STA308 STMicroelectronics, STA308 Datasheet - Page 12

• Manufacturer Part Number: STA308
• Description: IC AUDIO PROCESSOR DGTL 64-TQFP
• Manufacturer: STMicroelectronics
• Series: DDX™r
• Type: Audio Processorr

Specifications of STA308

• Mounting Type: Surface Mount
• Package / Case: 64-TQFP, 64-VQFP
• Case: QFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Applications: -

STA308
3.0.3 Bass Management Enable
Channel 6 of the STA308 features a bass management mode that enables redirection of information in all other
channels to this channel and which can then be filtered appropriately using the EQ(Biquad) section. Setting the
BME bit selects the output of the scale and mix block for channel 6 instead of the output of the channel mapping
block. The settings for the scale and mix block are provided by the CxBMS registers
3.0.4 DDX Headphone Output Enable
Channels 7 and 8 of the STA308 have the option to be processed for headphones. The headphone output can
then be driven using an appropriate output device. This signal is a fully differential 3-wire drive called DDX
Headphone
3.0.5 Max Power Correction
Setting the MPC bit turns on special processing that corrects the DDX power device at high power. This mode
should lower the THD+N of a full DDX system at maximum power output and slightly below. This mode will only
be operational in OM= 00 or 10.
3.1 Configuration Register B (address 01h)
3.1.1 DSP Bypass
Setting the DSPB bit bypasses the biquad and bass/treble functionality of the STA308.
3.1.2 Zero-Detect Mute Enable
Setting the ZDE bit enables the zero-detect automatic mute.
The zero-detect circuit looks at the input data to each processing channel after the channel mapping block. If
any channel receives 2048 consecutive zero value samples (regardless of fs) then that individual channel is
muted if this function is enabled.
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BIT
BIT
BIT
BIT
BIT
0
5
7
6
1
NAME
RST
BIT
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
RST
RST
RST
0
0
1
DRC
D7
0
RST
RST
0
1
NAME
HPE
NAME
NAME
BME
MPC
ZCE
D6
1
DDX Headphone Enable :
0 – Channels 7,8 normal DDX operation.
1 – Channels 7,8 DDX Headphone operation.
Bass Management Enable : 0 – No Bass Management
1 – Bass Management operation on channel 6, scale and add inputs
Max Power Correction : Setting of 1 enables DDX correction for THD reduction
near maximum power output.
NAME
DSPB
NAME
ZDE
SAIFB
D5
0
DSP Bypass Bit : 0 – Normal Operation
1 – Bypass of Biquad and Bass/Treble Functionality
SAI2
Zero-Detect Mute Enable : Setting of 1 enables the
automatic zero-detect mute
D4
0
SAI1
D3
DESCRIPTION
0
DESCRIPTION
DESCRIPTION
DESCRIPTION
SAI0
DESCRIPTION
D2
0
ZDE
D1
1
DSPB
D0
0