GS1503B Gennum Corporation, GS1503B Datasheet - Page 7

• Manufacturer Part Number: GS1503B
• Description: Hd Embedded Audio Codec
• Manufacturer: Gennum Corporation

1.1 Pin Descriptions
Table 1-1: Pin Descriptions
Number
1, 14, 27,
31, 37, 52,
60, 68, 73,
84, 97, 104,
109, 117,
125, 133
2
3
4
5
6
7
8
9
10
11
12
13
15
Symbol
VDD
AIN7/8
AIN5/6
AIN3/4
AIN1/2
WCINB
WCINA
DSCBYPASS
PLLCNTB
PLLCNTA
CASCADE
MUTE
ANCI
MUX/DEMUX
Type
–
I
I
I
I
I
I
I
O
O
I
I
I
I
Proprietary and Confidential
Description
+3.3V power supply pins.
Audio signal input for channels 7 and 8. AES/EBU digital audio data is bi-phase mark
encoded. For all non-AES/EBU input modes, bi-phase mark encoding is not required.
Audio signal input for channels 5 and 6. AES/EBU digital audio data is bi-phase mark
encoded. For all non-AES/EBU input modes, bi-phase mark encoding is not required.
Audio signal input for channels 3 and 4. AES/EBU digital audio data is bi-phase mark
encoded. For all non-AES/EBU input modes, bi-phase mark encoding is not required.
Audio signal input for channels 1 and 2. AES/EBU digital audio data is bi-phase mark
encoded. For all non-AES/EBU input modes, bi-phase mark encoding is not required.
48kHz word clock for channels 5 to 8. Used only when operating in Multiplex Mode and
when the audio source is not an AES/EBU data stream. This pin should be grounded when
inputting AES/EBU digital audio data or when operating in Demultiplex Mode (DEC_MODE
set LOW).
48kHz word clock for channels 1 to 4. Used only when operating in Multiplex Mode and
when the audio source is not an AES/EBU data stream. This pin should be grounded when
inputting AES/EBU digital audio data or when operating in Demultiplex Mode (DEC_MODE
set LOW).
Descrambler bypass. When set LOW, the internal SMPTE 292M descrambler is enabled.
When set HIGH, the internal SMPTE 292M descrambler is bypassed. The video input to the
device must be word aligned.
Audio clock PLL control signal for channels 5 to 8.
Audio clock PLL control signal for channels 1 to 4.
Cascade mode select. When set HIGH, the GS1503B will default to audio groups 3 and 4.
Two GS1503B devices can then be cascaded in series to allow up to 16 channels of audio
to be multiplexed or demultiplexed (only one device requires CASCADE to be set HIGH).
When set LOW, the GS1503B will default to audio groups 1 and 2.
Audio mute. In Multiplex Mode, when set HIGH, the embedded audio packets are forced to
'0'. In Demultiplex Mode, when set HIGH, the audio output data is forced to "0".
Ancillary data delete select. Valid in Demultiplex Mode only. When set HIGH, all ancillary
data packets are removed from both the Luma and Chroma channels of the input video
signal. The data contained in the packets are output at the corresponding pins. When set
LOW, all ancillary data packets remain in the video signal. See
Word Clock Input on page
Mode of operation. When set LOW, the GS1503B operates in Multiplex Mode.
When set HIGH, the GS1503B operates in Demultiplex Mode.
37953 - 0
73.
August 2006
GS1503B Data Sheet
Demultiplex Mode With
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