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BU2098F

TSZ02201-0RHR1GZ00100-1-2

© 2013 ROHM Co., Ltd. All rights reserved.

01.Sep.2015 Rev.002

TSZ22111・15・001

www.rohm.com

Function – continued

1.4 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).

Figure 11. DATA transmit

1.5 Data format

The format is following.

Figure 12. Data format

Table 1. for WRITE format

Slave address

A0 to A2

Each bit can be defined by the input levels of pins A0 to A3.

A3 to A6

These 4 bits are fixed.

R/W

“0”

Write Data

D0 to D7

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

S

slave address

R/W

ACK

DATA

ACK

P

S

slave address

R/W

ACK

DATA

ACK

Sr

slave address

R/W

ACK

DATA

ACK

P

S

A6

A5

A4

A3

A2

A1

A0

R/W ACK

D6

D5

D4

D3

D2

D1

D0

D7

ACK

P

SLAVE ADDRESS

WRITE DATA

Fixed for BU2098F

Defined by external pin A0～A2

“0” (Write)

“0” (Write)

“0” (Write)