Modellnummer WEX025664A
►Typ: Grafik
►Bauweise: COF
►Größe: 2,8" OLED
►OLED 256x64 Punktmatrix
►IC：SSD1322
►3-V-Stromversorgung
►1/64 duty
►Schnittstelle: 6800, 8080, SPI
►die Farbe des Displays: Weiß / Gelb
►Unterstützt Grauskala
WEX025664A ist ein grafisches 2,8-Zoll-OLED-Displaymodul mit 256x64 Pixeln und Chip-on-Film-Aufbau (COF). Die Modulabmessungen betragen 84,0 × 25,8 × 2,15 mm, die aktive Anzeigefläche misst 69,098 × 17,258 mm. Das längliche Displayformat eignet sich für Geräte, bei denen Texte, Grafiken und Statusinformationen auf einer begrenzten Anzeigefläche dargestellt werden müssen.
Das 256x64-OLED-Display ist mit dem SSD1322-Controller ausgestattet und unterstützt 8-Bit-6800/8080-Parallelschnittstellen sowie 3-Draht- und 4-Draht-SPI zur Anbindung an unterschiedliche Hostsysteme. Es unterstützt außerdem die Graustufendarstellung, sodass grafische Elemente mit unterschiedlichen Helligkeitsstufen angezeigt werden können. Das Modul arbeitet mit einem Multiplexverhältnis von 1:64 und ist mit weißer oder gelber Anzeigefarbe erhältlich.
Die Niederspannungsversorgung (VCI) des WEX025664A liegt zwischen 2,8 und 3,3 V (typisch 3,0 V), die Display-Betriebsspannung (VCC) zwischen 14 und 15 V (typisch 14,5 V). Diese Spannungsanforderungen sind bei der Auslegung der Stromversorgung und der Schnittstellenschaltung zu berücksichtigen.
WEX025664A eignet sich für Industrieanlagen, Embedded-Systeme, tragbare Messgeräte und lokale Überwachungsschnittstellen, bei denen Texte, grafische Anzeigen und Gerätestatusinformationen auf begrenztem Raum dargestellt werden sollen. Ähnliche Anforderungen bestehen bei Server-Frontpanel-Displays, bei denen sowohl der verfügbare Einbauraum als auch die darzustellenden Informationen wichtige Auslegungskriterien sind.
Weitere Informationen zur Integration von OLED-Displays in die Frontpanels von 2U-Servern finden Sie im Fachartikel PMOLED-Displays für die lokale Überwachung von 2U-Servern: Anwendungen und Designaspekte.
| Merkmal | Abmessung | Einheit |
|---|---|---|
| Punktmatrix | 256 x 64 Dots | － |
| Modulabmessungen | 84.0×25.8×2.15 | mm |
| Aktive Fläche | 69.098×17.258 | mm |
| Pixelgröße | 0.248×0.248 | mm |
| Pixelabstand | 0.27×0.27 | mm |
| Anzeigemodus | Passive Matrix | |
| Anzeigefarbe | Monochrom | |
| Tastverhältnis | 1/64 Duty | |
| IC | SSD1322 (COF) | |
| Schnittstelle | 6800, 8080, SPI | |
| Größe | 2.8 inch | |
| Parameter | Symbol | Min | Max | Einheit |
|---|---|---|---|---|
| Logikversorgungsspannung | VDD | -0.5 | 2.75 | V |
| Niederspannungsversorgung | VCI | -0.3 | 4.0 | V |
| Versorgungsspannung für I/O-Pins | VDDIO | -0.5 | VCI | V |
| Versorgungsspannung Display | VCC | -0.5 | 20.0 | V |
| Betriebstemperatur | TOP | -40 | +80 | °C |
| Lagertemperatur | TSTG | -40 | +85 | °C |
| Parameter | Symbol | Bedingung | Min | Typ | Max | Einheit |
|---|---|---|---|---|---|---|
| Logikversorgungsspannung | VCI | Note | 2.8 | 3.0 | 3.3 | V |
| Versorgungsspannung Display | VCC | － | 14 | 14.5 | 15 | V |
| Hochpegel-Eingang | VIH | － | 0.8×VDDIO | － | VDDIO | V |
| Niedrigpegel-Eingang | VIL | － | 0 | － | 0.2×VDDIO | V |
| Hochpegel-Ausgang | VOH | － | 0.9×VDDIO | － | VDDIO | V |
| Niedrigpegel-Ausgang | VOL | － | 0 | － | 0.1×VDDIO | V |
| Betriebsstrom der Platine bei 50% | VCC =14.5V | 25 | 30 | 32 | mA | |
| Pin Number | Symbol | I/O | Funktion | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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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