1.18" 128x128 Round OLED Display Module with Touch Screen
Model No. WEO128128D-CTP
►Type: Graphic
►Structure: COG
►Size: 1.18 inch
►128 x 128 Dot Matrix
►IC：SSD1327
►3V Power supply
►1/128 duty
►Interface: SPI, I2C
►With Capacitive Touch Screen (CTP)
►Detect Point : 1 Finger
►Display Color: White / Yellow
►Support Grayscale
Description
WEO128128D-CTP, a Ø1.18”round graphic OLED display, comes with a capacitive touch screen integrated into the module, boasting a resolution of 128x128 dots. The module is equipped with the SSD1327 IC, supporting a 4-line SPI and I2C interface, with a typical logic supply voltage of 3V and a 1/128 driving duty. Additionally, the WEO128128D-CTP model includes the FT3268 touch panel IC integrated into the module, supporting the I2C interface and featuring a single detect point for the capacitive touch screen.
This round OLED WEO128128D with CTP model is well-suited for smart home applications, intelligent technology devices, energy systems, communication systems, medical instruments, and more. Sporting a high contrast ratio of 10,000:1 and an expansive viewing angle of up to 160°, this OLED module ensures clearer display images. The module is designed to operate within temperatures ranging from -20℃ to +70℃, with storage temperatures ranging from -30℃ to +70℃.
DRAWING
SPECIFICATIONS
Interface Pin Function
| No. | Symbol | Function | ||||||
|---|---|---|---|---|---|---|---|---|
| 1 | VSS | Ground pin. It must be connected to external ground. | ||||||
| 2 | VCC | Power supply for panel driving voltage. This is also the most positive power voltage supply pin. It is supplied by external high voltage source. | ||||||
| 3 | VCOMH | COM signal deselected voltage level. A capacitor should be connected between this pin and VSS. No external power supply is allowed to connect to this pin. |
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| 4 | VCI | Low voltage power supply and power supply for interface logic level. It should match with the MCU interface voltage level and must be connected to external source. VCI must always set to be equivalent to or higher than VDD. |
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| 5 | VDD | Power supply pin for core logic operation. VDD can be supplied externally (within the range of 2.4V to 2.6V) or regulated Internally from VCI. A capacitor should be connected between VDD and VSS under all circumstances. |
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| 6 | BS1 | MCU bus interface selection pins. Select appropriate logic setting as described in the following table. BS1 is pin select. Bus Interface selection
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| 7 | IREF | This pin is the segment output current reference pin | ||||||
| 8 | 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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| 9 | 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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| 10 | DC# | This pin is Data/Command control pin connecting to the MCU. When the pin is pulled HIGH, will be interpreted as data. When the pin is pulled LOW, will be transferred to a command register In I2C mode, this pin acts as SA0 for slave address selection. |
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| 11 | D0 | When serial interface mode is selected, D0 will be the serial clock input: SCLK; D1 will be the serial data input: SDIN and D2 should be kept NC. 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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| 12 | D1 | |||||||
| 13 | D2 | |||||||
| 14 | TP_SCK | I2C clock signal | ||||||
| 15 | TP_SDA | I2C data signal | ||||||
| 16 | TP_INT | Interrupt signal | ||||||
| 17 | VCC | Power supply for panel driving voltage. This is also the most positive power voltage supply pin. | ||||||
| 18 | VSS | Ground |
Mechanical Data
| Item | Dimension | Unit |
|---|---|---|
| Dot Matrix | 128 × 128 | Dots |
| Module dimension | Ø50.5 × 5.0 | mm |
| Active Area | Ø30.0 | mm |
| Pixel Size | 0.210 × 0.210 | mm |
| Pixel Pitch | 0.235 × 0.235 | mm |
| Display Mode | Passive Matrix | |
| Display Color | Monochrome | |
| Drive Duty | 1/128Duty | |
| Gray Scale | 4 bits | |
| IC | SSD1327 | |
| Interface | 4-line SPI , I2C | |
| Size | 1.18 inch | |
| CTP IC | FT3268 |
| Detect Point | 1 |
| CTP Interface | I2C |
Absolute Maximum Ratings
| Parameter | Symbol | Min | Max | Unit |
|---|---|---|---|---|
| Supply Voltage for Operation | VCI | -0.3 | 3.6 | V |
| Supply Voltage for Logic | VDD | -0.5 | 2.75 | V |
| Supply Voltage for Display | VCC | -0.5 | 19.0 | V |
| Operating Temperature | TOP | -20 | +70 | °C |
| Storage Temperature | TSTG | -30 | +70 | °C |
Electronical Characteristics
DC Electrical Characteristics
| Item | Symbol | Condition | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| Supply Voltage for Operation | VCI | － | 2.8 | 3.0 | 3.3 | V |
| Supply Voltage for Display | VCC | － | 8.0 | 14.5 | 15.0 | V |
| Supply Voltage for Logic | VDD | － | 1.65 | － | 2.6 | V |
| High Level Input | VIH | － | 0.8×VCI | － | VCI | V |
| Low Level Input | VIL | － | 0 | － | 0.2×VCI | V |
| High Level Output | VOH | Iout = 100uA | 0.9×VCI | － | VCI | V |
| Low Level Output | VOL | Iout = 100uA | 0 | － | 0.1×VCI | V |
| 50% Check Board operating Current | VCC =14.5V | － | 15 | 30 | mA | |
Touch Panel Controller FT3268
| Item | Symbol | Condition | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| Input High Volt. | VIH | － | 0.7×VDD | － | VDD | V |
| Input Low Volt. | VIL | － | -0.3 | － | 0.3×VDD | V |
| Output High Volt. | VOH | IOH = 0.1mA | 0.7×VDD | － | － | V |
| Output Low Volt. | VOL | IOL = 0.1mA | － | － | 0.3×VDD | V |
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