STV8206 STMicroelectronics, STV8206 Datasheet - Page 20

• Manufacturer Part Number: STV8206
• Description: IC TV AUDIO PROC/DEMOD 80-TQFP
• Manufacturer: STMicroelectronics
• Type: Audio Processorr

Specifications of STV8206

• Applications: Radio
• Mounting Type: Surface Mount
• Package / Case: 80-TQFP, 80-VQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Audio Processor Block
3.6
3.6.1
20/97
features dedicated to various kinds of music, to implement programmable Loudness or Super-bass
functions. The Headphone Bass/Treble feature is enabled by setting the BT_ON bit in the
HP_BT_CTRL
and HP_TREBLE_GAIN, respectively.
Volume/Balance Control
The STV82x6 provides a Volume/Balance Control for each of the Loudspeaker, Subwoofer and
Headphone audio outputs. Its wide range (from 0 to -96 dB in a linear scale) largely covers typical
home applications (approx. 60 dB) while maintaining a good S/N ratio. Its fine resolution (0.375 dB)
provides simple volume programming and a relative OSD scale representation. The Loudspeaker,
Subwoofer and Headphone volume values should be programmed progressively in steps of less
than 1 dB in order to prevent audible envelope variations and a minimum duration of 16 ms is
required between two successive programming commands to guarantee that there are no audible
plops during volume changes. In this case, a full 8-bit volume scan with minimum steps of 0.375 dB
will last approximately 4 s (minimum).
The Volume/Balance Control can operate in one of two different modes:
As the Loudspeaker bass frequencies are output by the Subwoofer, its reference volume is
controlled by default with the value of the
register value is used to adjust the level of the Subwoofer output in regards to this reference. In
Independent mode, the
into account the Loudspeaker audio level.
Differential Mode
The common value for the Right/Left volume controls for the Loudspeaker, Subwoofer and
Headphone outputs are programmed in registers LS_CVOL,
respectively. A differential balance can be applied using registers
the Left/Right level ratio as shown in
●
●
In Differential mode (default value), the volume control is a common volume value for both the
Left and Right Loudspeaker and Headphone channels.
In Independent mode, the volume for the Left and Right channels for Loudspeakers or
Headphone is controlled independently.
Mute
register. The Bass and Treble gain values are adjusted in registers
-96 dB
0 dB
00h
SW_GAIN
Figure 11: Volume Control
register is used as a separated volume control and does not take
I²C Control
Figure
LS_CVOL
12.
FFh
common volume register. The
SW_GAIN
LS_BAL
and HP_CVOL,
and
HP_BAL
HP_BASS_GAIN
SW_GAIN
to adjust
STV82x6