3.55″ OLED with Capacitive Touchscreen

Model No. WEO025664D-CTP

  • Graphic OLED Display
  • 3.55″ OLED
  • Structure: COG
  • 256×64 Dot Matrix
  • IC：SSD1322
  • 3V power supply
  • 1/64 duty cycle
  • Interface: 6800, 8080, SPI
  • Capacitive Touchscreen (OLED Capacitive Touchscreen)
  • Detect Point : 1 Finger
  • Display Color: White / Yellow
  • Support Grayscale
Categories: ,

Description

WEO025664D-CTP is a COG graphic 3.55-inch OLED display featuring a capacitive touchscreen on the module, with a resolution of 256×64 dots. The module is equipped with the SSD1322 IC, supporting 6800/8080 8-bit and 3-wire/4-wire SPI interfaces. The display supports 4-bit grayscale, with a low voltage power supply of 3.3V and a supply voltage for the display of 16V, utilizing a 1/64 duty cycle. This WEO025664D-CTP model also incorporates the FT6336U capacitive touchscreen IC on the module, which supports an I2C interface and includes one Detect Point for CTP.

This OLED module boasts a high contrast ratio of 10,000:1, allowing for more vibrant and deeper blacks, as well as brighter whites. This results in enhanced image quality, sharper details, and improved readability.

This 3.55″ Capacitive OLED WEO025664D-CTP model is ideal for smart home applications, intelligent technology devices, energy systems, meter devices, communication systems, medical instruments, and more. The module can operate at temperatures ranging from -20℃ to 70℃, with storage temperatures spanning from -30℃ to 80℃.

 

Drawing

Drawing

3.55 inch OLED Display, Capacitive OLED, OLED Capacitive Touchscreen - WEO025664D-CTP

Data source ref: WEO025664DWPP3D00000

SPECIFICATIONS

SPECIFICATIONS

Interface Pin Function

Pin Number Symbol I/O Function
1 ESD_GND P Ground
2 VSS P Ground.
3 VCC P Power supply for panel driving voltage.
This is also the most positive power voltage supply pin.
4 VCOMH P COM signal deselected voltage level.
A capacitor should be connected between this pin and VSS.
5 VLSS P Analog system ground pin.
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.
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.
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.
16 BS0 I Communicating Protocol Select
These pins are MCU interface selection input. See the following table:

BS[2:0] Interface
00 4 line SPI
01 3 line SPI
10 8-bit 8080 parallel
11 8-bit 6800 parallel

Note
(1) 0 is connected to VSS
(2) 1 is connected to VDDIO
17 BS1

18		 D/C# I Data/Command Control
This pin is Data/Command control pin connecting to the MCU.
When the pin is pulled HIGH, the content at D[7:0] will be interpreted as data.
When the pin is pulled LOW, the content at D[7:0] will be interpreted as command.
19 CS# I Data/Command Control
This pin is the chip select input connecting to the MCU. The chip is enabled for MCU communication only when CS# is pulled LOW.
20 RES# I 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.
21 FR O This pin is No Connection pins. Nothing should be connected to this pin. This pin should be left open individually.
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.
23 N.C. – Reserved Pin
The N.C. pin between function pins are reserved for compatible and flexible design.
24 VDDIO P Power Supply for I/O Pin
It should be matched with the MCU interface voltage level.
25 VDD P Power Supply for Core Logic Circuit
Power supply pin for core logic operation. A capacitor is required to connect between this pin and VSS
26 VCI P Power Supply for Operation
VCI must always be equal to or higher than VDD and VDDIO.
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.
28 VLSS P Ground of Analog Circuit
These are the analog ground pins. They should be connected to VSS externally.
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.
30 ESD GND P Ground

CTP Pin Function

1 GND Ground
2 VDD Power Supply Voltage of CTP
3 INT External interrupt to the host
4 SDA I2C data input and output
5 SCL I2C clock input
6 RST External Reset, Low is active
7-10 GND Ground.

General Specification

General Specification

Item Dimension Unit
Dot Matrix 256 × 64 Dots －
Module dimension 100.4 × 36.1 × 3.34 mm
Active Area 87.52 × 21.28 mm
Pixel Size 0.312 × 0.303 mm
Pixel Pitch 0.342 × 0.333 mm
Display Mode Passive Matrix
Display Color Monochrome
Drive Duty 1/64 Duty
Gray Scale 4 bits
OLED IC SSD1322
OLED Interface 6800, 8080, SPI
Size 3.55 inch
CTP IC FT6336U
Detect Point 1
CTP Interface I2C
Surface Normal Glare

Absolute Maximum Ratings

Absolute Maximum Ratings

Absolute Maximum Ratings

Parameter Symbol Min Max Unit
Supply Voltage for Operation VCI -0.3 4 V
Supply Voltage for Logic VDD -0.5 2.75 V
Supply Voltage for I/O Pins VDDIO -0.5 VCI V
Supply Voltage for Display VCC -0.5 20 V
Operating Temperature TOP -20 +70 °C
Storage Temperature TSTG -30 +80 °C

 

Touch Panel Controller FT6336U

Parameter Symbol Min Max Unit
Power Supply Voltage VDD -0.3 3.6 V

Electronical Characteristics

Electronical Characteristics

DC Electrical Characteristics

Item Symbol Condition Min Typ Max Unit
Low Voltage power supply VCI － 3.1 3.3 3.5 V
Supply Voltage for Display VCC － 15.5 16.0 16.5 V
Logic supply voltage VDD － 2.4 － 2.6 V
Power for I/O pins VDDIO － 1.65 VCI V
High Level Input VIH － 0.8×VDDIO － VDDIO V
Low Level Input VIL － 0 － 0.2×VDDIO V
High Level Output VOH － 0.9×VDDIO － VDDIO V
Low Level Output VOL － 0 － 0.1×VDDIO V
50% Check Board operating Current VCC =16V － 35 55 mA

Touch Panel Controller FT6336U

Item Symbol Condition Min Typ Max Unit
Supply Voltage VDD 2.8 3.0 3.3 V
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 IOH = 0.1mA － － 0.3×VDD V

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