PT8401 Datasheet, PDF (21/28 Pages) Princeton Technology Corp – MP3 Audio Decoder

Princeton Technology Corp.
MP3 Audio Decoder
Tel : [phone]
Fax: [phone]
URL: http://www.princeton.com.tw
PT8401
00
Subband=4-31
Off
Off
01
Subband=8-31
On
Off
10
Subband=12-31
Off
On
11
Subband=16-31
On
On
3 copyright
0:not protected, 1: protected
2 original
0:copy, 1:original
0..1 emphasis
Indicate which type of emphesis is used
00
None
01
50/15 microseconds
10
reserved
11
CCITT J.17
0x03 NumAncillaryBits Current frame contain number of ancillary bits contain in current frame. Update in 0x0 R
every frame.
0x04. AncillaryData Current frame’s ancillary data. Update in every frame. Maximum is 56 bytes. 0x0 R
0x05 Error Status
Bit 0 : Set to 1 : indicates CRC check error.
0x0 R
Bit 1 : Set to 1 means bitstream error. The following several condition may cause
error :
1). Information in MPEG header point to “reserved” condition.(layer to “00”,
sampling frequency to “11”).
2). Bit rate index point to free and forbidden condition.
Electrical Characteristics
Absolute Maximum Ratings
Symbol
Parameter
V_SUP
Digital supply voltage
T_A
Ambient Operating Temperature
Pin Name
V_DD
Min. Max. Unit
2.7
4
V
-10
85 ? C
Recommended Operating Conditions
Symbol
Parameter
T_A
Ambient Operating
Pin
Name
Min. Typ. Max. Unit
25
?C
PT8401 v 1.3
Page 21
Updated March 2002