TDA7409 查看數據表（PDF） - STMicroelectronics
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产品描述 (功能)
比赛名单
TDA7409 Datasheet PDF : 25 Pages
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TDA7409
2.5 DATA BYTE SPECIFICATION
2.5.1 Input Selector / Gain
MSB
LSB
D7
D6
D5
D4
D3
D2
D1
D0
FUNCTION
Source Selector
0
0
0 Not used
0
0
1 Single Ended 1
0
1
0 Mute
0
1
1 Single Ended 2
1
0
0 Single Ended 4
1
0
1 Single Ended 3
1
1
0 Mute
1
1
1 Beep
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
0
0
0
0
1
0
0
1
0
1
0
1
0
0
1
0
1
1
0
1
1
0
0
0
1
1
0
1
0
1
1
1
0
0
1
1
1
1
1
X
X
X
0
1
X
X
X
1
Input Gain
0dB
1dB
2dB
3dB
4dB
5dB
6dB
7dB
8dB
9dB
10dB
11dB
12dB
13dB
14dB
16dB
18dB
20dB
2.5.2 Loudness
MSB
LSB
D7
D6
D5
D4
D3
D2
D1
D0
LOUDNESS
Attenuation
0
0
0
0 0 dB
0
0
0
1 -1 dB
:
:
:
::
1
1
1
0 -14 dB
1
1
1
1 -15 dB
0
0
0
0
1
1
0
1
1
Filter / Center Frequency
off(flat) 'D6 must be = 0'
400Hz
800Hz
2.4KHz
Shape
0
Low Boost
1
Low & High Boost
SoftStep-Volume
0
off
1
on
Note 1: The attenuation is specified at high frequencies. Around the center frequency the value is different depending on the programmed
attenuation (see Loudness-frequency-response).
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