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PT7313E データシート(PDF) 8 Page - Princeton Technology Corp

部品番号 PT7313E
部品情報  Stereo Audio Processor for Car Audio
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メーカー  PTC [Princeton Technology Corp]
ホームページ  http://www.princeton.com.tw
Logo PTC - Princeton Technology Corp

PT7313E データシート(HTML) 8 Page - Princeton Technology Corp

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PT7313E
V1.0
8
February 2010
FUNCTION DESCRIPTION
MASTER VOLUME
The table below gives a detailed description of the Master Volume Data Bytes. For example, a volume of -37.5dB is given
by 0 0 0 1 1 1 1 0.
MSB
LSB
Function
0
0
B2
B1
B0
A2
A1
A0
1.25dB/step
0
0
0
0
0
0
1
-1.25
0
1
0
-2.5
0
1
1
-3.75
1
0
0
-5
1
0
1
-6.25
1
1
0
-7.5
1
1
1
-8.75
0
0
B2
B1
B0
A2
A1
A0
10dB/step
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
SPEAKER ATTENUATORS
The speaker attenuator in most of car audio system is performs balance and fader function, the table below gives a
detailed description of the speaker attenuators data bytes. Total control range of the speaker attenuator is from 0dB to
-37.5dB.
Example 1, an attenuation gain of -6.25dB on the Speaker Right Rear channel is combined 0dB and -6.25dB, therefore
it should be given by: 1 1 1 0 0 1 0 1.
Example 2, an attenuation gain of -32.5dB on the Speaker Left Front channel is combined -30dB and -2.5dB, therefore it
should be given by: 1 0 0 1 1 0 1 0.
MSB
LSB
Function
1
0
0
B1
B0
A2
A1
A0
Speaker LF
1
0
1
B1
B0
A2
A1
A0
Speaker RF
1
1
0
B1
B0
A2
A1
A0
Speaker LR
1
1
1
B1
B0
A2
A1
A0
Speaker RR
0
0
0
0
0
0
1
-1.25
0
1
0
-2.5
0
1
1
-3.75
1
0
0
-5
1
0
1
-6.25
1
1
0
-7.5
1
1
1
-8.75
0
0
0
0
1
-10
1
0
-20
1
1
-30
1
1
1
1
1
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