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产品叙述
WEO025664E 是一款采用 COG 结构的 3.55 英寸图形 OLED 显示屏，分辨率为 256x64，搭载 SSD1363 控制器 IC。模块外形尺寸为 99.2 × 33.5 × 2.01 mm，有效显示区域为 87.52 × 21.28 mm。该产品支持 4-bit（16 级）灰度显示，提供 6800/8080 8-bit 并行接口、4 线 SPI 接口和 I2C 接口。对于希望减少主控系统接口信号线数量的设计，I2C 提供了另一种连接方式。
与 WEO025664D 相比，两款产品的主要区别在于控制器和接口配置。WEO025664D 采用 SSD1322 控制器 IC，支持 6800/8080 并行接口及 SPI 接口，不支持 I2C；WEO025664E 则采用 SSD1363 控制器 IC，并增加了 I2C 接口选项。两款产品具有相同的 256x64 分辨率、模块外形尺寸及有效显示区域，工程师可根据主控系统的接口需求选择合适的型号。
WEO025664E 采用 1/64 Duty 驱动方式，显示驱动电压（VCC）的典型值为 16V。在 VCC = 16V、50% 棋盘格显示图案（Checkerboard Pattern）的测试条件下，典型电流消耗为 30mA。设计电源及显示接口电路时，应考虑上述电气参数。
WEO025664E 可用于医疗设备、工业控制面板、自助结账设备、专业音频设备、Hi-Fi 音响系统及音频接口面板等需要紧凑型图形 OLED 显示屏和灰度显示功能的应用。此外，该模块也可用于评估 2U 服务器前面板本地监控界面的设计方案，选型时需结合前面板可用空间及实际显示内容。模块的工作温度范围为 -40°C 至 +80°C，存储温度范围为 -40°C 至 +85°C。
有关 OLED 显示屏在 2U 服务器前面板中的应用及设计要点，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 | 规格 | 单位 |
|---|---|---|
| 点阵 | 256 x 64 Dots | - |
| 模块尺寸 | 99.2 × 33.5 × 2.01 | mm |
| 有效区域 | 87.52 × 21.28 | mm |
| 像素大小 | 0.312 × 0.303 | mm |
| 像素间距 | 0.342 × 0.333 | mm |
| 显示模式 | 被动矩阵 | |
| 显示颜色 | 单色 | |
| 驱动方式 | 1/64 Duty | |
| 灰阶 | 4 bits | |
| IC | SSD1363 | |
| 接口 | 6800,8080,4-Wire SPI,I2C | |
| 尺寸 | 3.55吋 | |
最大绝对额定值
| 参数 | 符号 | 最小值 | 最大值 | 单位 |
|---|---|---|---|---|
| 供电电压 | VDD | -0.3 | 4.0 | V |
| 供电电压 | VCC | -0.5 | 19.0 | V |
| 工作温度 | TOP | -40 | 80 | °C |
| 储存温度 | TSTG | -40 | 85 | °C |
电气特性
DC 电气特性
| 项目 | 符号 | 条件 | 最小值 | 典型值 | 最大值 | 单位 |
|---|---|---|---|---|---|---|
| 低压电源，输入 / 输出 Pin 电源 | VDD | － | 1.65 | 3.0 | 3.3 | V |
| 工作电压 | VCC | － | 8.0 | 16.0 | 16.5 | V |
| 输入高电压 | VIH | － | 0.8×VDD | － | VDD | V |
| 输入低电压 | VIL | － | 0 | － | 0.2×VDD | V |
| 输出高电压 | VOH | － | 0.9×VDD | － | VDD | V |
| 输出低电压 | VOL | － | 0 | － | 0.1×VDD | V |
| 显示屏 50% 像素开启 | ICC | VCC =16V | － | 30 | 45 | mA |
Pin功能定义
| Pin Number | 符号 | 功能说明 | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | ESD_GND | ESD Ground pin | |||||||||||||||
| 2 | VSS | Ground pin. It must be connected to external ground. | |||||||||||||||
| 3 | VCC | Power supply for panel driving voltage. This is also the most positive power voltage supply pin. A capacitor should be connected between this pin and VSS. |
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| 4 | VCOMH | COM signal deselected voltage level. A capacitor should be connected between this pin and VSS. |
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| 5 | VLSS | Analog system ground pin. It must be connected to external ground. | |||||||||||||||
| 6 | D7 | These pins are bi-directional data bus connecting to the MCU data bus. Unused pins are recommended to tie LOW. When serial interface mode is selected, D2, D1 should be tied together as the serial data input: SDIN, and D0 will be the serial clock input: SCLK. When I2C mode is selected, D2, D1 should be tied together and serve as SDAout, SDAin in application and D0 is the serial clock input, SCL. |
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| 7 | D6 | ||||||||||||||||
| 8 | D5 | ||||||||||||||||
| 9 | D4 | ||||||||||||||||
| 10 | D3 | ||||||||||||||||
| 11 | D2 | ||||||||||||||||
| 12 | D1 | ||||||||||||||||
| 13 | D0 | ||||||||||||||||
