ST7066U
l
Ø
For 8-bit interface data, all eight bus lines (DB0 to DB7) are used.
Example of busy flag check timing sequence
R S
R /W
D e la y
E
( > 8 0 u s )
In te r n a l
o p e ra tio n
F u n c tio n in g
N o t
B u s y
D B 7
D a ta
B u s y
B u s y
D a ta
In s tr u c tio n w rite
B u s y fla g c h e c k
B u s y fla g c h e c k
B u s y fla g c h e c k
In s tr u c tio n w r ite
Ø
Intel 8051 interface
16
COM1 to COM16
DB0 to DB7
8
P1.0 to P1.7
P3.0
P3.1
P3.2
RS
R/W
E
40
SEG1 to SEG40
Intel 8051 Serial
ST7066U
V2.2
28/42
2006/05/11