7404 查看數據表（PDF） - STMicroelectronics
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7404 Datasheet PDF : 26 Pages
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TDA7404D
2.5.3 Volume
MSB
LSB
D7
D6
D5
D4
D3
D2
D1
D0
ATTENUATION
Gain/Attenuation
0
0
0
0
0
0
0 not allow
0
0
0
0
0
0
1 not allow
0
0
0
0
0
1
0 +30.0dB
0
0
0
0
0
1
1 +29.0dB
:
0
0
1
1
1
1
1 +1.0dB
0
1
0
0
0
0
0
0.0dB
0
1
0
0
0
0
1 - 1.0dB
0
1
0
0
0
1
0 - 2.0dB
1:
1
1
0
1
1
1
0 -78.0dB
1
1
0
1
1
1
1 -79.0dB
1
1
1
X
X
X
X Mute
Diffin - mode
0
Single ended stereo
1
Differential Stereo
Note 2: It is not recommended to use a gain more than 20dB for system performance reason. In general, the max. gain should be limited by
software to the maximum value, which is needed for the system.
2.5.4 Treble Programming
MSB
LSB
BASS & TREBLE PROGRAMMING
D7
D6
D5
D4
D3
D2
D1
D0
Treble Steps
0
0
0
0 15dB
0
0
0
1 14dB
0
0
1
0 13dB
0
0
1
1 12dB
0
1
0
0 11dB
0
1
0
1 10dB
0
1
1
0
9dB
0
1
1
1
8dB
1
0
0
0
7dB
1
0
0
1
6dB
1
0
1
0
5dB
1
0
1
1
4dB
1
1
0
0
3dB
1
1
0
1
2dB
1
1
1
0
1dB
1
1
1
1
0dB
Mode
0
Cut
1
Boost
X
0
0
X
0
1
X
1
0
X
1
1
Treble Center Frequency
10KHz
12.5KHz
15KHz
17.5KHz
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