2.8인치 256x64 OLED 디스플레이

모델 번호 WEX025664A

►유형 : 그래픽
►구조 : COF
►크기 : 2.8 인치
►256x64 점 행렬
►IC：SSD1322
►3V 전원 공급 장치
►1/64 duty
►인터페이스 : 6800, 8080, SPI
►디스플레이 색상: 백색 / 노란색
►지원 그레이스케일

사양서

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설명

WEX025664A는 256×64 해상도를 지원하는 2.8인치 COF 그래픽 OLED 디스플레이 모듈입니다. SSD1322 드라이버 IC를 탑재하고 있으며, 6800, 8080, SPI 인터페이스를 지원하여 다양한 시스템 설계에 유연하게 적용할 수 있습니다. 모듈 외형 크기는 84.0 x 25.8 x 2.15 mm, 표시 영역은 69.098 x 17.258 mm입니다.

본 모듈은 산업용 장비, POS 시스템, IoT 기기, 휴대형 계측 장비, 자동차 전장, 의료 기기 등 다양한 분야에 적합합니다. 또한 기존 STN 디스플레이를 OLED로 대체하는 업그레이드 용도로도 활용할 수 있습니다.

도면

사양

기계적 특성

항목	치수	단위
도트 매트릭스	256 x 64 Dots	－
모듈 치수	84.0×25.8×2.15	mm
활성 영역	69.098×17.258	mm
픽셀 크기	0.248×0.248	mm
픽셀 피치	0.27×0.27	mm
디스플레이 모드	패시브 매트릭스
디스플레이 색상	단색
구동 듀티비	1/64 Duty
IC	SSD1322 (COF)
인터페이스	6800, 8080, SPI
크기(대각선)	2.8 inch

절대 최대 정격

항목	기호	최소값	최대값	단위
로직 전원 전압	VDD	-0.5	2.75	V
저전압 전원	VCI	-0.3	4.0	V
I/O 전원 전압	VDDIO	-0.5	VCI	V
디스플레이 구동 전압	VCC	-0.5	20.0	V
동작 온도	TOP	-40	+80	°C
보관 온도	TSTG	-40	+85	°C

전기적 특성

항목	기호	조건	최소값	전형값	최대값	단위
로직 전원 전압	VCI	Note	2.8	3.0	3.3	V
디스플레이 전원 전압	VCC	－	14	14.5	15	V
입력 High 전압	VIH	－	0.8×VDDIO	－	VDDIO	V
입력 Low 전압	VIL	－	0	－	0.2×VDDIO	V
출력 High 전압	VOH	－	0.9×VDDIO	－	VDDIO	V
출력 Low 전압	VOL	－	0	－	0.1×VDDIO	V
50% 보드 동작 전류		VCC =14.5V	25	30	32	mA

인터페이스 핀 기능

Pin Number

기호

I/O

기능

Power Supply

VCI

Power Supply for Operation
This is a voltage supply pin. It must be connected to external source & always be equal to or higher than VDD & VDDIO.

VDD

Power Supply for Core Logic Circuit
This is a voltage supply pin. It can be supplied externally (within the range of 2.4~2.6V) or regulated internally from VCI. A capacitor should be connected between this pin & VSS under all circumstances.

VDDIO

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 VDDIO. When I/O signal pins (BS0~BS1, D0~D7, control signals…) pull high, they should be connected to VDDIO.

VSS

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

Power 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

Ground of Analog Circuit
These are the analog ground pins. They should be connected to VSS externally.

Driver

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 10uA.

VCOMH

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.

VSL

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

This pin is No Connection pins. Nothing should be connected to this pin. This pin should be left open individually.

BS0

Communicating Protocol Select
These pins are MCU interface selection input. See the following table:

	BS0	BS1
3-wire SPI	1	0
4-wire SPI	0	0
8-bit 68XX Parallel	1	1
8-bit 80XX Parallel	0	1

BS1

RES#

Power Reset for Controller and Driver
This pin is reset signal input. When the pin is low, initialization of the chip is executed.

CS#

Chip Select
This pin is the chip select input. The chip is enabled for MCU communication only when CS# is pulled low.

D/C#

Data/Command Control
This pin is Data/Command control pin. When the pin is pulled high, the input at D7~D0 is treated as display data.
When the pin is pulled low, the input at D7~D0 will be transferred to the command register. For detail relationship to MCU interface signals, please refer to the Timing Characteristics Diagrams.

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.
When serial mode is selected, this pin must be connected to VSS.

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.
When serial mode is selected, this pin must be connected to VSS.

6~13

D7~D0

I/O

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.
Unused pins must be connected to VSS except for D2 in serial mode.

Reserve

N.C.

Reserved Pin
The N.C. pin between function pins are reserved for compatible and flexible design.

1,30

N.C. (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.