TDA7400 Datasheet, PDF (23/28 Pages) STMicroelectronics – ADVANCED CAR SIGNAL PROCESSOR

TDA7400
Soft Mute and Bass Programming (subaddress 8H)
MSB
LSB
FUNCTION
D7 D6 D5 D4 D3 D2 D1 D0
Mute
0 Enable Soft Mute
1 Disable Soft Mute
0
0
Mutetime = 0.48ms
0
1
Mutetime = 0.96ms
1
0
Mutetime = 40.4ms
1
1
Mutetime = 324ms
0
Stereodecoder Soft Mute Influence = on
1
Stereodecoder Soft Mute Influence = off
0
0
0
1
1
0
1
1
1
1
Bass Center Frequency
Center Frequency = 60 Hz
Center Frequency = 70 Hz
Center Frequency = 80 Hz
Center Frequency = 100Hz
Center Frequency = 150Hz (1)
0
0
0
1
1
0
1
1
Noise Blanker Time
Center Frequency = 38µs
Center Frequency = 25.5µs
Center Frequency = 32µs
Center Frequency = 22µs
(1) Only for Bass Q-Factor = 2.0
Stereodecoder (subaddress 9H)
MSB
LSB
FUNCTION
D7 D6 D5 D4 D3 D2 D1 D0
0 STD Unmuted
1 STD Muted
0
1
1
0
In Gain 8.5dB
In Gain 6dB
others combinations not used
1
must be ”1”
0
Forced Mono
1
Mono/Stereo switch automatically
0
Noiseblanker PEAK charge current low
1
Noiseblanker PEAK charge current high
0
Pilot Threshold HIGH
1
Pilot Threshold LOW
0
Deemphasis 50µs
1
Deemphasis 75µs
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