Home Products OLED Module OLED Knob WEO128128D-CTP-Knob

Ø1.18" 128x128 OLED Touch Encoder

Model No. WEO128128D-CTP-Knob

►Type: Graphic
►Structure: COG
►Size: 1.18 inch
►128 x 128 Dot Matrix
►Built-in controller SSD1327
►3V Power supply
►1/128 duty
►Interface: SPI, I2C
►With Capacitive Touch Screen (CTP)
►Detect Point : 1 Finger
►Display Color: White / Yellow / Sky Blue (have high MOQ)
►Support Grayscale

DESCRIPTION

The round OLED WEO128128D-CTP+Knob model is an extension item which equipped with capacitive touch screen and a control knob on module, it's an Ø1.18" circular COG type OLED display; made of resolution 128x128 dots. This  OLED Touch Encoder module is built in with SSD1327 IC, it supports 4-line SPI and I2C interface, supply voltage for logic 3V (typical value), 1/128 driving duty. This WEO128128D-CTP+Knob model is built in with FT3268 touch panel IC on module, which supports I2C interface, one detect point for capacitive touch screen.

This round OLED extended from WEO128128D model featured with capacitive touch screen and Knob is ideal for applications which required a control knob on devices such as smart home applications, intelligent technology devices, audio system, etc. This module can be operating at temperatures from -20℃ to +50℃; its storage temperatures range from -30℃ to +70℃.

 

DRAWING

1.18 inch 128x128 OLED Knob with CTP Touch Panel - WEO128128D-CTP-Knob

Data source ref: WEO128128DWPP3D00E00

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.
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.
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.
6 BS1 MCU bus interface selection pins. Select appropriate logic setting as described in the following table. BS1 is pin select. Bus Interface selection
BS1 Interface
0 4-line SPI
1 I2C
Note  (1) 0 is connected to VSS  (2) 1 is connected to VCI
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).
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.
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.
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.
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

Encoder PIN Definition

No. Symbol Function
1 FSW_A Encoder terminal signal-A
2 FSW_B Encoder terminal signal-B
3 FSW_C Encoder terminal signal-C
4 FSW_D Ground

Mechanical Data

Item Dimension Unit
Dot Matrix 128 × 128 Dots
Module dimension Ø56 × 21.56 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 1/128 Duty
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 4.0 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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