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2004 Jan 26 51
Philips Semiconductors Product specification
MPEG-2 video and MPEG-audio/AC-3
audio encoder with multiplexer
SAA6752HS
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Table 22 I
2
C-bus audio encoder: bit rate control (static settings)
ADR
HEX
M
COMMAND
NAME
R/W SIZE/POSITION PARAMETER/RANGE DEFAULT DESCRIPTION
90 I disable audio
encoder
R/W 1 byte 0 Specifies if the audio encoder is enabled.
If the audio encoder is disabled, no audio data
will be inserted in the output stream.
bit 0 = 0 enabled
bit 0 = 1 disabled
91 I audio input format R/W 1 byte I
2
S defines the audio input format
bit[2:0] = 000 I
2
S
bit[2:0] = 001 reserved
bit[2:0] = 010 EIAJ 16 bits
bit[2:0] = 011 EIAJ 18 bits
bit[2:0] = 100 EIAJ 20 bits
bit[2:0] = 101 EIAJ alternative format
16 bits
bit[2:0] = 110 EIAJ alternative format
18 bits
bit[2:0] = 111 EIAJ alternative format
20 bits
92 I audio input mode
and port select
R/W 1 byte slave,
port 1
In master mode, SAA6752HS delivers the bit
clock and word select signal. In slave mode,
SAA6752HS receives the bit clock and word
select signal. Remark: If I
2
S port 2 is switched
to output mode (VES + AES output stream
mode) then SAA6752HS is fixed to master
mode.
bit 0 = 0 master mode
bit 0 = 1 slave mode
bit 1 = 0 port 1
bit 1 = 1 port 2
93 I audio processing
mode
R/W 1 byte MPEG-1
L2
defines the audio processing mode (see
Section 7.5); note 1
bit[1:0] = 00 MPEG-1 L2 encode
bit[1:0] = 01 DDC encode (only for
SAA6752HS/V103)
bit[1:0] = 10 LPCM bypass
bit[1:0] = 11 DVD bypass