Datasheet

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TDA7448
In Incremental Bus Mode, the three “not used” functions must be addressed in any case. For example to refresh
“ Speaker Attenuation 3 = 0dB and Speaker Attenuation 6 = -40 dB”; the following bytes must be sent:
Table 7.
Table 8. SPEAKER ATTENUATION SELECTION
value = 0 to -79dB and MUTE
SUBADDRESS XXX10010
SPEAKER ATTENUATION OUT 1 XXXXXXXX
SPEAKER ATTENUATION OUT 2 XXXXXXXX
SPEAKER ATTENUATION OUT 3 00000000
SPEAKER ATTENUATION OUT 4 XXXXXXXX
SPEAKER ATTENUATION OUT 5 XXXXXXXX
SPEAKER ATTENUATION OUT 6 00101111
MSB LSB
SPEAKER ATTENUATION
D7 D6 D5 D4 D3 D2 D1 D0
000 0dB
001 -1dB
010 -2dB
011 -3dB
100 -4dB
101 -5dB
110 -6dB
111 -7dB
00000 -0dB
00001 -8dB
00010 -16dB
00011 -24dB
00100 -32dB
00101 -40dB
00110 -48dB
00111 -56dB
01 -64dB
10 -72dB
11 MUTE