Sony CXD2701Q Data Book page 163

SONY,
CXD1355AQ
Audio
Digital
Signal
Processing
LSI with
Built-in Digital Filter
Description
The
CXD13S5AQ
is
an
ADSP
(Audio
Digital
Signal
Processor) LSI
incorporating
an audio
digital
signal
processor
with
programmable
DSP
features
and an
8-times oversarnpling
filter.
Features
Software
programmable
digital
signal
processing
features (1/2)Xfs
down
-sampling with
post processing
using 64-times
multiply/add operations possible.
Through
the
use
of
external
delay
DRAM
(64kx4-bit/
256kx4-bit
selectable),
sound
Held
processing
attributes
such as
delay,
echo and
reverberation
can be
controlled.
By
cascading
the internal filters-107th, 19th,
and
3rd
FIR
filters-8-times
or 4-times oversarnpling
filters is
possible.
In
addition
this
LSI incorporates attenuator functions
and a
host of
other features
into
a
single chip solution
for
enhancing
the
performance
of
audio systems.
Functions
•
Programmable sound
field
processing, pre-processing
down-sampling
(fs-*fs/2),
and
post-
processing
up-sampling (fs/2^»1s).
• External delay
RAM,
64kx4bit
or
256kx4bit,
•
Internal
coefficient
RAM
(or
DSP
functions
and
command RAM.
• Delays up
to
a
maximum
of
64k samples
tor
both L
and
R
channels,
•
Built-in
2-channel oversarnpling
digital
filters
for
handling 8-times/4-times oversarnpling.
•
Filter
characteristics
Ripple
:
±
0.001
dB
or less (0 to
20kHz)
Attenuation
:
-70 dB
or less
(24.1
to
150kHz)
•
Digital
de-emphasis
function
•
Digital
attenuation function
•
Built-in
1st-order noise
shaper
•
Digital offset (+1
%)
function
• Input
data inversion
• I/O format
Input
:
2
's
complement
MSB
first
serial
(1
6-bit
slot)
Output
:
2's
complement
MSB
first
serial
(16-bit
or 18-
bit
slot
selectable)
Structure
Silicon
gate
CMOS
Absolute
Maximum
Ratings
(Ta=25°C
,
Vss=0V)
• Supply
voltage
Vdd Vss-0,5
to
6.5
V
• Input voltage
Vi
Vss-0.5
to
Vdd+0.5
V
•
Operating temperature
Topr -20
to
75
°C
• Storage temperature
Tstg
-55
to
150
Recommended
Operating Conditions
•
Supply
voltage
Voo
4.5
to
5,5 (Typ,
5,0)
V
• Operating temperature
Topr
-20
to
75
°C
•
OSC
frequency
fxT
10
to
20
MHz
I
ES2'37-ST
159