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UPC1857ACT Datasheet(PDF) 20 Page - NEC

Part # UPC1857ACT
Description  SOUND CONTROL IC WITH SURROUND AND I2C BUS
PDF  44 Pages
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Manufacturer  NEC [NEC]
Direct Link  http://www.nec.com/
Logo NEC - NEC

UPC1857ACT Datasheet(HTML) 20 Page - NEC

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20
µµµµPC1857A
4.2
Initialization
After power application, be sure to initialize the subaddresses as shown below.
Table 4-1. Initialization of
µµµµPC1857A (recommendation value)
Bit
Subaddress
MSB
D7
D6
D5
D4
D3
D2
D1
LSB
D0
00H
000011
00
01H
0
−−
−−−−−
02H
0
−
1
00000
03H
0
−
0
10000
04H
0
−
0
10000
Caution Until initialization is completed, mute using an external unit.
Remark
− : Don’t care.
4.3
Surround Function
For how to set the surround mode, refer to the table below.
Table 4-2. Setting Surround Mode
Setting
Subaddress: 00H
Description
Surround Mode
D3
D2
Units of Phase Shifter
Effect
Simulated
0
0
4 units
Monaural to pseudo-stereo
Music
0
1
1 unit
Stereo sound to surround
Movie
1
0
4 units
OFF
1
1
−
Through
Caution When changing the surround mode, use the mute function (approx. 200 ms) for pop noise
reduction.



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