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产品叙述
WEX025664B 是一款采用 Chip-on-Film（COF）结构的 3.12 英寸图形 OLED 显示模块，分辨率为 256×64 像素。模块外形尺寸为 88.0 × 27.8 × 2.15 mm，有效显示区域为 76.778 × 19.178 mm。其长条形显示设计适用于安装空间有限，需要显示文字、图形及设备状态信息的设备。
这款 256x64 OLED 显示屏搭载 SSD1322 驱动 IC，支持 6800/8080 8-bit 并行接口及 3-wire/4-wire SPI 接口，可连接不同的主控系统。模块支持 4-bit 灰阶显示，能够以不同亮度等级呈现图形信息，采用 1/64 Duty 驱动方式。工作温度范围为 -40°C ~ +80°C，存储温度范围为 -40°C ~ +85°C。
WEX025664B 的逻辑电源电压（VDD）为 2.4V ~ 2.6V（典型值 2.5V），低压电源电压（VCI）为 2.4V ~ 3.5V（典型值 3.0V），显示驱动电压（VCC）为 11.5V ~ 15V（典型值 14.5V）。I/O 电源电压（VDDIO）范围为 1.65V ~ VCI（典型值 3.0V）。设计电源及接口电路时，应考虑上述电压要求。
WEX025664B 适用于工业设备、嵌入式系统、测量仪表、手持式仪器、POS 系统、IoT 设备、通信设备及医疗仪器等需要小型图形 OLED 显示屏及灰阶显示功能的应用。此外，该模块也可用于服务器前面板的本地监控界面，设计时可根据前面板的可用空间及需要显示的信息进行评估。
如需不同的结构配置或触控功能，可参考以下相关型号：
- WEX025664B-CTP：COF 结构，配备 CTP 电容式触摸屏，不含金属框和 PCB。
- WEN025664B：COF 结构，配备金属框和 PCB。
- WEN025664B-CTP：COF 结构，配备金属框、PCB 及 CTP 电容式触摸屏。
如需进一步了解 OLED 显示屏在 2U 服务器前面板中的应用及设计要点，请参阅技术文章 PMOLED 在 2U 服务器本地监控界面中的应用与设计。
规格图
Data source ref: WEX025664BWPP3N00000
产品规格
规格说明
| 项目 | 尺寸 | 单位 |
|---|---|---|
| 点阵 | 256 x 64 Dots | － |
| 模块尺寸 | 88.0 × 27.8 × 2.15 | mm |
| 有效区域 | 76.778×19.178 | mm |
| 像素大小 | 0.278×0.278 | mm |
| 像素间距 | 0.3×0.3 | mm |
| 显示模式 | 被动矩阵 | |
| 发光颜色 | 单色 | |
| 驱动方式 | 1/64 Duty | |
| 灰阶 | 4 bits | |
| IC | SSD1322 (COF) | |
| 接口 | 6800, 8080, SPI | |
| 尺寸 | 3.12 寸 | |
最大绝对额定
| 参数 | 符号 | 最小值 | 最大值 | 单位 |
|---|---|---|---|---|
| 工作电源电压 | VCI | -0.3 | 4 | V |
| 逻辑电源电压 | VDD | -0.5 | 2.75 | V |
| I/O pin 供电电压 | VDDIO | -0.5 | VCI | V |
| 显示电源电压 | VCC | -0.5 | 20 | 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 | VDD | － | 2.4 | 2.5 | 2.6 | V |
| I/O Pin 电源 | VDDIO | － | 1.65 | 3.0 | VCI | V |
| 低压电源 | VCI | － | 2.4 | 3.0 | 3.5 | V |
| 显示电源电压 | VCC | － | 11.5 | 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%显示画面耗电流 | ICC | VCC =12V | － | 24 | 32 | mA |
| VCC =14.5V | － | 32 | 42.5 | mA |
Pin功能定义
| Pin Number | 符号 | I/O | 功能说明 | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | N.C. (GND) | P | Ground | ||||||||||
| 2 | VSS | P | Ground. | ||||||||||
| 3 | VCC | P | Power supply for panel driving voltage. This is also the most positive power voltage supply pin. |
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| 4 | VCOMH | P | COM signal deselected voltage level. A capacitor should be connected between this pin and VSS. |
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| 5 | VLSS | P | Analog system ground pin. | ||||||||||
| 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. |
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| 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. |
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| 15 | R/W# | I | 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. |
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| 16 | BS0 | I | Communicating Protocol Select These pins are MCU interface selection input. See the following table:
(1) 0 is connected to VSS (2) 1 is connected to VDDIO |
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| 17 | BS1 | ||||||||||||
| 18 | D/C# | I | Data/Command Control This pin is Data/Command control pin connecting to the MCU. When the pin is pulled HIGH, the content at D[7:0] will be interpreted as data. When the pin is pulled LOW, the content at D[7:0] will be interpreted as command. |
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| 19 | CS# | I | Data/Command Control This pin is the chip select input connecting to the MCU. The chip is enabled for MCU communication only when CS# is pulled LOW. |
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| 20 | RES# | I | This pin is reset signal input. When the pin is pulled LOW, initialization of the chip is executed. Keep this pin pull HIGH during normal operation. |
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| 21 | FR | O | This pin is No Connection pins. Nothing should be connected to this pin. This pin should be left open individually. | ||||||||||
| 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 10uA. |
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| 23 | N.C. | - | Reserved Pin The N.C. pin between function pins are reserved for compatible and flexible design. |
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| 24 | VDDIO | P | Power Supply for I/O Pin It should be matched with the MCU interface voltage level. |
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| 25 | VDD | P | Power Supply for Core Logic Circuit Power supply pin for core logic operation. A capacitor is required to connect between this pin and VSS |
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| 26 | VCI | P | Power Supply for Operation VCI must always be equal to or higher than VDD and VDDIO. |
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| 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. |
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| 28 | VLSS | P | Ground of Analog Circuit These are the analog ground pins. They should be connected to VSS externally. |
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| 29 | VCC | P | Power Supply for OLED Panel These are the most positive voltage supply pin of the chip. They must be connected to external source. |
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| 30 | N.C. (GND) | P | Ground |