Table of Contents
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Initialization by Instructions
If the power conditions for the normal operation
of the internal reset circuit are not satisfied (see
Table 11), then LCD unit must be initialized by
executing a series of instructions. The procedure
for this initialization process is as follows:
Power ON
Wait 15 ms or more
after V
reaches 4.5 V
DD
RS R/W DB
DB
DB
7
6
5
0
0
0
0
1
Wait 4.1 ms or more
RS R/W DB
DB
DB
7
6
5
0
0
0
0
1
Wait 100 µs or more
RS R/W DB
DB
DB
7
6
5
0
0
0
0
1
RS R/W DB
DB
DB
7
6
5
0
0
0
0
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
End of Initialization
Display Unit User's Manual
DB
DB
DB
DB
DB
4
3
2
1
0
1
*
*
*
*
DB
DB
DB
DB
DB
4
3
2
1
0
1
*
*
*
*
DB
DB
DB
DB
DB
4
3
2
1
0
1
*
*
*
*
DB
DB
DB
DB
DB
4
3
2
1
0
1
N
F
*
*
0
1
0
0
0
0
0
0
0
1
0
0
1
I/D
S
Figure 3. 8-Bit Interface
Busy flag can't be checked before execution of this
instruction
Function Set (8-Bit Interface)
Busy flag can't be checked before execution of this
instruction
Function Set (8-Bit Interface)
Busy flag can't be checked before execution of this
instruction
Function Set (8-Bit Interface)
(a) Busy flag can be checked after the following instructions
are completed. If the busy flag is not going to be checked,
then a wait time longer than the total execution time of
these instructions is required (See Table 7.)
Function Set
8-Bit Interface,
Single/Dual Line
Display Off
Display, Display Font
Display Clear
Entry Mode Set
Dot-Matrix LCD Units
Caution: At this point,
the display format
an't be changed.
LCD21-10
13
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