equipped
with
pairs
of inputs
for Digital
Audio Data
(DATA/DATBI
and Channel
Status
Data
bit
2 (C2A/C2B). These
inputs
can
be
switched
at
the
ABSL
input
(pin
1
6).
As
the input
at
A8SL
is
sampled
with
LRCK
in
the
IC,
Digital
Audio Data
is
not
switched within the
same
single
sample,
This function
is
especially effective
when
inputting
TV
main
audio
and
additional
sub
audio
to
the
two
different
inputs
of satellite
broadcast
tuners.
Muting
function
By
setting
the input
at
MUTE
(pin
1
31
to"
H"
the audio data on
the
TX
output
(pin
15)
can be
set
to
while
keeping the Channel Status Data
and
User Data
unchanged.
As
the input
at
MUTE
is
also
sampled
with
LRCK
inside the
IC,
the data
is
muted
with
1
LRCK
as a
unit.
I
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