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:
SUBADDRESS
XXX10010
XXXXXXXX
XXXXXXXX
00000000
SPEAKER ATTENUATION OUT 1
SPEAKER ATTENUATION OUT 2
SPEAKER ATTENUATION OUT 3
SPEAKER ATTENUATION OUT 4
SPEAKER ATTENUATION OUT 5
SPEAKER ATTENUATION OUT 6
XXXXXXXX
XXXXXXXX
00101111
SPEAKER ATTENUATION SELECTION
MSB
LSB
D0
0
SPEAKER ATTENUATION
D7
D6
D5
D4
D3
D2
0
D1
0
0dB
-1dB
-2dB
-3dB
-4dB
-5dB
-6dB
-7dB
0
0
1
0
1
0
0
1
1
1
0
0
1
0
1
1
1
0
1
1
1
0
0
0
0
0
0
0
0
0
1
1
0
0
0
0
0
0
0
0
1
0
1
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
-0dB
-8dB
-16dB
-24dB
-32dB
-40dB
-48dB
-56dB
-64dB
-72dB
MUTE
value = 0 to -79dB and MUTE
7/13
STMICROELECTRONICS [ ST ]
