TDA7448_04 Datasheet, PDF (7/14 Pages) STMicroelectronics – 6 CHANNEL VOLUME CONTROLLER

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.
SUBADDRESS
SPEAKER ATTENUATION OUT 1
SPEAKER ATTENUATION OUT 2
SPEAKER ATTENUATION OUT 3
SPEAKER ATTENUATION OUT 4
SPEAKER ATTENUATION OUT 5
SPEAKER ATTENUATION OUT 6
XXX10010
XXXXXXXX
XXXXXXXX
00000000
XXXXXXXX
XXXXXXXX
00101111
Table 8. SPEAKER ATTENUATION SELECTION
MSB
D7
D6
D5
D4
D3
D2
0
0
0
0
1
1
1
1
0
0
0
0
0
0
0
0
0
1
0
0
0
1
0
0
0
0
1
1
0
0
1
0
0
0
0
1
0
1
0
0
1
1
0
0
0
1
1
1
0
1
1
0
1
1
value = 0 to -79dB and MUTE
LSB
D1
D0
0
0
0
1
1
0
1
1
0
0
0
1
1
0
1
1
SPEAKER ATTENUATION
0dB
-1dB
-2dB
-3dB
-4dB
-5dB
-6dB
-7dB
-0dB
-8dB
-16dB
-24dB
-32dB
-40dB
-48dB
-56dB
-64dB
-72dB
MUTE
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