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BD3461FS датащи(PDF) 11 Page - Rohm

номер детали BD3461FS
подробное описание детали  General-Purpose Electronic Volume with Built-in Advanced Switch
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производитель  ROHM [Rohm]
домашняя страница  http://www.rohm.com
Logo ROHM - Rohm

BD3461FS датащи(HTML) 11 Page - Rohm

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Technical Note
11/28
BD3460FS,BD3461FS,BD3464FV,BD3465FV
www.rohm.com
2011.04 - Rev.B
© 2010 ROHM Co., Ltd. All rights reserved.
(2)I
2C BUS FORMAT
MSB
LSB
MSB
LSB
MSB
LSB
S
Slave Address
A
Select Address
A
Data
A
P
1bit
8bit
1bit
8bit
1bit
8bit
1bit 1bit
S
= Start conditions (Recognition of start bit)
Slave Address
= Recognition of slave address. 7 bits in upper order are voluntary.
The least significant bit is “L” due to writing.
A
= ACKNOWLEDGE bit (Recognition of acknowledgement)
Select Address
= Select every of volume, bass and treble.
Data
= Data on every volume and tone.
P
= Stop condition (Recognition of stop bit)
(3)I
2C BUS Interface Protocol
1)Basic form
S
Slave Address
A
Select Address
A
Data
A
P
MSB
LSB
MSB
LSB
MSB
LSB
2)Automatic increment (Select Address increases (+1) according to the number of data.
S
Slave Address
A
Select Address
A
Data1
A
Data2
A
・・・・
DataN
A
P
MSB
LSB
MSB
LSB
MSB LSB
MSB
LSB
MSB LSB
(Example)
Data1 shall be set as data of address specified by Select Address.
Data2 shall be set as data of address specified by Select Address +1.
DataN shall be set as data of address specified by Select Address +N-1.
3)Configuration unavailable for transmission (In this case, only Select Address1 is set.
S
Slave Address
A
Select Address1
A
Data
A
Select Address 2
A
Data
A
P
MSB
LSB MSB
LSB
MSB LSB
MSB
LSB
MSB LSB
(Note)If any data is transmitted as Select Address 2 next to data, it is recognized
as data, not as Select Address 2.
(4)Slave address
Because the slave address can be changed by the setting of CS, it is possible to use two chips at the same time on
identical BUS.
MSB
LSB
SEL Voltage Condition
A6
A5
A4
A3
A2
A1
A0
R/W
GND ~ 0.2×VCC
1
0
0
0
0
0
0
0
0.8×VCC ~ VCC
1
0
0
0
0
1
0
0
Establish the voltage of CS in the condition to have been defined.
80H
84H


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