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参数资料
| 型号： | MAS3509F |
| 厂商： | MICRONAS SEMICONDUCTOR HOLDING AG |
| 元件分类： | Codec |
| 英文描述： | MAS 35x9F MPEG Layer 2/3, AAC Audio Decoder, G.729 Annex A Codec |
| 中文描述： | 新加坡金融管理局35x9F的MPEG 2 / 3层，AAC音频解码器，G.729的附件A编解码器 |
| 文件页数： | 30/92页 |
| 文件大小： | 1186K |
| 代理商： | MAS3509F |
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MAS 35x9F
DATA SHEET
30
June 30, 2004; 6251-505-1DS
Micronas
3.3.2.9. Default Read
The
Default Read
command is the fastest way to get
information from the MAS 35x9F. Executing the
Default Read
in a polling loop can be used to detect a
special state during decoding.
The
Default Read
command immediately returns the
lower 16 bit content of a specific RAM location as
defined by the pointer D0:ffb. The pointer must be
loaded before the first
Default Read
action occurs. If
the MSB of the pointer is set, it points to a memory
location in D1 rather than to one in D0.
Example: For watching D1:123 the pointer D0:ffb must
be loaded with 8123
hex
:
<DW 68 e0 00
00 01
0f fb
00 08
01 23>
write to D0 memory
1 word to write
start address ffb
value = 8...
...0123
hex
Now the
Default Read
commands can be issued as
often as desired:
<DW 69 <DR
dd dd
>
Default Read
command
16 bit content of the
address as defined by the
pointer
<DW 69 <DR
dd dd
>
... and do it again
3.3.2.10.Fast Program Download (Code 6
hex
)
The
Fast Program Download
command introduces a
data transfer via the parallel port.
n
= n2,n1,n0
denotes the number of 20-bit data words to be trans-
ferred,
a
= a3,a2,a1,a0 gives the start address. The
data must be organized in two times five nibbles to get
two words of 20-bit length. If the number n of 20-bit
data words is odd, the very last word has to be padded
with one additional nibble.
The download must be initiated in the following order:
– Issue
Freeze
command
– Stop all DMA-transfers
– Issue
Fast Program Download
command
– Download code via PIO-interface
– Switch appropriate memory area to act as program
RAM (register ED
hex
)
– Issue a
Run
command to start program execution at
entry point of downloaded code
Example for
Fast Program Download
command:
Download 5 words starting at D0:800,
then download 4 words starting at D1:200:
<DW 68 00 00>
Freeze
<DW 68 b3 b0 03 18>
Stop all internal transfers
<DW 68 b4 30 03 00>
<DW 68 b4 b0 00 00>
<DW 68 b5 30 03 18>
<DW 68 b6 b0 00 00>
<DW 68 bb b0 03 18>
<DW 68 bc 30 03 00>
<DW 68 b0 60 00 00>
<DW 68 60 05
08 00>
initiate download of 5 words
start at address D0:800
Now transfer 5 20-bit words via the parallel PIO-port:
d4,d3 d2,d1 d0,d4 d3,d2 d1,d0
d4,d3 d2,d1 d0,d4 d3,d2 d1,d0
d4,d3 d2,d1 d0,x
<DW 68 60 05
82 00>
initiate download of 4 words
start at address D1:200
Now transfer 4 20-bit words via the parallel PIO-port:
d4,d3 d2,d1 d0,d4 d3,d2 d1,d0
d4,d3 d2,d1 d0,d4 d3,d2 d1,d0
<DW 68 b6 bc 00 00>
switch the memory area
D0:800 ... D0:fff from
data to program usage
<DW 68 10 0a>
start program execution at
address D0:100a
3.3.2.11.Serial Program Download
Program downloads may also be performed via the
I
2
C-interface by using the
Write D0/D1 Memory
com-
mands. A similar command sequence as in the Fast
Program Download (
Freeze
, stop transfers...) applies.
S
DW
data_read
S
DR
W
A
A
W
A
P
N
A
d3,d2
W
d1,d0
S
DW
data_write
6
,n2
n1,n0
P
a3,a2
a1,a0
W
A
A
A
W
A
A
W
A
相关PDF资料 |
PDF描述 |
|---|---|
| MAS3519F | MAS 35x9F MPEG Layer 2/3, AAC Audio Decoder, G.729 Annex A Codec |
| MAS3529F | MAS 35x9F MPEG Layer 2/3, AAC Audio Decoder, G.729 Annex A Codec |
| MAS3539F | MAS 35x9F MPEG Layer 2/3, AAC Audio Decoder, G.729 Annex A Codec |
| MAS3549F | MAS 35x9F MPEG Layer 2/3, AAC Audio Decoder, G.729 Annex A Codec |
| MAS3587F | MPEG Layer 3 Audio Encoder/Decoder |
相关代理商/技术参数 |
参数描述 |
|---|---|
| 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 |
| MAS3539F | 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 |
| MAS3549F | 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 |
| MAS3559F | 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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