Round OLED Display Module, OLED Round Touch Screen

Item	Dimension	Unit
Structure	COG
Size (Diagonal)	1.18	inch
Dot Matrix / Resolution	128 × 128	dots
Module Dimension	Ø50.5 × 5.0	mm
Viewing Area	Ø31.0	mm
Active Area	Ø30.0	mm
Dot / Pixel Size	0.210 × 0.210	mm
Dot / Pixel Pitch	0.235 × 0.235	mm
Emitting Color	OLED, Yellow / White
Support Grayscale	Yes
Display Mode	Passive Matrix
Gray Scale	4 bits
IC	SSD1327
Interface	4-line SPI / I2C
PCAP IC	FT3268
PCAP Interface	I2C
Detect Points	1	Points
Touch Panel	Capacitive Touch Panel
Power Supply	3V
Duty	1/128 duty
Operating Temperature	-20~+70	°C
Storage Temperature	-30~+70	°C
Polarizer Type	Polarizer optional
Type	OLED Graphic Display, OLED Touch Display

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.
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.

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

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.

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.

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.

TP_SCK

I2C clock signal

TP_SDA

I2C data signal

TP_INT

Interrupt signal

VCC

Power supply for panel driving voltage. This is also the most positive power voltage supply pin.

VSS

Ground

1.18 Inch Round OLED Display Module, OLED Round Touch Screen 128x128 - REX128128D-CTP

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

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