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參數資料
| 型號： | PT8401 |
| 廠商： | Princeton Technology Corporation |
| 元件分類： | 通用總線功能 |
| 英文描述： | MP3 Audio Decoder |
| 中文描述： | MP3音頻解碼器 |
| 文件頁數： | 5/28頁 |
| 文件大?。?/td> | 228K |
| 代理商： | PT8401 |
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Tel : 886-2-29162151
Fax: 886-2-29174598
URL:
http://www.princeton.com.tw
MP3 Audio Decoder
PT8401
PT8401 v 1.3
Page 5
Updated March 2002
Princeton Technology Corp.
Pin Name
BCK1
GPIO4
GPIO3
GPIO2
GPIO1
GPIO0
MCLKO
VSS
PWRDWN_
DSPRDY
PV
DD
PV
SS
FILT
I/O
I
I/O
I/O
I/O
I/O
I/O
O
Power
I
O
Power
Power
Passive
Description
Pin No.
32
33
34
35
36
37
38
39
40
41
42
43
44
First Serial Input Clock
General Purpose IO4 or Start-Up Configuration
General Purpose IO3 or Start-Up Configuration
General Purpose IO2 or Start-Up Configuration
General Purpose IO1 or Start-Up Configuration
General Purpose IO0 or Start-Up Configuration
Master Oversampling Clock Output for DAC
Digital Supply Ground
Power Down Control
Decoder Operation Ready
Digital Supply Positive for PLL
Digital Supply Ground for PLL
Connect to Capacitor 820pF.
Functional Description
System and Interface Description
PT8401 is capable of decoding MPEG audio bitstream through a serial data interface. With proper external
A/D converter, it is capable of encoding audio signal by the ADPCM Method. The primary operating mode
of PT8401 is divided into three sections: MP3 Decoder, ADPCM Encoder and ADPCM Decoder.
MP3 Decoding Mode:
The bitstream input may either be from the first serial bitstream interface or parallel
bitstream interface depending on the
SP_SEL
command. After processing, the audio data is outputted
through the serial output interface. The controller can get bitstream information through GPIO or I
2
C
interface even while the process is still in operation.
ADPCM Encoding Mode:
By connecting additional A/D to the second serial data interface and by
issuing several basic commands like
SetMode
and
AdpcmMode
via I
2
C or GPIO, PT8401 can start
ADPCM encoding, bitstream output through GPIO. Please refer to the Start-up Configuration and GPIO
Setting Section for detailed timing diagram.
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