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参数资料
| 型号： | MAS3504D |
| 厂商： | MICRONAS SEMICONDUCTOR HOLDING AG |
| 元件分类： | 消费家电 |
| 英文描述： | G.729 Annex A Voice Codec |
| 中文描述： | SPECIALTY CONSUMER CIRCUIT, PQCC44 |
| 封装： | PLASTIC, LCC-44 |
| 文件页数： | 18/40页 |
| 文件大小： | 680K |
| 代理商： | MAS3504D |
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MAS 3504D
18
Micronas
3.5.2.4. Pause and Mute
If the pause bit is set, the processing continues until
the current page is finished and then en-/decoding is
paused. The pause mode lasts until the pause bit is
cleared again or the mode is set to 0.
If the mute bit is set, the output is muted immediately.
Note that the other bits of the UserControl register
have to stay on their old values when switching to
pause mode.
3.5.3. Volume Control (Reg. FC
hex
)
Volume control is implemented in the MAS 3504D. It
allows to adjust the output volume linear from 0
hex
(silence) to 7FFFF
hex
(original volume).
3.5.4. Interface Control
All the interface control registers have to be written
before the encoder or decoder is started by writing to
the UserControl register. Otherwise they have no
effect until the operation mode is changed.
3.5.4.1. Wordlength Control (Reg. 74
hex
)
A value of 0
hex
sets wordlength on SDI and SDO inter-
faces to 32 bit. 1
hex
sets wordlength to 16 bit.
3.5.4.2. Input Configuration (Reg. 61
hex
)
The content of this register is set on startup by the
firmware. Additional to the Wordlength setting for the
serial interfaces, some other settings can be made.
3.5.4.3. Output Configuration (Reg. E1
hex
)
The content of this register is set on startup by the
firmware. Additional to the Wordlength setting for the
serial interfaces, some other settings can be made.
3.5.5. Hardware Control (Reg. FA
hex
)
The HWControl register is used to set special opera-
tion options.
If the page headers bit is 0, a header frame is trans-
ferred in front of each page of 50 data frames. If the
header bit is 1, all the frames are G.729 data frames.
Bits 2 and 1 are used to select input channels for
encoding. If both bits are set to 0, the left and right
channel are added to get the mono input signal. If only
one of this bits is 1, only the corresponding channel is
used as input.
Fig. 3
–
2:
Schematic timing of the data transmission with preceeding header
...
...
...
10ms 10ms ...
...
header
page
frame
1
frame
2
frame
3
frame
49
frame
49
header
page
frame
51
frame
52
frame
99
frame
100
header
page
frame
101
frame
102
$64 $6d $72 $31 $64 $61 $74 $61 $f4 $01
byte
2
byte
1
byte
4
byte
3
byte
6
byte
5
byte
8
byte
7
byte
10
byte
9
相关PDF资料 |
PDF描述 |
|---|---|
| MAS3506D | WorldSpace WorldSpace Audio Decoder |
| MAS3507D | MPEG 1/2 Layer 2/3 Audio Decoder |
| MAS3559F | MAS 35x9F MPEG Layer 2/3, AAC Audio Decoder, G.729 Annex A Codec |
| MAS35x9F | MAS 35x9F MPEG Layer 2/3, AAC Audio Decoder, G.729 Annex A Codec |
| MAS3509F | MAS 35x9F MPEG Layer 2/3, AAC Audio Decoder, G.729 Annex A Codec |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MAS3506D | 制造商:MICRONAS 制造商全称:MICRONAS 功能描述:WorldSpace WorldSpace Audio Decoder |
| MAS3507D | 制造商:MICRONAS 制造商全称:MICRONAS 功能描述:MPEG 1/2 Layer 2/3 Audio Decoder |
| MAS3509F | 制造商:MICRONAS 制造商全称:MICRONAS 功能描述:MAS 35x9F MPEG Layer 2/3, AAC Audio Decoder, G.729 Annex A Codec |
| MAS3519F | 制造商:MICRONAS 制造商全称:MICRONAS 功能描述:MAS 35x9F MPEG Layer 2/3, AAC Audio Decoder, G.729 Annex A Codec |
| MAS3529F | 制造商:MICRONAS 制造商全称:MICRONAS 功能描述:MAS 35x9F MPEG Layer 2/3, AAC Audio Decoder, G.729 Annex A Codec |
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