参数资料
型号: MAS3507D
厂商: MICRONAS SEMICONDUCTOR HOLDING AG
元件分类: 通用总线功能
英文描述: MPEG 1/2 Layer 2/3 Audio Decoder
中文描述: 的MPEG 1 / 2 2 / 3层音频解码器
文件页数: 38/60页
文件大小: 867K
代理商: MAS3507D
MAS 3507D
PRELIMINARY DATA SHEET
38
Micronas
Fig. 3–2:
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.
Table 3–21 contains the converted gain values as used in the ’write D1 memory’ command
1
1
1
1
LL
LR
RL
RR
+
+
left audio
right audio
Table 3–20:
Settings for the digital volume matrix
Memory
location
D1:
$7f8
D1:
$7f9
D1:
$7fa
D1:
$7fb
Name
LL
LR
RL
RR
Stereo
(default)
1.0
0
0
1.0
Mono
left
1.0
1.0
0
0
Mono
right
0
0
1.0
1.0
Table 3–21:
Volume matrix conversion (dB into hexadecimal)
Volume
(in dB)
Hexa
decimal
Volume
(in dB)
Hexa
decimal
Volume
(in dB)
Hexa
decimal
Volume
(in dB)
Hexa
decimal
Volume
(in dB)
Hexa
decimal
0
80000
20
F3333
40
FEB85
60
FFDF4
80
FFFCC
1
8DEB8
21
F4979
41
FEDBF
61
FFE2D
81
FFFD1
2
9A537
22
F5D52
42
FEFBB
62
FFE60
82
FFFD6
3
A5621
23
F6F03
43
FF180
63
FFE8D
83
FFFDB
4
AF3CD
24
F7EC8
44
FF314
64
FFEB5
84
FFFDF
5
B8053
25
F8CD5
45
FF47C
65
FFED9
85
FFFE3
6
BFD92
26
F995B
46
FF5BC
66
FFEF9
86
FFFE6
7
C6D31
27
FA485
47
FF6DA
67
FFF16
87
FFFE9
8
CD0AD
28
FAE78
48
FF7D9
68
FFF2F
88
FFFEB
9
D2958
29
FB756
49
FF8BC
69
FFF46
89
FFFED
10
D785E
30
FBF3D
50
FF986
70
FFF5A
90
FFFEF
11
DBECC
31
FC648
51
FFA3A
71
FFF6C
91
FFFF1
12
DFD91
32
FCC8E
52
FFADB
72
FFF7C
92
FFFF3
13
E3583
33
FD227
53
FFB6A
73
FFF8B
93
FFFF4
14
E675F
34
FD723
54
FFBEA
74
FFF97
94
FFFF6
15
E93CF
35
FDB95
55
FFC5C
75
FFFA3
95
FFFF7
16
EBB6A
36
FDF8B
56
FFCC1
76
FFFAD
96
FFFF8
17
EDEB6
37
FE312
57
FFD1B
77
FFFB6
97
FFFF9
18
EFE2C
38
FE638
58
FFD6C
78
FFFBE
98
FFFF9
19
F1A36
39
FE905
59
FFDB4
79
FFFC5
99
FFFFA
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