1.5 Graphic COG Graphic OLED Display 128x128, OLED 128x128, 128x128 pixel OLED Module

1.5" COG Graphic OLED Display, 128x128 pixel OLED Module

Model No. WEO128128A

►Type: Graphic
►Structure: COG
►Size: 1.5 inch
►OLED 128x128
►Built-in controller SSD1327
►3V Power supply
►1/128 duty
►Interface: 6800, 8080, SPI, I2C
►Display Color: White / Yellow / Sky Blue
►Support Grayscale
►Other FPC options available in below table

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DESCRIPTION

Winstar WEO128128A is a passive matrix OLED display which is made of 128x128 pixels, diagonal size 1.5 inch. The WEO128128A has the outline dimension of 33.8 x 36.5 mm and AA size 26.86 x 26.83 mm; it is built in with SSD1327 controller IC and it communicates via 6800/8080 8-bit parallel, I2C and 4-wire SPI serial interface, 3V power supply. The WEO128128A is a COG structure OLED display which is ultra thin and no need of backlight (self emitting); it's lightweight and low power consumption. This OLED module is suitable for handheld instruments, meters, IoT, etc.

WEO128128A module can be operating at temperatures from -40℃ to +80℃; its storage temperatures range from -40℃ to +80℃. Below is the basic specification of WEO128128A as reference.

DRAWING

Winstar 1.5" COG Graphic OLED Display 128x128, 128x128 pixel OLED Module - WEO128128A

SPECIFICATIONS

Interface Pin Function

No.

Symbol

Function

VSS

Ground pin. It must be connected to external ground.

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.

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.

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.

VDD

Power supply pin for core logic operation.

BS1

MCU bus interface selection pins. Select appropriate logic setting as described in the following table. BS2 and BS1 are pin select.
Bus Interface selection

BS[2:1]	Interface
0	4 line SPI
1	I2C
11	8-bit 8080 parallel
10	8-bit 6800 parallel

Note
(1) 0 is connected to VSS
(2) 1 is connected to VCI

BS2

VSS

Ground pin. It must be connected to external ground.

IREF

This pin is the segment output current reference pin

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).

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.

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.
When 3-wire serial interface is selected, this pin must be connected to VSS.

W/R#

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.

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.

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, 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.

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.

VSS

Ground pin.

General Specification

Item	Dimension	Unit
Dot Matrix	128 x 128 Dots	－
Module dimension	33.80 x 36.50 x 2.05	mm
Active Area	26.86 x 26.86	mm
Pixel Size	0.185 x 0.185	mm
Pixel Pitch	0.210 x 0.210	mm
Display Mode	Passive Matrix
Display Color	Monochrome
Drive Duty	1/128Duty
IC	SSD1327
Interface	6800,8080,SPI,I2C
Size	1.5 inch

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	-40	+80	°C
Storage Temperature	TSTG	-40	+85	°C

Electronical Characteristics

Item	Symbol	Condition	Min	Typ	Max	Unit
Supply Voltage for Logic	VCI	Note	2.8	3.0	3.3	V
Supply Voltage for Display	VCC	－	14	14.5	15	V
High Level Input	VIH	－	0.8×VCI	－	VCI	V
Low Level Input	VIL	－	0	－	0.2×VCI	V
High Level Output	VOH	－	0.9×VCI	－	VCI	V
Low Level Output	VOL	－	0	－	0.1×VCI	V
50% Check Board operating Current		VCC =14.5V	－	24	30	mA