参数资料
型号: MAS3587F
厂商: Electronic Theatre Controls, Inc.
元件分类: 通用总线功能
英文描述: MPEG Layer 3 Audio Encoder/Decoder
中文描述: MPEG层3音频编码器/解码器
文件页数: 30/83页
文件大小: 734K
代理商: MAS3587F
MAS 3587F
ADVANCE INFORMATION
30
Micronas
3.3.1.12. Clear SYNC Signal (Code 5
hex
)
After the successful decoding of an MPEG frame the signal at pin SYNC rises and thus generates an interrupt event
for the microcontroller. Issuing this command lets the signal at pin SYNC return to
0
.
3.3.1.13. Default Read
The
Default Read
command is the fastest way to get information from the MAS 3587F. 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, the pointer refers 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
Default Read
commands can be issued as often as desired:
<DW 69 <DR
dd dd
>
command
16 bit content of the
address as defined by the
pointer
... and do it again
<DW 69 <DR
dd dd
>
S
DW
A
W
$68
A
W
5
,0
A
0,0
A
W
P
S
DW
A
W
$69
A
W
S
DR
A
W
d3,d2
A
N
d1,d0
W
P
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