Technical Note
7/15
www.rohm.com
2010.10 - Rev.
© 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)
