PEDL9055A-02-01
OKI Semiconductor
ML9055A-02
Function
Symbol
RESET
Type
I
Description
Reset input pin (active “L”)
Parallel/serial data setting (H = Parallel, L = Serial)
PS0
L
PS1
L
H
L
H
Interface
3-line serial interface
4-line serial interface
8080 parallel interface
6800 parallel interface
PS0
PS1
I
L
H
H
Microcomputer
Interface
CS
RS
I
I
R/W (WR)
I
E (RD)
I
DB0 to
DB7
SEG0 to
SEG127
COM0 to
COM127
TEST1
TEST2
I/O
Note: When using the serial interface, leave D0-D5 open and
connect E (RD) and R/W (WR) to V
DD
or V
SS
.
Chip select input pin (active “L”)
Register select input pin
Distinguishes between display data (H) and command data (L).
Connect this pin to V
DD
or V
SS
for 3-line serial interface.
When connected to a 68-series MPU: Read/write execute
control pin
(H = read, L = write)
When connected to an 80-series MPU: Write execute control pin
(L = write)
When connected to a 68-series MPU: E clock input pin
When connected to an 80-series MPU: Read execute control pin
(L = read)
When parallel interface is selected,
8-bit data bus pin
When serial interface is selected,
DB0 to DB5: Open
DB6(SCLK): Serial clock input
DB7(SDATA): Serial data input
LCD segment driver outputs
LCD common driver outputs
Test pin of this LSI. Connect this pin to V
DD.
Test pin of this LSI. Leave this pin open
O
O
I
O
LCD Driver
Test
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