37
LH155BA
(At the time of reset : (DU1, DU0, BS1, BS0) = 0
H
, read address : E
H
)
D
0
BS0
D
1
BS1
D
2
DU0
D
3
DU1
D
4
0
D
5
1
D
6
1
D
7
1
CSB
0
RE
1
RDB
1
WRB
0
RS
1
* mark means "Don't care".
(At the time of reset : (RE) = 0
H
, read address : F
H
)
RE Command
RE = "0" : The power supply selection for the
segment display, duty ratio selection and
boosted voltage level selection cannot
be accessed.
RE = "1" : The extended function is set. The power
supply selection for the segment display,
duty ratio selection and boosted voltage
level selection can be accessed.
D
0
RE
D
1
*
D
2
*
D
3
*
D
4
1
D
5
1
D
6
1
D
7
1
(1) BS Command
Command for bias setting.
Select boost voltage level below.
(2) DUTY Command
Command for duty setting.
Select duty ratio below.
Do not set BS1 = "1", BS0 = "0".
4.15. RE Register Set
BS1
BOOSTED
VOLTAGE LEVEL
4 times
3 times
2 times
Prohibition
1
1
0
1
1
0
0
0
When data set up in the internal registers are read
out, set the read address allotted to each register
by this command before executing the read
command of the internal registers.
For example, when the data of the command
register in the display control (1) are read out, set
the values of (RA3, RA2, RA1, and RA0 ) = 8
H
.
Refer to the functional description of each
command or the list of commands for the read
address allotted to each command register.
4.16. Address Set for Internal Register Read
D
5
D
6
D
7
1
1
0
(At the time of reset : (
RA
3,
RA
2,
RA
1,
RA
0) = C
H
)
DU1
0
DUTY RATIO
1/64
1/48
1/32
1/16
1
1
0
1
1
0
0
CSB
0
RE
0/1
RDB
1
WRB
0
RS
1
D
0
RA0
D
1
RA1
D
2
RA2
D
3
RA3
D
4
0
CSB
0
RE
0
RDB
1
WRB
0
RS
1
BS0
DU0