OLED-256Y064A-GPP3N00000
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Revision: 13-Oct-16 2Document Number: 37958
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INTERFACE PIN FUNCTION
PIN NO. SYMBOL I/O FUNCTION
POWER SUPPLY
26 VCI P
Power supply for operation
This is a voltage supply pin. It must be connected to external source and always be equal to or higher
than VDD and VDDI/O.
25 VDD P
Power supply for core logic circuit
This is a voltage supply pin. It can be supplied externally (within the range of 2.4 V to 2.6 V) or regulated
internally from VCI. A capacitor should be connected between this pin and VSS under all circumstances.
24 VDDI/O P
Power supply for I/O pin
This pin is a power supply pin of I/O buffer. It should be connected to VDD or external source. All
I/O signal should have VIH reference to VDDI/O. When I/O signal pins (BS0 to BS1, D0 to D7, control
signals…) pull high, they should be connected to VDDI/O.
2V
SS P
Ground of logic circuit
This is a ground pin. It also acts as a reference for the logic pins. It must be connected to external
ground.
3, 29 VCC PPower supply for OLED panel
These are the most positive voltage supply pin of the chip. They must be connected to external source.
5, 28 VLSS PGround of analog circuit
These are the analog ground pins. They should be connected to VSS externally.
DRIVER
22 IREF I
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 10 μA.
4V
COMH P
Voltage output high level for COM signal
This pin is the input pin for the voltage output high level for COM signals. A tantalum capacitor should
be connected between this pin and VSS.
27 VSL P
Voltage output low level for SEG signal
This is segment voltage reference pin. When external VSL is not used, this pin should be left open. When
external VSL is used, this pin should connect with resistor and diode to ground.
TESTING PADS
21 FR O
Frame frequency triggering signal
This pin will send out a signal that could be used to identify the driver status. Nothing should be
connected to this pin. It should be left open individually.
16 BS0
I
Communicating protocol select
These pins are MCU interface selection input. See the following table:
3-wire SPI 4-wire SPI 8-bit 68XX parallel 8-bit 80XX parallel
17 BS1
BS0 1 0 1 0
BS1 0 0 1 1
20 RES# I Power reset for controller and driver
This pin is reset signal input. When the pin is low, initialization of the chip is executed.
19 CS# I
Chip select
This pin is the chip select input. The chip is enabled for MCU communication only when CS# is pulled
low.
18 D / C# I
Data / command control
This pin is data / command control pin. When the pin is pulled high, the input at D7 to D0 is treated as
display data. When the pin is pulled low, the input at D7 to D0 will be transferred to the command
register. For detail relationship to MCU interface signals, please refer to the timing characteristics
diagrams.
14 E / RD# I
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. When serial mode is
selected, this pin must be connected to VSS.