Model No. WEO012832S
►Type: Graphic
►Structure: COG
►Size: 0.91"
►128x32 OLED Display
►IC：CH1120
►3V Power supply
►1/32 duty
►Interface: SPI, I2C
►Display Color: White / Yellow
►Support Grayscale
The WEO012832S is a 0.91-inch OLED display module with a 128x32 dot matrix and integrated CH1120 driver IC. Designed for compact systems, this OLED 0.91-inch display is optimized for applications where mechanical depth, power efficiency, and clear monochrome rendering are key constraints. It supports 4-bit grayscale, offering more flexibility for UI expression compared to traditional 1-bit OLED modules. For detailed specifications, please refer to the OLED 0.91" datasheet.
The OLED display 0.91 128x32 operates at 3V logic power and offers SPI and I2C interfaces for seamless integration with most MCU platforms. The module features a wide viewing angle of 160° (H/V) and an extensive operating temperature range from –40°C to +80°C, ensuring stable performance in both consumer and industrial environments.
With its compact OLED 0.91-inch dimensions and energy-efficient design, the WEO012832S is ideal for:
If your project requires added mechanical support, simplified mounting, or easier prototyping, the same OLED 0.91-inch display is also available in a COG+PCB version.
Please refer to the WEA012832S for the PCB-integrated configuration.
Data source ref:WEO012832SWPP3N00000
| Item | Dimension | Unit |
|---|---|---|
| Dot Matrix | 128 × 32 Dots | － |
| Module dimension | 30.0 × 11.5 × 1.41 | mm |
| Active Area | 22.38 × 5.58 | mm |
| Pixel Size | 0.155 × 0.155 | mm |
| Pixel Pitch | 0.175 × 0.175 | mm |
| Display Mode | Passive Matrix | |
| Display Color | Monochrome | |
| Drive Duty | 1/32 Duty | |
| Gray Scale | 4 bits | |
| IC | CH1120 | |
| Interface | 4-wire SPI,I2C | |
| Size | 0.91 inch | |
| Parameter | Symbol | Min | Max | Unit |
|---|---|---|---|---|
| Supply Voltage for Logic | VDD | -0.3 | 3.5 | V |
| Supply Voltage for Display | VPP | -0.3 | 15.0 | V |
| Operating Temperature | TOP | -40 | +80 | °C |
| Storage Temperature | TSTG | -40 | +85 | °C |
| Item | Symbol | Condition | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| Supply Voltage for Logic | VDD | － | 1.65 | 3.0 | 3.5 | V |
| Supply Voltage for Display | VPP | － | 8.0 | 9.0 | 9.5 | V |
| Input High Volt. | VIH | － | 0.8×VDD | － | VDD | V |
| Input Low Volt. | VIL | － | VSS | － | 0.2×VDD | V |
| Output High Volt. | VOH | － | 0.8×VDD | － | VDD | V |
| Output Low Volt. | VOL | － | VSS | － | 0.2×VDD | V |
| Display 50% Pixel on | IPP | VPP=9V | － | 3 | 6 | mA |
| No. | Symbol | Function | ||||||
|---|---|---|---|---|---|---|---|---|
| 1 | ESD_GND | This pin should be connected to GND. | ||||||
| 2 | VPP | OLED panel power supply. Connect to capacitor. It could be supplied externally. This is the most positive voltage supply. |
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| 3 | VCOMH | This is a pin for the voltage output high level for common signals. A capacitor should be connected between this pin and VSS. |
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| 4 | SEGH | This is a segment pre-charge voltage. A capacitor can be connected between this pin and GND if necessary. When external capacitor is not used, this pin should be kept NC. |
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| 5 | VSL | Discharge voltage level pad. This pad should be connected to resistor and diode externally. |
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| 6 | VSS | Ground for logic and analog. This pin should be connected to GND externally. | ||||||
| 7 | VDD | Power supply for logic. | ||||||
| 8 | RES | This is a reset signal input pin. When RES is set to “L”, the settings are initialized. The reset operation is performed by the RES signal level. This pin internal pull high. |
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| 9 | A0/SA0 | This is the Data/Command control pin that determines whether the data bits are data or a command. In I2C interface, this pad serves as SA0 to distinguish the different address of OLED driver. |
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| 10 | CS | This pin is the chip select input. When CS = “L”, then the chip select becomes active, and data/command I/O is enabled. | ||||||
| 11 | SCL | The serial clock input. | ||||||
| 12 | SI | The serial data input. | ||||||
| 13 | IM1 | MCU bus interface selection pins.
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| 14 | IREF | This is a segment current reference pin. A resistor should be connected between this pin and GND. |
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| 15 | DVDD | This pin is for regulator circuit. A capacitor should be connected between this pin and GND if necessary. When external capacitor Is not used, this pin should be kept NC |
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| 16 | ESD_GND | This pin should be connected to GND. |
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