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產品敘述
WEX025664A 是一款 2.8 吋 COF 結構的繪圖型 OLED 顯示器模組，解析度為 256x64，採用薄膜覆晶（Chip-on-Film，COF）結構。模組外形尺寸為 84.0 × 25.8 × 2.15 mm，有效顯示區域為 69.098 × 17.258 mm。其長條形顯示區域適合安裝空間有限、需要呈現文字、圖形及狀態資訊的設備設計。
這款 256x64 OLED 顯示器內建 SSD1322 控制 IC，支援 8-bit 6800/8080 並列介面及 3-wire/4-wire SPI 介面，可連接不同的主控系統。模組亦支援灰階顯示，可透過不同亮度階調呈現圖形內容。驅動方式為 1/64 Duty，提供白色與黃色兩種顯示顏色選項。
WEX025664A 的低電壓電源（VCI）範圍為 2.8V 至 3.3V（典型值 3.0V），顯示驅動電壓（VCC）為 14V 至 15V（典型值 14.5V）。進行電源與介面電路設計時，需考量上述電壓需求。
WEX025664A 適用於工業設備、嵌入式系統、手持式儀器及本機監控介面，可在有限的面板空間內顯示文字、圖形指示及設備狀態資訊。這類顯示需求也常見於伺服器前面板設計，須依可用空間與所需顯示資訊進行評估。
如需進一步了解 OLED 顯示器在 2U 伺服器前面板的整合應用，可參閱技術文章：PMOLED 在 2U 伺服器本機監控介面的應用與設計。
規格圖
產品規格
規格說明
| 項目 | 尺寸 | 單位 |
|---|---|---|
| 點陣 | 256 x 64 Dots | － |
| 模組尺寸 | 84.0×25.8×2.15 | mm |
| 有效區域 | 69.098×17.258 | mm |
| 像素大小 | 0.248×0.248 | mm |
| 像素間距 | 0.27×0.27 | mm |
| 顯示模組 | 被動矩陣 | |
| 顯示顏色 | 單色 | |
| 驅動方式 | 1/64 Duty | |
| IC | SSD1322 (COF) | |
| 介面 | 6800, 8080, SPI | |
| 尺寸 | 2.8 吋 | |
最大絕對額定值
| 參數 | 符號 | 最小值 | 最大值 | 單位 |
|---|---|---|---|---|
| 邏輯電源電壓 | VDD | -0.5 | 2.75 | V |
| 低壓電源 | VCI | -0.3 | 4.0 | V |
| 輸入/輸出Pin供電電壓 | VDDIO | -0.5 | VCI | V |
| 顯示電源電壓 | VCC | -0.5 | 20.0 | V |
| 工作溫度 | TOP | -40 | +80 | °C |
| 儲存溫度 | TSTG | -40 | +85 | °C |
電氣特性
| 項目 | 符號 | 條件 | 最小值 | 典型值 | 最大值 | 單位 |
|---|---|---|---|---|---|---|
| 邏輯電源電壓 | VCI | Note | 2.8 | 3.0 | 3.3 | V |
| 顯示電源電壓 | VCC | － | 14 | 14.5 | 15 | V |
| 輸入高準位 | VIH | － | 0.8×VDDIO | － | VDDIO | V |
| 輸入低準位 | VIL | － | 0 | － | 0.2×VDDIO | V |
| 輸出高準位 | VOH | － | 0.9×VDDIO | － | VDDIO | V |
| 輸出低準位 | VOL | － | 0 | － | 0.1×VDDIO | V |
| 50% 設備運行電流 | VCC =14.5V | 25 | 30 | 32 | mA | |
Pin功能定義
| Pin Number | 符號 | I/O | 功能說明 | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Power Supply | |||||||||||||||||||
| 26 | VCI | P | 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. |
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| 25 | VDD | P | Power Supply for Core Logic Circuit This is a voltage supply pin. It can be supplied externally (within the range of 2.4~2.6V) or regulated internally from VCI. A capacitor should be connected between this pin & VSS under all circumstances. |
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| 24 | VDDIO | 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 VDDIO. When I/O signal pins (BS0~BS1, D0~D7, control signals…) pull high, they should be connected to VDDIO. |
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| 2 | VSS | 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. |
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| 3,29 | 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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| 5,28 | VLSS | P | Ground of Analog Circuit These are the analog ground pins. They should be connected to VSS externally. |
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| 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 10uA. |
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| 4 | VCOMH | 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. |
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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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| Testing Pads | |||||||||||||||||||
| 21 | FR | O | This pin is No Connection pins. Nothing should be connected to this pin. This pin should be left open individually. | ||||||||||||||||
| 16 | BS0 | I | Communicating Protocol Select These pins are MCU interface selection input. See the following table:
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| 17 | BS1 | ||||||||||||||||||
| 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. |
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| 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. |
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| 18 | D/C# | I | 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. |
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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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| 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. |
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| Reserve | |||||||||||||||||||
| 23 | N.C. | - | Reserved Pin The N.C. pin between function pins are reserved for compatible and flexible design. |
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| 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. |
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