TDA7340G Datasheet, PDF (13/27 Pages) STMicroelectronics – AUDIO SIGNAL PROCESSOR

TDA7340G
SPEAKER ATTENUATORS
MSB
LSB _{SPEAKER ATTENUATORS LF, LR, RF, RR}
D7 D6 D5 D4 D3 D2 D1 D0
-1.25dB STEPS
0
0
0 0dB
0
0
1 -1.25dB
0
1
0 -2.5dB
0
1
1 -3.75dB
1
0
0 -5dB
1
0
1 -6.25dB
1
1
0 -7.5dB
1
1
1 -8.75dB
10dB STEPS
0
0
0dB
0
1
-10dB
1
0
-20dB
1
1
-30dB
1
1
1
1
1 Speaker Mute
For example an attenuationof 25dB on a selected output is given by: 11110100
Note:
If the speaker attenuator bytes the three MSBs are used for additional Noise blanker Roll off programming
STEREO DECODER
MSB
LSB
D7 D6 D5 D4 D3 D2 D1 D0
FUNCTION
0
0 11dB Input Gain
0
1 8.5dB Input Gain
1
0 6dB Input Gain
1
1 3.5dB Input Gain
0
Stereo Decoder Muted
1
Stereo Decoder Off
1
Forced Mono
0
0
Noise Blanker Threshold 1 NBT 35mV
0
1
Noise Blanker Threshold 2 NBT 45mV
1
0
Noise Blanker Threshold 3 NBT 55mV
1
1
Noise Blanker Threshold 4 NBT 65mV
0
Pilot Threshold High (Pth = 0)
1
Pilot Threshold Low (Pth = 1)
For example pilot threshold low, noise blanker threshold 3 (NTB = 10), Stereo decoder ON, 6dB input
gain is given by: 11000010.
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