TDA7420 Datasheet, PDF (13/29 Pages) STMicroelectronics – MULTIFUNCTIONAUDIO PROCESSOR

TRANSMITTED DATA (SEND MODE)
MSB
X
X
X
X
X
AMS = True Blank Detected
SM = Soft mute activated
ST = Stereo (HIGH = active)
LSB
ST
SM
AMS
TDA7420
HIGH = Active
SUBADDRESS (RECEIVE MODE)
MSB
X
X
X
LSB
I
D3
D2
D1
D0
0
0
0
0 Mux
FUNCTION
0
0
0
1 Volume
0
0
1
0 Treble
0
0
1
1 Bass
0
1
0
0 Speaker Attenuator LF
0
1
0
1 Speaker Attenuator RF
0
1
1
0 Speaker Attenuator LR
0
1
1
1 Speaker Attenuator RR
1
0
0
0 Mute & Beep
1
0
0
1 Stereodecoder
1
0
1
0 Noise Blanker 1
1
0
1
1 Noise Blanker 2
1
1
0
0 AMS
1
1
0
1 Dolby Level Control
1
1
1
0 Metal Resistance Control
1
1
1
1 Preamplifier Attenuation
If bit in the subaddress byte is set to ” 1”, the autoincrement of subaddress is enabled
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