128x64 Monochrome COG Display Module - RX12864L

128x64 Monochrome COG Display Module

Model No. RX12864L

RX12864L is a COG graphic LCD display module with resolution 128x64. This module supports both SPI and I2C interfaces. RX12864L shares the same dimension size, AA and VA with RX12864A1. The differences between these two series are the interface and controller IC. Users can switch I2C and SPI interfaces by using PIN 2 (SI2). In comparison to RX12864A1, the peripheral circuits of RX12864L have been simplified/optimized plenty.

The voltage doubler of RX12864L and BIAS circuit can work by using only 2 capacitors, while the RX12864A1 quadruple voltage requires 9 capacitors. Also, because RX12864L has a serial transmission design, there are only 13 interface Pins (including ESD grounding PIN). The LCD type is semi-transmissive FSTN positive display with white LED backlight. If customers need different LCD types and LED combinations, please contact us.

Data Source ref: RX12864L-FHW

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Item	Dimension	Unit
Structure	COG
Size (Diagonal)	2.24	inch
Dot Matrix / Resolution	128 × 64	dots
Module Dimension	60.10 × 44.50 × 5.01	mm
Viewing Area	54.6 × 32.0	mm
Active Area	49.89 × 27.49	mm
Dot / Pixel Size	0.36 × 0.40	mm
Dot / Pixel Pitch	0.39 × 0.43	mm
Backlight Type	LED
IC	ST7567A
Interface	SPI / I2C
Power Supply	3.0V
Duty	1/65 duty cycle, 1/9 Bias
Type	Graphic LCD Display

Pin No.

Symbol

Description

ESD

SI2

SI2 selects the interface type: I2C serial interface or not

SI2	Selected Interface
"L"	Serial 4-Line SPI Interface
"H"	I2C Serial Interface

VG is the LCD driving voltage for segment circuits

XV0

XV0 is the LCD driving voltage for common circuits at positive frame.

V0 is the LCD driving voltage for common circuits at negative frame.

VSS

GROUND

VDD

POWER

SDA

D[1:3] must be connected together as SDA.
D[4:7]=(1,1,1,1): ID Pin. D[4:7] should fix to “H” or “L” by VDDH or
VSSL.

SCL

It determines whether the access is related to data or command. A0=“H” : Indicates that signals on D[7:0] are display data.
A0=“L” : Indicates that signals on D[7:0] are command.

RSTB

Hardware reset input pin. When RSTB is “L”, internal initialization is executed and the internal registers will be initialized.

CSB

Chip select input pin. Interface access is enabled when CSB is “L”.
When CSB is non-active (CSB=“H”), D[7:0] pins are high impedance.

ESD

128x64 Monochrome COG Display Module - RX12864L

Item	Symbol	Min	Typ	Max	Unit
Operating Temperature	TOP	-20	－	+70	℃
Storage Temperature	TST	-30	－	+80	℃
Input Voltage	VI	-0.3	－	VDD+0.3	V
Digital Power Supply Voltage	VDD-Vss	-0.3	－	4.0	V
LCD Power supply voltage	V0-XV0	-0.3	－	18.0	V

Item	Symbol	Condition	Min	Typ	Max	Unit
Supply Voltage For Logic	VDD-VSS	－	2.9	3.0	3.1	V
Supply Voltage For LCD	VOP	Ta=-20℃ Ta=25℃ Ta=70℃	－ 9.3 －	－ 9.5 －	－ 9.7 －	V V V
Input High Volt.	VIH	－	0.7VDD	－	VDD	V
Input Low Volt.	VIL	－	VSS	－	0.3VDD	V
Supply Current	IDD	－			2.0	mA

Please see comparison of transmission interface between RX12864L and RX12864A1 below. The new design of RX12864L is a better option for you to look at.

RX12864L:
RX12864L Pin