
BH2223FV,BH2221FV
Technical Note
4/7
www.rohm.com
2010.06 - Rev.B
2010 ROHM Co., Ltd. All rights reserved.
●Equivalent Circuit
Terminal
Equivalent Circuit
Terminal
Equivalent Circuit
AO1
~
AO12
DI
CLK
LD
Fig.4 Equivalent Circuit
●Operation Description
Command Transmission
The Control command consists of 3 lines of 12bit serial input data (MSB first).
Data is read at the rising edge of the CLK, and output data is determined in LD High area and held in the LD Low area.
Fig.5
Data Settings
D0
D1
D3
D4
D5
D6
D7
Setting
0
GND
1
0
(VCC or VDD-GND)/256x1
0
1
0
(VCC or VDD-GND)/256x2
1
0
(VCC or VDD -GND)/256x3
0
1
0
(VCC or VDD -GND)/256x4
~
0
1
(VCC or VDD -GND)/256x254
1
(VCC or VDD -GND)/256x255
Channel Settings
D8
D9
D10
D11
BH2223FV
BH2221FV
0
Inconsequential
0
1
AO1
0
1
0
AO2
0
1
AO3
0
1
0
AO4
0
1
0
1
AO5
0
1
0
AO6
0
1
AO7
1
0
AO8
1
0
1
AO9
1
0
1
0
AO10
1
0
1
Inconsequential
AO11
1
0
Inconsequential
AO12
1
0
1
Inconsequential
1
0
Inconsequential
1
Inconsequential
LD
CLK
DI
D11
X
1
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
2
3
4
56789
10
11
12
GND
VCC
GND
VCC