| 14 | E(RD#) | This pin is MCU interface input. When 6800 interface mode is selected, this pin will be used as the Enable (E) signal. Read/write operation is initiated when this pin is pulled HIGH and the chip is selected. When 8080 interface mode is selected, this pin receives the Read (RD#) signal. Read operation is initiated when this pin is pulled LOW and the chip is selected. When serial or I2C interface is selected, this pin must be connected to VSS. |
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| 15 | R/W# (WR#) | This pin is read / write control input pin connecting to the MCU interface. When 6800 interface mode is selected, this pin will be used as Read/Write (R/W#) selection input. Read mode will be carried out when this pin is pulled HIGH and write mode when LOW. When 8080 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 chip is selected. When serial or I2C interface is selected, this pin must be connected to VSS. |
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| 16 | BS1 | MCU bus interface selection pins. Select appropriate logic setting as described in the following table. BS2 and BS1 are pin select.
(1) 0 is connected to VSS (2) 1 is connected to VDD |
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| 17 | BS2 | ||||||||||||||||
18 |
D/C# | This pin is Data/Command control pin connecting to the MCU. When the pin is pulled HIGH, the data at D[7:0] will be interpreted as data. When the pin is pulled LOW, the data at D[7:0] will be transferred to a command register. In I2C mode, this pin acts as SA0 for slave address selection. |
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| 19 | CS# | This pin is the chip select input connecting to the MCU. The chip is enabled for MCU communication only when CS# is pulled LOW (active LOW). |
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| 20 | RES# | 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 | This pin outputs RAM write synchronization signal. Proper timing between MCU data writing and frame display timing can be achieved to prevent tearing effect. It should be kept NC if it is not used. |
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| 22 | IREF | This pin is the segment output current reference pin. IREF is supplied externally. A resistor should be connected between this pin and VSS to maintain the current around 10uA. It should be kept floating when internal IREF is chosen by command setting. |
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| 23~24 | NC | This is dummy pin. It should be kept NC. | |||||||||||||||
| 25 | VP | This pin is the segment pre-charge voltage reference pin. A capacitor can be connected between this pin and VSS to improve visual performance. It can also be float per application. No external power supply is allowed to connect to this pin. |
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| 26 | VDD | Power supply pin for core logic operation. A capacitor should be connected between this pin and VSS. | |||||||||||||||
| 27 | VSL | This is segment voltage (output low level) reference pin. This pin has to be connected with resistor and diode to ground (details depends on application). |
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| 28 | VLSS | Analog system ground pin. It must be connected to external ground. | |||||||||||||||
| 29 | VCC | Power supply for panel driving voltage. This is also the most positive power voltage supply pin. A capacitor should be connected between this pin and VSS. |
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| 30 | ESD_GND | ESD Ground pin |