7314 查看數據表（PDF） - STMicroelectronics
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7314 Datasheet PDF : 12 Pages
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TDA7314
SOFTWARE SPECIFICATION (continued)
DATA BYTES (detailed description)
Volume
MSB
0
0
LSB
FUNCTION
B2
B1
B0
A2
A1
A0
Volume 1.25dB steps
0
0
0
0
0
1
0
1
0
0
1
1
1
0
0
1
0
1
1
1
0
1
1
1
0
-1.25
-2.5
-3.75
-5
-6.25
-7.5
-8.75
0
0
B2
B1
B0
A2
A1
A0
Volume 10dB steps
0
0
0
0
0
0
1
-10
0
1
0
-20
0
1
1
-30
1
0
0
-40
1
0
1
-50
1
1
0
-60
1
1
1
-70
For example a volume of -45dB is given by:
00100100
Speaker Attenuators
MSB
1
0
0
B1
B0
A2
A1
1
0
1
B1
B0
A2
A1
1
1
0
B1
B0
A2
A1
1
1
1
B1
B0
A2
A1
0
0
0
0
0
1
0
1
1
0
1
0
1
1
1
1
0
0
0
1
1
0
1
1
1
1
1
1
For example attenuation of 25dB on speaker RF is given by:
10110100
LSB
FUNCTION
A0
Speaker LF
A0
Speaker RF
A0
Speaker LR
A0
Speaker RR
0
0
1
-1.25
0
-2.5
1
-3.75
0
-5
1
-6.25
0
-7.5
1
-8.75
0
-10
-20
-30
1
Mute
9/12
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