1.12 inch OLED, 128×128 SPI OLED Display

Model No. WEO128128G

Type: Graphic
Structure: COG
Size: 1.12″
128 x 128 Dot Matrix
IC：SH1107
3V Power supply
1/128 duty
Interface: 6800,8080,4-wire SPI,I2C
Display Color: White / Yellow

Categories: Graphic OLED Display, OLED Module

Description

WEO128128G is a 1.12 inch Graphic OLED display featuring COG structure with HotBar FPC; made of resolution 128×128 pixels. This module is built-in with SH1107 IC; it supports 6800/8080 8-bit parallel, 4-Wire SPI, I2C interface, the supply voltage for Logic 3V (typical value), and the supply voltage for display is 12V. The current with 50% checkerboard display is 15mA @ VCC 12V (for white color), 1/128 driving duty.

WEO128128G is a COG structure OLED display module that is lightweight, low power, and very thin. It is suitable for meter devices, home applications, POS systems, Cloud/IoT systems, handheld instruments, intelligent technology devices, energy systems, automotive, communication systems, medical instruments, etc. WEO128128G OLED module can be operating at temperatures from -40℃ to +80℃; its storage temperatures range from -40℃ to +85℃.

Drawing

1.12 inch OLED, 128x128 SPI OLED Display - WEO128128G
Data source ref:WEO128128GWAP3N00000

SPECIFICATIONS

Interface Pin Function

No.

Symbol

Function

VPP

This is the most positive voltage supply pad of the chip.
It should be supplied externally.

VCOMH

This is a pad for the voltage output high level for common signals.
A capacitor should be connected between this pad and VSS.

VDD

Power supply for logic and input.

Not connected.

IM1

These are the MPU interface mode select pads.

	8080	I2C	6800	4SPI
IM1	1	1	0	0
IM2	1	0	1	0

IM2

IREF

This is a segment current reference pad. A resistor should be connected between this pad and VSS. Set the current at 15.625uA.

This pad is the chip select input. When CS = “L”, then the chip select becomes active, and data/command I/O is enabled.

RES

This is a reset signal input pad. When RES is set to “L”, the settings are initialized. The reset operation is performed by the RES signal level.

This is the Data/Command control pad that determines whether the data bits are data or a command.
A0 = “H”: the inputs at D0 to D7 are treated as display data.
A0 = “L”: the inputs at D0 to D7 are transferred to the command registers.
In I2C interface, this pad serves as SA0 to distinguish the different address of OLED driver.

This is a MPU interface input pad.
When connected to an 8080 MPU, this is active LOW. This pad connects to the 8080 MPU WR signal. The signals on the data bus are latched at the rising edge of the WR signal. When connected to a 6800 Series MPU: This is the read/write control signal input terminal.
When WR = “H”: Read. When WR = “L”: Write.

E/RD

This is a MPU interface input pad.
When connected to an 8080 series MPU, it is active LOW. This pad is connected to the RD signal of the 8080 series MPU, and the data bus is in an output status when this signal is “L”.
When connected to a 6800 series MPU, this is active HIGH. This is used as an enable clock input of the 6800 series MPU.

13~20

D0~D7

This is an 8-bit bi-directional data bus that connects to an 8-bit or 16-bit standard MPU data bus.
When the serial interface is selected, then D0 serves as the serial clock input pad (SCL) and D1serves as the serial data input pad (SI). At this time, D2 to D7 are set to high impedance.
When the I2C interface is selected, then D0 serves as the serial clock input pad (SCL) and D1 serves as the serial data input pad (SDA). At this time, D2 to D7 are set to high impedance.

GND

Ground

Not connected.

Mechanical Data

Item	Dimension	Unit
Dot Matrix	128 × 128	dots
Module dimension	25.9 x 30.1 x 1.26	mm
Active Area	20.076 x 20.076	mm
Pixel Size	0.137 x 0.137	mm
Pixel Pitch	0.157 x 0.157	mm
Display Mode	Passive Matrix
Display Color	Monochrome
Drive Duty	1/128 Duty
IC	SH1107
Interface	6800,8080,4-wire SPI,I2C
Size	1.12 inch

Absolute Maximum Ratings

Parameter	Symbol	Min	Max	Unit
Supply Voltage for Logic	VDD	-0.3	3.6	V
Supply Voltage for Display	VPP	-0.3	17.0	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	VDD	－	1.65	3.0	3.3	V
Supply Voltage for Display	VPP	－	7.0	12.0	12.5	V
Input High Volt.	VIH	－	0.8×VDD	－	VDD	V
Input Low Volt.	VIL	－	0	－	0.2×VDD	V
Output High Volt.	VOH	－	0.8×VDD	－	VDD	V
Output Low Volt.	VOL	－	0	－	0.2×VDD	V
50% Check Board operating Current	IPP	VPP=12V	－	15.0	25.0	mA

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