Technical Note

7/15

www.rohm.com

2010.10 - Rev.A

© 2010 ROHM Co., Ltd. All rights reserved.

BD3403FV,BD3861FS,BD3883FS

(BD3883FS)

・

Basic Configuration of Control Data Format

 Data input direction

MSB

LSB

Data

D9

D8

D7

D6

D5

D4

D3

D2

D1

D0

Data

Select Address

・

Control Data Formats

 Data input direction

Select Address

Data(1)

D9

D8

D7

D6

D5

D4

D3

D2

D1

D0

Input Gain

Input Selector

Treble fc

0

0

Data(2)

D9

D8

D7

D6

D5

D4

D3

D2

D1

D0

Front Volume A

Front Volume B

*

0

1

Data(3)

D9

D8

D7

D6

D5

D4

D3

D2

D1

D0

Bass Gain

Treble Gain

1

0

Data(4)

D9

D8

D7

D6

D5

D4

D3

D2

D1

D0

Middle Gain

Time

Constan

t Select

REC

OUT

Surroun

d

Rear

Volume

1

1

○

* indicates 0 or 1.

・

By changing the setting of Select Address, four different control formats are selectable. (BD3883FS)

・

At power-on sequence, initialize all data.

Example:

 Data input direction

MSB

LSB

MSB

LSB MSB

LSB

MSB

LSB

Data(1)

L

Data(2)

L

Data(3)

L

Data(4)

L

“L” means a “latch.”

・

After power-on, for the second and subsequent times, only the necessary data can be selected for setting.

Example: When changing the volume:

 Data input direction

MSB

LSB

Data(2)

L

“L” means a “latch.”

・

RECOUT, Surround and Rear Volume in Data(4) are Soft-switched using time constants. (BD3883FS)