MAS3507D Micronas Intermetall, MAS3507D Datasheet - Page 37

• Manufacturer Part Number: MAS3507D
• Description: Mpeg 1/2 Layer 2/3 Audio Decoder
• Manufacturer: Micronas Intermetall

PRELIMINARY DATA SHEET
3.7.2.2. Output Configuration
The content of this memory cell depends on the start-
up configuration and will be set by the firmware. Never-
theless, the audio output interface is configurable by
the software to work in different 16 bit/sample modes
and 32 bit/sample modes (see Section 2.7.4. on
page 13). For adjusting to this, the following procedure
has to be done:
– Choose the output mode (see Table 3–18).
– Write this value to the memory (D0:$36f).
– Send a ‘run $475’ command. With the jump to this
3.7.3. Baseband Volume Matrix
The digital Baseband volume Matrix is used for con-
trolling the digital gain and a simple kind of stereo
basewidth enlargement as shown in Fig. 3–2. Table 3–
20 shows the proposed settings for the 4 volume
matrix coefficients for stereo, left and right mono. The
gain factors are given in fixed point notation. The gain
values may be written to the MAS 3507D by the con-
troller command ’write D1 memory’.
Table 3–19: Bit Assignment of the Volume Cells
Micronas
Address
D0:$36f
Address
D1:$7f8
D1:$7f9
D1:$7fa
D1:$7fb
Bits
19..0
address, the settings in the memory will become
valid for the internal processing. This overrides all
start-up settings
R/W
r/w
r/w
r/w
r/w
Name Value
LL/LR/RL/RR
Name
LL
LR
RL
RR
R/W
r/w
Function
Left->Left gain
Left->Right gain
Right->Left gain
Right->Right gain
Name
OutputConfig
Comment
524288/524288..524287/524288 = 1.0 .. 1.0
Default
$80000
$0
$0
$80000
Function
Configuration of the I
validate by ‘run $475’ command
Table 3–18: Output Configuration
Bits
19...15
14
13..12
11
10...6
5
4
3...0
2
S audio output interface
%0000.0
%0
%1
%00.
%0
%1
%000.00
%0
%1
%0
%1
%0000
Value
2^ 19
MAS 3507D
Comment
don’t care
SOC standard tim-
ing
SOC inverted tim-
ing
don’t care
no delay
additional delay of
data related to word
strobe
don’t care
not invert
invert outgoing
word strobe signal
32 bits/sample
16 bits/sample
don’t care
Default
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