TDA8295_09 Datasheet, PDF (39/83 Pages) NXP Semiconductors – Digital global standard low IF demodulator for analog TV and FM radio

NXP Semiconductors
TDA8295
Digital global standard low IF demodulator for analog TV and FM radio
TDA8295_C2_2
Product data sheet
Table 38. SOUNDSET_2 register (address 21h) bit description …continued
Legend: * = default value.
Bit
Symbol
Access Value Description
3
FOR_MUTE R/W
When active, the mono sound signal is always muted.
This setting only makes sense in case the sound DAC
output is also set to mono sound
(SSIF_SND[1:0] = 01). FOR_MUTE has no function if
SSIF_SND[1:0] = 10.
0*
off
1
on
X
don’t care if SSIF output is chosen
(SSIF_SND[1:0] = 10)
2
AUTO_MUTE R/W
When active, the mono sound signal is muted if the
horizontal lock flag (N_H_LOCK) disappears. This
setting only makes sense in case the sound DAC
output is also set to mono sound
(SSIF_SND[1:0] = 01). FOR_MUTE has no function if
SSIF_SND[1:0] =10.
0*
off
1
on
X
don’t care if SSIF output is chosen
(SSIF_SND[1:0] = 10)
1 and 0 SSIF_SND[1:0] R/W
either mono sound or SSIF can be chosen for the
sound DAC output
01
mono sound
10*
SSIF
Table 39. SOUND_LEVEL register (address 22h) bit description
Legend: * = default value.
Bit Symbol
Access Value Description
7 to 5 -
R/W -
not used
4 to 0 SND_LVL[4:0] R/W
mono sound output level
0 0001
−12 dB nominal; implemented for flexibility reasons.
With this setting, the adaptation to different standard
requirements can be done.
0 0010
−6 dB nominal; implemented for flexibility reasons.
With this setting, the adaptation to different standard
requirements can be done. It is chosen for FM radio
because of the large FM deviation involved.
0 0100
Nominal setting; FM deviations up to 100 kHz can be
processed without sound DAC clipping. The clipping
level is 535 mV (RMS) typically.
0 1000* +6 dB nominal; chosen for M/N standard due to less
nominal frequency deviation
1 0000
+12 dB nominal; implemented for flexibility reasons.
With this setting, the adaptation to different standard
requirements can be done.
X XXXX don’t care if SSIF output is chosen
(SSIF_SND[1:0] = 10)
Rev. 02 — 27 November 2009
© NXP B.V. 2009. All rights reserved.
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