2
4-bit interface
z
bus lines DB0-DB3 disabled
z
4 high order bits followed by 4 low order bits
Display addressing
Display position
1
2
3
4
5
…
39
40
DDRAM address
(row 1)
00
01
02
03
04
…
26
27
DDRAM address
(row 2)
40
41
42
43
44
…
66
67
Instruction Set
1.
Designate functions
(display format, data length etc.)
2.
Set internal RAM address
D t t
f
3.
Data transfer
4.
Miscellaneous functions
s
6 inst
uct
ions
1 t
clock t
ick
@
16MHz
=
62.
5
ns
1us
=
1000us/
(62.
5ns/
inst
r) =
1
6
37us =
592
in
st
ruct
io
ns
Instructions - Legend
Internal Reset Procedure
1. Display clear
2. Function set:
DL = 1; 8-bit interface data
N = 0; 1-line display
F = 0; 5 x 8 dot character font
3. Display on/off control:
D = 0; Display off
C = 0; Cursor off
B = 0; Blinking off
4. Entry mode set:
I/D = 1; Increment by 1
S = 0; No shift
