STA308A STMicroelectronics, STA308A Datasheet - Page 27

• Manufacturer Part Number: STA308A
• Description: IC AUDIO PROCESSOR DGTL 64-TQFP
• Manufacturer: STMicroelectronics
• Series: DDX™r
• Type: Audio Processorr

Specifications of STA308A

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

STA308A
7.2.5
7.2.6
Configuration register E (0x04)
Each individual channel output can be set to output a binary PWM stream. In this mode
output A of a channel will be considered the positive output and output B is negative inverse.
Configuration register F (0x05)
The STA308A features an internal digital high-pass filter for the purpose of AC coupling. The
purpose of this filter is to prevent DC signals from passing through a DDX amplifier. DC
signals can cause speaker damage.
If HPB = 1, then the filter that the high-pass filter utilizes is made available as user-
programmable biquad#1.
Both limiters can be used in one of two ways, anti-clipping or dynamic range compression.
When used in anti-clipping mode the limiter threshold values are constant and dependent on
the limiter settings.
C8BO
0
PWMS2
0
0
1
2
3
4
5
6
7
0
1
Bit
Bit
Bit
D7
D7
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
C7BO
0
PWMS1
0
D6
D6
0
0
0
0
0
0
0
0
0
0
RST
RST
RST
C6BO
0
PWMS0
0
C1BO
C2BO
C3BO
C4BO
C5BO
C6BO
C7BO
C8BO
HPB
DRC
D5
D5
Name
Name
Name
C5BO
0
BQL
0
D4
D4
Channels 1, 2, 3, 4, 5, 6, 7, and 8 binary output
mode enable bits. A setting of 0 indicates ordinary
DDX tristate output. A setting of 1 indicates binary
output mode.
Dynamic range compression/anti-clipping
0: limiters act in anti-clipping mode
1: limiters act in dynamic range compression mode
High-pass filter bypass bit: setting of one bypasses
internal AC coupling digital high-pass filter
C4BO
0
PSL
0
D3
D3
C3BO
0
DEMP
0
Description
Description
Description
D2
D2
C2BO
0
DRC
0
D1
D1
C1BO
0
HPB
0
Registers
D0
D0
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