11
R/W#
Read/Write Select or Write
This pin is MCU interface input. When interfacing to a
68XX-series microprocessor, this pin will be used as Read/Write
(R/W#) selection input. Pull this pin to “High” for read mode and
pull it to “Low” for write mode.
When 80XX interface mode is selected, this pin will be the Write
(WR#) input. Data write operation is initiated when this pin is
pulled low and the CS# is pulled low.
12
E/RD#
Read/Write Enable or Read
This pin is MCU interface input. When interfacing to a
68XX-series microprocessor, this pin will be used as the
Enable (E) signal. Read/write operation is initiated when this pin is
pulled high and the CS# is pulled low.
When connecting to an 80XX-microprocessor, this pin receives the
Read (RD#) signal. Data read operation is initiated when this pin is
pulled low and CS# is pulled low.
13~20
D0~D7
Host Data Input/output Bus
These pins are 8-bit bi-directional data bus to be connected to the
microprocessor’s data bus. When serial mode is selected, D1 will
be the serial data input SDIN and D0 will be the serial clock input
SCLK. When I2C mode is selected, D2 & D1 should be tired
together and serve as SDAout & SDAin in application and D0 is
the serial clock input SCL.
21
IREF
Current Reference for Brightness Adjustment
This pin is segment current reference pin. A resistor should be
connected between this pin and VSS. Set the current lower than
10ȝA.
22
VCOMH
Voltage Output High Level for COM Signal
This pin is the input pin for the voltage output high level for COM
signals. A capacitor should be connected between this pin and
VSS.
23
VCC
Power Supply for OEL Panel
This is the most positive voltage supply pin of the chip.
It must be supplied externally.
24
GND
Reserved Pin (Supporting Pin)
The supporting pins can reduce the influences from stresses on the
function pins. These pins must be connected to external ground.
