STA015B$ STMicroelectronics, STA015B$ Datasheet - Page 26

• Manufacturer Part Number: STA015B$
• Description: DECODER AUDIO MPEG 2.5 8X8LFBGA
• Manufacturer: STMicroelectronics
• Type: Audio Decoderr

Specifications of STA015B$

• Applications: Sound Cards, Players, Recorders
• Voltage - Supply, Digital: 2.4 V ~ 3.6 V
• Mounting Type: Surface Mount
• Package / Case: 64-LFBGA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Supply, Analog: -

STA015
Mode extension
These bits are used in joint stereo mode. They indicates which type of joint stereo coding method is ap-
plied. The frequency ranges, over which the intensity_stereo and ms_stereo modes are applied, are im-
plicit in the algorithm.
Copyright
If this bit is equal to ’0’, there is no copyright on the bitstream, ’1’ means copyright protected.
Original/Copy
This bit equals ’0’ if the bitstream is a copy, ’1’ if it is original.
Emphasis
Indicates the type of de-emphasis that shall be used.
DLA
Address: 0x46 (70)
Type: R/W
Software Reset: 0x00
Hardware Reset: 0x00
DLA register is used to attenuate the level of audio output at the Left Channel using the butterfly shown in
Fig. 18. When the register is set to 255 (0xFF), the maximum attenuation is achieved.
A decimal unit correspond to an attenuation step of 1 dB.
Figure 18. Volume Control and Output Setup
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DLA7
MSB
b7
0
0
0
0
:
emphasis
DLA6
’00’
’01’
’10’
’11’
b6
0
0
0
1
:
DLA5
b5
DSP Right Channel
0
0
0
1
:
DSP Left Channel
DLA4
b4
0
0
0
0
:
none
50/15 microseconds
reserved
CCITT J, 17
DLA3
X
X
X
X
DRB
DRA
DLA
DLB
b3
0
0
0
0
:
DLA2
b2
0
0
0
0
:
DLA1
b1
emphasis specified
0
0
1
0
:
+
+
Output Right Channel
Output Left Channel
DLA0
LSB
b0
0
1
0
0
:
D97AU667
OUTPUT ATTENUATION
NO ATTENUATION
Description
-96dB
-1dB
-2dB
: