BH2226F ROHM [Rohm], BH2226F Datasheet - Page 5

• Manufacturer Part Number: BH2226F
• Description: Standard 8bit 8ch Type D/A Converters
• Manufacturer: ROHM [Rohm]

●Operation Description
© 2009 ROHM Co., Ltd. All rights reserved.
BH2226FV,BH2226F
www.rohm.com
・Command Transmission
Data Settings
Channel Settings
The Control command consists of 3 lines of 12bit serial input data (MSB first).
DI data is read at the rising edge of the CLK, and becomes valid in the CSB Low area (before the CSB rise for 12bit data).
(Note)
I/O Status Setting : Set the status of the I/O input output terminal by D0 ~ D7.
Input / Output D/A Selection settings ：Each channel can be set for either I/O port or D/A converter output.
CSB
CLK
DA1
DA1
D0
D8
D0
D0
0
1
0
1
0
0
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
DI
0: I/O mode (When I/O mode is selected, set the status as well.)
1: D/A mode (Set the I/O status to output mode.)
0: input mode (High-Z status)
1: output mode
Default D[7:0]=00h
DA2
DA2
D1
D9
D1
D1
0
0
1
1
0
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
X
DA3
DA3
D10
D2
D2
D2
0
0
0
0
1
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
D11
12
D10
11
DA4
DA4
D11
D3
D3
D3
0
0
0
0
0
1
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
D9
~
10
Power down setting (default)
DA1
DA2
DA3
DA4
DA5
DA6
DA7
DA8
Power down release
Inconsequential
Inconsequential
I/O D/A select
I/O serial⇒Parallel
I/O parallel⇒Serial
I/O status setting
DA5
DA5
D4
D4
D4
0
0
0
0
0
1
1
D8
9
D7
8
DA6
DA6
D5
D5
D5
0
0
0
0
0
1
1
Setting
D6
7
Fig.4
5/9
DA7
DA7
D6
D6
D6
D5
0
0
0
0
0
1
1
6
D4
5
DA8
DA8
D7
D7
D7
0
0
0
0
0
1
1
D3
4
At D/A setting：GND
At D/A setting：(VCC-GND)/256x1
At D/A setting：(VCC-GND)/256 x 2
At D/A setting：(VCC-GND)/256 x 3
At D/A setting：(VCC-GND)/256 x 4
~
At D/A setting：(VCC-GND)/256 x 254
At D/A setting：(VCC-GND)/256 x 255
Corresponding terminals for I/O or
D/A selection
Corresponding terminals for status
setting
D2
3
D1
2
Description
Description
D0
Setting
1
X
Technical Note
2009.07 - Rev.B