MAS3507D Micronas Intermetall, MAS3507D Datasheet - Page 38

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

MAS 3507D
Fig. 3–2: Digital volume matrix
Table 3–21: Volume matrix conversion (dB into hexadecimal)
Table 3–21 contains the converted gain values as used in the ’write D1 memory’ command
38
right audio
left audio
Volume
(in dB)
10
11
12
13
14
15
16
17
18
19
0
1
2
3
4
5
6
7
8
9
Hexa
decimal
80000
8DEB8
9A537
A5621
AF3CD
B8053
BFD92
C6D31
CD0AD
D2958
D785E
DBECC
DFD91
E3583
E675F
E93CF
EBB6A
EDEB6
EFE2C
F1A36
1
1
1
1
Volume
(in dB)
RR
LR
RL
LL
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
Hexa
decimal
F3333
F4979
F5D52
F6F03
F7EC8
F8CD5
F995B
FA485
FAE78
FB756
FBF3D
FC648
FCC8E
FD227
FD723
FDB95
FDF8B
FE312
FE638
FE905
+
+
Volume
(in dB)
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
Hexa
decimal
FEB85
FEDBF
FEFBB
FF180
FF314
FF47C
FF5BC
FF6DA
FF7D9
FF8BC
FF986
FFA3A
FFADB
FFB6A
FFBEA
FFC5C
FFCC1
FFD1B
FFD6C
FFDB4
Table 3–20: Settings for the digital volume matrix
The fixed point gain values correspond to 20 bit 2’s
complement notation. The conversion between fixed
point and 2’s complement notation is done easily by
the algorithms described in Section 3.2.1.
Memory
location
Name
Stereo
(default)
Mono
left
Mono
right
Volume
(in dB)
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
D1:
$7f8
LL
0
1.0
1.0
Hexa
decimal
FFDF4
FFE2D
FFE60
FFE8D
FFEB5
FFED9
FFEF9
FFF16
FFF2F
FFF46
FFF5A
FFF6C
FFF7C
FFF8B
FFF97
FFFA3
FFFAD
FFFB6
FFFBE
FFFC5
PRELIMINARY DATA SHEET
D1:
$7f9
LR
0
0
1.0
Volume
(in dB)
D1:
$7fa
RL
0
0
1.0
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
Hexa
decimal
FFFCC
FFFD1
FFFD6
FFFDB
FFFDF
FFFE3
FFFE6
FFFE9
FFFEB
FFFED
FFFEF
FFFF1
FFFF3
FFFF4
FFFF6
FFFF7
FFFF8
FFFF9
FFFF9
FFFFA
Micronas
D1:
$7fb
RR
0
1.0
1.0