ST7066U
#" For 8-bit interface data, all eight bus lines (DB0 to DB7) are used.
$" Example of busy flag check timing sequence
RS
R/W
E
Internal
operation
Functioning
DB7
Data
Busy
Busy
Not Busy
Data
Instruction write
Busy flag check
Busy flag check
Busy flag check
Instruction write
$" 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
V2.0
2001/03/01
28/42