bd9202efs ROHM Co. Ltd., bd9202efs Datasheet - Page 7

• Manufacturer Part Number: bd9202efs
• Description: White Backlight Led Drivers For Medium To Large Lcd Panels Swreg Type
• Manufacturer: ROHM Co. Ltd.

© 2009 ROHM Co., Ltd. All rights reserved.
BD9202EFS
www.rohm.com
CPUCLK
○ Serial interface section
CPUDO
CPUCS
CPUDI
CPUCLK
CPUDO
CPUCS
CPUDI
This IC is controlled by 4 line serial interfaces of CPUCLK, CPUCS,CPUDI and CPUDO. The data entry format and
timing are shown below.
・It does not correspond to the continual entry of the data. It is necessary to set CPUCS into L in every address.
・There is no function of the automatic increment of address.
・Address width is correspondence to 6bit, but please do not access the address other than 00h-11h absolutely.
In the case of WRITE
In the case of READ
CPUCLK Periods
CPUCLK high level width
CPUCLK low level width
CPUDI input set up time
CPUDI input hold time
CPUCS input set up time
CPUCS input hold time
CPUDO Output delay time
AC electric quality
t
DIS
t
t
CSS
DIS
t
CSS
W
1
R
1
t
Function
DIH
A5
t
DIH
2
A5
2
A4
3
A4
Hi-Z
3
A3
A3
4
t
CYC
4
t
CYC
A2
A2
5
Symbol
5
t
t
ｔ
ｔ
t
ｔ
ｔ
ｔ
CLKH
CLKL
CYC
ＣSＨ
ＤOＤ
ＣSＳ
ＤIＳ
ＤIＨ
A1
A1
6
6
A0
t
CLKH
A0
7
t
CLKH
Min
100
7
35
35
50
50
50
50
t
7/19
CLKL
-
t
*
CLKL
Hi-Z
8
*
8
D7
D7
t
9
*
DOD
9
Typ
Limit
-
-
-
-
-
-
-
-
D6
10
D6
*
10
D5
11
D5
（Output load：15pF）
*
11
Max
D4
40
-
-
-
-
-
-
-
D4
12
*
12
D3
13
D3
*
13
D2
Unit
ｎｓ
ｎｓ
ｎｓ
ｎｓ
ｎｓ
ｎｓ
ｎｓ
ｎｓ
D2
14
*
14
D1
15
D1
*
15
Technical Note
D0
2009.04 - Rev.A
16
*
16
D0
t
CSH
t
CSH
Hi-Z