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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： | 77/92页 |
| 文件大小： | 1186K |
| 代理商： | MAS3509F |
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DATA SHEET
MAS 35x9F
Micronas
June 30, 2004; 6251-505-1DS
77
4.6.2.5. S/PDIF Output Characteristics
at T = T
A
, V
SUPD
, V
SUPA
= 2.2 ... 3.6 V, f
CRYSTAL
= 18.432 MHz, Typ. values for T
A
= 25
°
C in P(L/M)QFP package.
Fig. 4–27:
Timing of the S/PDIF output
4.6.2.6. PIO as Parallel Input Interface: DMA Mode
In decoding mode, the data transfer can be started
after the EOD pin of the MAS 35x9F is set to “high”.
After verifying this, the controller signalizes the send-
ing of data by activating the PR line. The MAS 35x9F
responds by setting the RTR line to the “low” level. The
MAS 35x9F reads the data PI[19:12] and sets RTR to
low after rising edge of PR. After RTR is set to high,
the mC sets PR to low. The next data word write oper-
ation will be initialized again by setting the PR line via
the controller. Please refer to Figure for the exact tim-
ing.
The procedure above will be repeated until the
MAS 35x9F sets the EOD signal to “0” which indicates
that the transfer of one data block has been executed.
Subsequently, the controller should set PR to “0”, wait
until EOD rises again and then repeat the procedure to
send the next block of data. The DMA buffer for MPEG
decoding is 30 bytes long. The size for G.729 is 10
bytes.
Symbol
Parameter
Pin Name
Limit Values
Unit
Test Conditions
Min.
Typ.
Max.
f
s1
Bi-phase frequency
SPDO
3.072
MHz
f
s
= 48 kHz
f
s2
Bi-phase frequency
SPDO
2.822
MHz
f
s
= 44.1 kHz
f
s3
Bi-phase frequency
SPDO
2.048
MHz
f
s
= 32 kHz
t
P
Bi-phase period
SPDO
326
ns
at f
s
= 48 kHz, (highest
sampling rate)
t
R
Rise time
SPDO
0
2
ns
C
load
= 10 pF
t
F
Fall time
SPDO
0
2
ns
C
load
= 10 pF
Duty cycle
SPDO
50
%
t
H1,L1
SPDO
163
ns
minimum/maximum pulse
duration with a level
above 90% or below 10%
and at f
s
= 48 kHz
t
H0,L0
SPDO
326
ns
minimum/maximum pulse
duration with a level
above 90% or below 10%
and at f
s
= 48 kHz
V
S
Signal amplitude
SPDO
V
SUPD
t
P
t
R
t
F
Bit value = 1
Bit value = 0
t
H1
t
L1
t
H0
t
L0
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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