STV8206 STMicroelectronics, STV8206 Datasheet - Page 18

• 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
Note:
3.2
18/97
The audio signals available on the I²S and SCART outputs are not affected by any digital or analog
matrix processing.
Smart Volume Control (SVC)
The Smart Volume Control (SVC) feature is designed to process sound level variations caused by
changes in signal sources (e.g. when switching channels) or in volume (e.g. when advertisements
are broadcast). The SVC is controlled by the SVC_ON bit in the
When the SVC_ON bit is set, the Smart Volume Control prevents annoying volume changes by
automatically adjusting the selected sound source (demodulator or SCART) to a programmable
reference level before audio processing. The regulation ranges from +6 dB to -30 dB with a fast
attenuation and a programmable slow amplification. The fast attenuation reduces audio peak (and
potential clipping) and slow amplification is a compromise between regulation recovery and limited
audio amplification during audio silence. The programmable output reference level must be defined
to prevent internal clipping depending on the selected audio processing boosting functions such as
Surround (up to +9 dB), Equalizer or Bass/Treble (up to +12 dB) and Loudness (up to +6 dB). When
the SVC is enabled, recommended reference values are -18 dB for the Loudspeaker path and -9 dB
for the Headphone path.
When the SVC is disabled, it acts as a wide-range prescaler (between -30 dB and +15.5 dB) before
audio-processing to prevent internal clipping depending on the selected functions (see above). If
SVC_SEL (59h)
SVC_CTRL (5Ah)
SVC_SEL (59h)
SVC_CTRL (5Ah)
Volume
CUT_ID (00h)
Control
Smart
Volume
Control
Smart
SRS
LS_STS_FREQ (5Dh)
(L+R)/2
LS_SRD_CTRL (5Bh)
LS_SRS_CENTER (5Fh)
LS_STS_GAIN (5Ch)
LS_SRS_SPACE (5Eh)
Spatial
Effects
ANA_LS_HP (07h)
LS_EQ_CTRL (60h)
LS_EQ_BAND1 (61h)
LS_EQ_BAND2 (62h)
LS_EQ_BAND3 (63h)
LS_EQ_BAND4 (64h)
LS_EQ_BAND5 (65h)
SW_ON
Figure 9: Audio Processor Block Diagram
BEEPER_TONE (7Ah)
BEEPER_CTRL (79h)
1
0
Loudspeaker Processing
LS_BAL(69h)
HP_BT_CTRL (71h)
HP_BASS_GAIN (72h)
HP_TREB_GAIN (73h)
(L+R)/2
Headphone Processing
SW_BAND (6Bh) SW_GAIN (6Ah)
Beeper
LS_LOUD(66h)_
Lowpass
Woofer
HP_BAL (77h)
Volume
LS_VOL_CTRL(67h)
LS_CVOL(68h)
HP_VOL_CTRL (75h)
HP_CVOL (76h)
SVC_CTRL
register.
ANA_LS_HP (07h)
ANA_LS_HP (07h)
Audio Mute
Low Noise
HPD
Noise
Audio
Mute
Low
STV82x6