Circular LCD Screen, Circular LCD Display Module 128×128

Model No. WO128128A

COG LCD Display
Graphic LCD
128×128 dots
IC: ST75161
+3.3V power supply
1/136 duty cycle
Interface : 6800/8080/SPI/I2C

Category: COG LCD

Description

The WO128128A is a COG monochrome graphic circular LCD display module with a 128×128 dot matrix format. This Circular LCD screen display module is equipped with the ST75161 IC and supports 8080/6800 parallel, 3-wire and 4-wire serial SPI, and I2C interfaces. The viewing direction is set at 6 o’clock, with a 1/136 driving duty and 1/12 BIAS.

The logic supply voltage for the WO128128A is in the range of 2.7V to 3.3V, with a typical value of 3V. This circular LCD screen module can operate within temperatures ranging from -20℃ to +70℃, and its storage temperatures range from -30℃ to +80℃.

The WO128128A is available in two variants: FSTN Negative (WO128128A-TDI) and FSTN positive LCD type with white LED backlight (WO128128A-TFH). USB demo kits are currently available, and interested parties are encouraged to contact us for USB sampling or a quotation.

Demo kit P/N: WWSTNUSBDEMO-00 for WO128128A-TFH LCD module
Demo kit P/N: WWSTNUSBDEMO-01 for WO128128A-TDI LCD module

WO128128A Circular LCD Screen, Circular LCD Display Demo Kits - Winstar

Drawing

Data source ref: WO128128A-TFH#

Specifications

Interface Pin Function

Pin No.	SYMBOL	Function
1	VG	VG is the power of SEG-drivers.
2	V0	Positive operating voltage of COM-drivers.
3	XV0	Negative operating voltage of COM-drivers.
4	CA1P	DC/DC voltage converter
5	CA1N	DC/DC voltage converter
6	VDD	Power supply
7	VSS	Ground
8	COMSCN	Set scan direction of COM.
9	IF2	These pins select interface operation mode.
10	IF1
11	IF0
12	CSB	Chip select input pin.
13	A0	It determines whether the access is related to data or command.
14	ERD	Read / Write execution control pin.
15	RWR	Read / Write execution control pin.
16	RSTB	Hardware reset input pin
17-24	D0-D7	When using 8-bit parallel interface: 8080 or 6800 mode:8 bit bi-directional data bus When using serial interface : 4-line SPI or 3-line SPI mode D[7:4] : fix to “H” by VDD1. D[3:1] : serial input/output data (SDA). D[0] : serial input clock (SCL). D1 to D3 must be connected together (SDA) When using serial interface : I2C interface D[7] : SA[1], I2C slave address bit. Must be connected to VDD1 or VSS1. D[6] : SA[0], I2C slave address bit. Must be connected to VDD1 or VSS1. D[5:4] : fix to “H” by VDD1. D[3:2] : SDA_OUT, serial data and acknowledge output for the I2C interface. D[1] : SDA_IN, serial input data D[0] : SCL, serial input clock . D1 to D3 must be connected together (SDA) CSB must be fixed to “L” by VSS1.
25	A	Anode input for LED backlight.
26	K	Cathode input for LED backlight

Mechanical Data

Item	Dimension	Unit
Number of dots	128 x 128	－
Module dimension	55.0 x 57.0 x 6.18	mm
View area	42.0 x 42.0	mm
Active area	44.0 x 44.0	mm
Dot size	0.308 x 0.308	mm
Dot pitch	0.328 x 0.328	mm
Duty	1/136 DUTY,1/12 BIAS
Backlight Type	LED
IC	ST75161
Interface	68/80/4-Line SPI/I2C/9-bit 3-line serial interface

Absolute Maximum Ratings

Item	Symbol	Min	Typ	Max	Unit
Operating Temperature	TOP	-20	－	+70	℃
Storage Temperature	TST	-30	－	+80	℃
Power Supply Voltage	VDD	-0.3	－	4.0	V
LCD Power supply voltage	VLCD	-0.3	－	20	V
LCD Power supply voltage	V0-XV0	-0.3	－	19	V
Input voltage	VIN	-0.3		VDD+0.3	V

Electrical Characteristics

Item	Symbol	Condition	Min.	Typ.	Max.	Unit
Supply Voltage For Logic	VDD-VSS	－	2.7	3.0	3.3	V
Supply Voltage For LCD	VOP	Ta=-20℃ Ta=25℃ Ta=70℃	－ 13.7 －	－ 14.0 －	－ 14.3 －	V V V
Input High Volt.	VIH	－	0.7 VDD	－	VDD	V
Input Low Volt.	VIL	－	Vss	－	0.3 VDD	V
Output High Volt.	VOH	－	0.8 VDD	－	VDD	V
Output Low Volt.	VOL	－	Vss	－	0.2 VDD	V
Supply Current	IDD	VDD=3.0V	－	－	2.0	mA

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