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
DD
reaches 4.5 V
RS R/W DB
7
DB
6
DB
5
DB
4
DB
3
DB
2
DB
1
DB
0
000011
****
Wait 4.1 ms or more
RS R/W DB
7
DB
6
DB
5
DB
4
DB
3
DB
2
DB
1
DB
0
000011
****
Wait 100 µs or more
End of Initialization
RS R/W DB
7
DB
6
DB
5
DB
4
DB
3
DB
2
DB
1
DB
0
000011
****
RS R/W DB
7
DB
6
DB
5
DB
4
DB
3
DB
2
DB
1
DB
0
000011NF
**
0000001000
0000000001
00000001I/DS
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
Display Off
Display Clear
Entry Mode Set
8-Bit Interface,
Single/Dual Line
Display, Display Font
Caution: At this point,
the display format
an't be changed.
LCD21-10
Figure 3. 8-Bit Interface
Dot-Matrix LCD Units
Display Unit User’s Manual 13
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