2.8英寸 256x64 图形OLED显示模块

型号 WEX025664A

►类型:点阵图形
►结构:COF
►尺寸:2.8寸
►256x64点阵
►IC：SSD1322
►+3V电源电压
►1/64 duty
►接口:6800，8080，SPI
►发光颜色: 白色 / 黄色
►支持灰度

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产品叙述

WEX025664A 是一款采用薄膜覆晶（Chip-on-Film，COF）结构的2.8英寸图形OLED显示屏模组，分辨率为256x64。模组外形尺寸为84.0 × 25.8 × 2.15 mm，有效显示区域为69.098 × 17.258 mm。其长条形显示区域适用于安装空间有限、需要显示文字、图形和状态信息的设备设计。

这款256x64 OLED显示屏内置SSD1322驱动IC，支持8位6800/8080并行接口及3线/4线SPI接口，可连接不同的主控系统。模组还支持灰阶显示，能够通过不同亮度层次呈现图形内容。驱动方式为1/64 Duty，提供白色和黄色两种显示颜色选项。

WEX025664A的低压电源（VCI）范围为2.8V至3.3V（典型值3.0V），显示驱动电压（VCC）为14V至15V（典型值14.5V）。在设计电源及接口电路时，需要考虑上述供电要求。

WEX025664A适用于工业设备、嵌入式系统、手持式仪器及本地监控界面，可在有限的面板空间内显示文字、图形指示及设备状态信息。这类显示需求也适用于服务器前面板设计，需要结合可用空间和实际显示内容进行评估。

如需进一步了解OLED显示屏在2U服务器前面板中的集成应用，可参阅技术文章：PMOLED 在 2U 服务器本地监控界面中的应用与设计。

规格图

产品规格

规格说明

项目	尺寸	单位
点阵	256 x 64 Dots	－
模块尺寸	84.0×25.8×2.15	mm
有效区域	69.098×17.258	mm
像素大小	0.248×0.248	mm
像素间距	0.27×0.27	mm
显示模块	被动矩阵
显示颜色	单色
驱动方式	1/64 Duty
IC	SSD1322 (COF)
接口	6800, 8080, SPI
尺寸	2.8 英寸

最大绝对额定值

参数	符号	最小值	最大值	单位
逻辑电源电压	VDD	-0.5	2.75	V
低压电源	VCI	-0.3	4.0	V
输入/输出Pin供电电压	VDDIO	-0.5	VCI	V
显示电源电压	VCC	-0.5	20.0	V
工作温度	TOP	-40	+80	°C
储存温度	TSTG	-40	+85	°C

电气特性

项目	符号	条件	最小值	典型值	最大值	单位
逻辑电源电压	VCI	Note	2.8	3.0	3.3	V
显示电源电压	VCC	－	14	14.5	15	V
输入高准位	VIH	－	0.8×VDDIO	－	VDDIO	V
输入低准位	VIL	－	0	－	0.2×VDDIO	V
输出高准位	VOH	－	0.9×VDDIO	－	VDDIO	V
输出低准位	VOL	－	0	－	0.1×VDDIO	V
50% 设备运行电流		VCC =14.5V	25	30	32	mA

Pin功能定义

Pin Number

符号

I/O

功能说明

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.