sta003t STMicroelectronics, sta003t Datasheet - Page 15

• Manufacturer Part Number: sta003t
• Description: Mpeg 2.5 Layer Iii Audio Decoder
• Manufacturer: STMicroelectronics

ANCCOUNT_L
Address: 0x41
Type: RO
Software Reset: 0x00
Hardware Reset: 0x00
ANCCOUNT_H
Address: 0x42
Type: RO
Software Reset: 0x00
Hardware Reset: 0x00
ANCCOUNT_H
ANCCOUNT registers are logically concatenated
and indicate the number of Ancillary Data bits
available at every correctly decoded MPEG
frame.
HEAD_H[23:16]
x = don’t care
AC15 AC14 AC13 AC12 AC11 AC10 AC9
MSB
MSB
MSB
AC7
b7
b7
b7
X
AC6
b6
b6
b6
X
AC5
b5
b5
b5
X
AC4
H20
b4
b4
b4
AC3
H19
b3
b3
b3
AC2
H18
b2
b2
b2
AC1
H17
b1
b1
b1
AC0
AC8
LSB
LSB
LSB
H16
b0
b0
b0
HEAD_M[15:8]
HEAD_L[7:0]
Address: 0x43, 0x44, 0x45
Type: RO
Software Reset: 0x00
Hardware Reset: 0x00
Head[1:0] emphasis
Head[2] original/copy
Head[3] copyrightHead
[5:4] mode extension
Head[7:6] mode
Head[8] private bit
Head[9] padding bit
Head[11:10] sampling frequency index
Head[15:12] bitrate index
Head[16] protection bit
Head[18:17] layer
Head[19] ID
Head[20] ID_ex
The HEAD registers can be viewed as logically
concatenated to store the MPEG Layer III Header
content. The set of three registers is updated
every time the synchronisation to the new MPEG
frame is achieved .
MSB
MSB
H15
H7
b7
b7
H14
H6
b6
b6
H13
H5
b5
b5
H12
H4
b4
b4
H1‘1
H3
b3
b3
H10
H2
b2
b2
STA003T
H9
H1
b1
b1
LSB
LSB
15/32
H8
H0
b0
b0