AN.No.G1216B1N000-3D0E
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3. OPERATING INSTRUCTIONS
3.1 Terminal Functions
8I/O MPU Common terminal for tristate inp ut and output, and data bus.
Functions
Destination
I/O
QTY
Signal
DB0 to DB7
E 1 Enable
Write (R/W=0):Latches data of DB0 to DB7 at the fall of E.
Read (R/W=1):Outputs data to DB0 to DB7 while “E” keeps a
high level.
Input MPU
R/W 1 Input MPU Read/Write selection
R/W=1: When E=1 and CS1=0 or CS2=0, the data is ou t put
to DB0 to DB7 and read is available by MPU.
R/W=0: When CS1=0 or CS2=0, DB0 to DB7 are ready for
receiving the input.
D/I 1 Input MPU Data/Instruction selection
D/I=1: Indicates that the data in DB0 to DB7 is the display
data.
D/I=0: Indicates that the data in DB0 to DB7 is the instruction
code.
CS1, CS2 2 Input MPU
Chi
p se
l
ect
i
nput.
D
ata
i
nput an
d
output
i
s poss
ibl
e un
d
er
the following status:
Terminal No.
Status
RST 1 Input MPU Reset signal
Setting the RST signal to a low level allows for initial setup.
(1) ON /OFF register: 0 setup (display OFF)
(2) Di s play st ar t line register: 0 line setup (display sta r t s
from 0 line)
The setup status is retained until the status is changed by an
instruction after reset is released.
VDD 1 Power Power terminal for logic (+5 V)
VSS 1 Power GND terminal (0 V)
VLC 1 Power Power terminal for LC drive
LEDA 1 Power LED backlight anode terminal
1FGND terminal is connected to the metallic frame of the module. Use this terminal when
grounding the frame.
LEDC 1 Power LED backlight cathode terminal
FGND 1Frame ground1
CS2CS1
LCM display screen
CS1
0
CS2
0
CS1
:
C
ontro
l
s t
h
e
LCM
l
e
f
t
h
a
lf
di
sp
l
ay screen
(SEG1
to
SEG64).
CS2: Controls the LCM right half display screen ( SEG65 to
SEG128).
Table 1 Terminal Functions