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PDF SAA7282GP Data sheet ( Hoja de datos )
| Número de pieza | SAA7282GP | |
| Descripción | Terrestrial Digital Sound Decoder TDSD2 | |
| Fabricantes | NXP Semiconductors | |
| Logotipo |  |
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INTEGRATED CIRCUITS
DATA SHEET
SAA7282
Terrestrial Digital Sound Decoder
(TDSD2)
Product specification
File under Integrated Circuits, IC02
July 1993
1 page  
Philips Semiconductors
Terrestrial Digital Sound Decoder (TDSD2)
Product specification
SAA7282
SYMBOL SOT205AG
n.c. 39 to 41
i.c. 42
n.c. 43
VDD
44
SOT232A
−
26
−
27
DESCRIPTION
not connected
internally connected; must be left open-circuit in application
not connected
digital supply voltage
handbook, halfpage
PCLK 1
32 DATA
RESET 2
31 XOUT
SCL 3
SDA 4
30 XIN
29 VSS
PORT2 5
28 DOBM
ADSEL 6
27 VDD
MUTE 7
26 i.c.
VDDAR 8
25 VDDAL
SAA7282ZP
VSSAR 9
24 VSSAL
VRO 10
23 OPL
VRC 11
22 EXTL
OPR 12
21 FML
EXTR 13
20 INTL
FMR 14
INTR 15
CDR 16
19 CDL
18 VDAC
17 VREF
MLB153
Fig.2 Pin configuration (SOT232A).
July 1993
5
5 Page 
Philips Semiconductors
Terrestrial Digital Sound Decoder (TDSD2)
Product specification
SAA7282
DIGITAL AUDIO INTERFACE IEC/EBU 958
Block structure
The output is grouped into a block of 192 consecutive
frames providing, for each channel the 192 channel status
data bits. The start of a block is designated by a special
sub-frame preamble.
Frame structure
Each frame is uniquely composed of two sub-frames. The
rate of transmission of frames corresponds exactly to the
source sampling frequency. In the 2-channel operation,
samples taken from both channels are transmitted by time
multiplexing in consecutive sub-frames. Sub-frames
related to Channel 1 (left or 'A' channel in stereophonic
operation and primary channel in monophonic operation)
normally use preamble M. However the preamble is
changed to preamble B once every 192 frames. This
defines the block structure used to organize the channel
status information. Sub-frames of Channel 2 (right or 'B'
channel in stereophonic operation and secondary channel
in monophonic operation) always use preamble W.
Sub-frame structure
Each frame is divided into 32 time-slots numbered 0 to 31.
Time-slots 0 to 3 carry one of three permitted preambles.
These are used to affect synchronization of sub-frames,
frames and blocks.
Time-slots 4 to 27 carry the audio sample word in linear
two's complement representation. The most significant bit
is carried by time-slot 27.
Time-slot 28 carries the validity flag associated with the
audio sample word. This flag is set to logic 0 if the audio
sample is reliable. If set to logic 1 then the sample is
unreliable.
Time-slot 29 carries one bit of the user data channel. In
this application this is not used and so is set to logic 0.
Time-slot 30 carries one bit of the channel status world
associated with the audio channel transmitted in the same
sub-frame.
Time-slot 31 carries a parity bit such that time-slots 4 to 31
inclusive will carry an even number of ones and an even
number of zeros.
handbook, full pagewidth
M channel 1 W channel 2 B channel 1 W channel 2 M channel 1 W channel 2
frame 191
sub-frame
sub-frame
frame 0
start of block
frame 1
MLB155
Fig.4 Frame format.
handbook, full pagewidth
0 34
11 12
sync
preamble
logical 0 bits
L
S
B
MLB156
audio sample word
27 28
31
M
S
B V UC P
validity flag
user data = logic 0
channel status
parity bit
Fig.5 Sub-frame format.
July 1993
11
11 Page | ||
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| PDF Descargar | [ Datasheet SAA7282GP.PDF ] | |
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