BD3460FS

11/26

TSZ02201-0C2C0E100350-1-2

© 2015 ROHM Co., Ltd. All rights reserved.

16.Dec.2015 Rev.001

www.rohm.com

TSZ22111・15・001

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 condition (Recognition of start bit)

Slave Address

= Recognition of slave address. The first 7 bits correspond to the slave address.

The least significant bit is

“L” which corresponds to write mode.

A

= ACKNOWLEDGE bit (Recognition of acknowledgement)

Select Address

= Select address corresponding to volume, bass or treble.

Data

= Data on every volume and tone.

P

= Stop condition (Recognition of stop bit)

(a) Basic Format

S

Slave Address

A

Select Address

A

Data

A

P

MSB

LSB

MSB

LSB

MSB

LSB

(b) 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)

① Data1 shall be set as data of address specified by Select Address.

② Data2 shall be set as data of address specified by Select Address +1.

③ DataN shall be set as data of address specified by Select Address +N-1.

(c) 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

1

0

0

0

0

0

0

0

1

0

0

0

0

1

0

0

Establish the CS voltage to define the setting.

80H

84H