PT8401 Datasheet, PDF (15/28 Pages) Princeton Technology Corp – MP3 Audio Decoder

Princeton Technology Corp.
MP3 Audio Decoder
Command Registers
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Fax: [phone]
URL: http://www.princeton.com.tw
PT8401
MAIN FUNCTION COMMAND
Address Register Name
Description
0x40
Play 0/1: stop/run the current operation mode. After reset, the controller set
necessary command, then set this bit to 1 to start decode.
2: Pause Mode.
3: Fast Forward Mode.
4: Second Fast Forward Mode
Note:2,3,4 only work on MPEG Decoding Mode.
0x41 SetMode 0 : MPEG Decoding Mode.
1 : Start ADPCM Mode.
2 : PCM bypass from First Serial Port.
3 : PCM bypass from Second Serial Port.
0x42 ADPCMMode 0 : ADPCM Decoding Mode
1 : ADPCM Encoding Mode.
0x43
Mute 1 : Mute all output signals.
0x44
Volume Output Volume Control. The range is between 0 dB and -96dB(0x60).
0x45 SP_SEL Serial/Parallel Input Selection.
0 : First Input Serial Port Input is selected.
1 : Input Parallel Port Input is selected.
Note : After this bit is set, it is better to run Software Reset to prevent
instability.
0x46 Set_SAO Serial Output Port Mode Setting.
Bit 0
0 : 32 bits per sample mode.
1 : 16 bits per sample mode.
Bit 1
0 : ALRQ Signal. Left is "Low".
1 : ALRQ Signal. Left is "High".
Bit 2
0 : Relative Timing No Delay to ALRQ.
1 : Relative Timing One Delay to ALRQ.
Bit 3
0 : Data is Left Alignment.
1 : Data is Right Alignment
Default R/W
0x0 R/W
0x0 R/W
0x0 R/W
0x0 R/W
0x0 R/W
0x0 R/W
0x0 R/W
PT8401 v 1.3
Page 15
Updated March 2002