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BU2090F-E2 View Datasheet(PDF) - ROHM Semiconductor

Part NameBU2090F-E2 ROHM
ROHM Semiconductor ROHM
DescriptionSerial / Parallel 2-input Drivers
BU2090F-E2 Datasheet PDF : 13 Pages
1 2 3 4 5 6 7 8 9 10 Next Last
BU2098F, BU2090F, BU2090FS
Technical Note
Write DATA
Send the stave address from master following the start condition (S). This address consists of 7 bits. The left 1 bit (the foot
bit) is fixed “0”. The stop condition (P) is needed to finish the data transferred. But the re-send starting condition (Sr)
enables to transfer the data without STOP (P).
S slave address R/W ACK DATA ACK P
S slave address
“0” (Write)
R/W ACK DATA ACK Sr slave address
R/W ACK DATA ACK P
“0” (Write)
“0” (Write)
Fig.4 DATA transmit
Data format
The format is following.
S A6 A5 A4 A3 A2 A1 A0 R/W ACK D7 D6 D5 D4 D3 D2 D1 D0 ACK P
SLAVE ADDRESS
WRITE DATA
Slave address
Write Data
A0A2
A3A6
R/W
D0D7
Table 1 for WRITE format
Each bit can be defined by the input levels of pins A0A3.
These 4 bits are fixed.
“0”
Write “1” to D0 makes Q0 pin High-impedance. And write “0” makes Q0 pin
LOW. D[1:7] and Q[1:7] are same as D0 and Q0.
Table 2 for (A2, A1, A0) to SLAVE ADDRESS
A6
A5
A4
A3
A2
A1
A0
Slave address
0
1
1
1
0
0
0
38H
0
1
1
1
0
0
1
39H
0
1
1
1
0
1
0
3AH
0
1
1
1
0
1
1
3BH
0
1
1
1
1
0
0
3CH
0
1
1
1
1
0
1
3DH
0
1
1
1
1
1
0
3EH
0
1
1
1
1
1
1
3FH
Fixed for BU2098F
Defined by external pin A0A2
www.rohm.com
© 2009 ROHM Co., Ltd. All rights reserved.
7/12
2009.06 - Rev.A
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