COG LCD Display 2.82-inch 128×64 COG Module - RX12864B - Raystar
COG LCD Display 2.82-inch 128×64 COG Module - RX12864B - Raystar
COG LCD Display 2.82-inch 128×64 COG Module - RX12864B - Raystar
COG LCD Display 2.82-inch 128×64 COG Module - RX12864B - Raystar
COG LCD Display 2.82-inch 128×64 COG Module - RX12864B - Raystar
COG LCD Display 2.82-inch 128×64 COG Module - RX12864B - Raystar
COG LCD Display 2.82-inch 128×64 COG Module - RX12864B - Raystar
COG LCD Display 2.82-inch 128×64 COG Module - RX12864B - Raystar

COG LCD Display Module 2.82-inch 128×64 Graphic Type (ST7565P IC)

Model No. RX12864B

The RX12864B is a 2.82-inch 128×64 COG LCD Module designed for compact and durable COG display applications. Measuring 89.7×49.8 mm with an active area of 63.97×31.97 mm, this COG LCD display delivers clear and stable visual performance. Powered by the ST7565P IC, it supports both 8080 and 6800 parallel interfaces, providing flexible system integration for industrial devices. An added frame with four screw holes allows for quick and secure mounting, making installation easy and reliable for COG LCD module applications in embedded systems.

The RX12864B COG LCD operates within a wide temperature range from –20°C to +70°C and supports a 2.7V–3.3V logic supply voltage. With its compact form factor and COG construction, this LCD COG module is ideal for control panels, handheld instruments, and measurement devices. The LED backlight enhances readability, while the 1/65 duty and 1/9 bias configuration ensure consistent brightness and excellent contrast.

If you need technical support or product quotes for the RX12864B or other COG LCD display modules, please feel free to contact our sales team!

Data Source Ref: RX12864B-BIW

Inquiry or Demo Code Datasheet Back Previous Next
  • General Specs
  • Interface Pin Function
  • Contour Drawing
  • Absolute Maximum Ratings
  • Electrical Characteristics
Item Dimension Unit
Structure COG
Size (Diagonal) 2.82 inch
Dot Matrix / Resolution 128 × 64 dots
Module Dimension 89.7 × 49.8 × 12.1 (Max.) mm
Viewing Area 69.0 × 36.5 mm
Active Area 63.97 × 31.97 mm
Mounting Hole 82.7 × 40.2 mm
Dot / Pixel Size 0.47 × 0.47 mm
Dot / Pixel Pitch 0.50 × 0.50 mm
IC ST7565P
Interface 6800 / 8080 / SPI
Power Supply 3.3V
Duty 1/65 duty cycle, 1/9 Bias
Type Graphic LCD Display, COG LCD Display

8080 / 6800 Parallel Interface and Signal Description

Pin No. Symbol I/O Description
1 /CS1B I This is the chip select signal.
2 /RES I When RES is set to “L”, the setting are initialized.
3 A0 I This is connect to the least significant bit of the normal MPU address bus, and it determines whether the data bits are data or command.
A0 = “H”: Indicates that D0 to D7 are display data.
A0 = “L”: Indicates that D0 to D7 are control data.
4 /WR(R/W) I • When connected to 8080 series MPU, this pin is treated as the “/WR” signal of the 8080 MPU and is LOW-active.
The signals on the data bus are latched at the rising edge of the /WR signal.
• When connected to 6800 series MPU, this pin is treated as the “R/W” signal of the 6800 MPU and decides the access type :
When R/W = “H”: Read.
When R/W = “L”: Write.
5 /RD(E) I • When connected to 8080 series MPU, this pin is treated as the “/RD” signal of the 8080 MPU and is LOW-active.
The data bus is in an output status when this signal is “L”.
• When connected to 6800 series MPU, this pin is treated as the “E” signal of the 6800 MPU and is HIGH-active.
This is the enable clock input terminal of the 6800 Series MPU.
6~13 D0~ D7 I/O Data bus line
14 VDD Power
Supply		 Power supply
15 VSS Power
Supply		 Ground
16 VOUT O DC/DC voltage converter. Connect a capacitor between this terminal and vss or VDD
17 CAP3P O DC/DC voltage converter. Connect a capacitor between this terminal and the CAP1N terminal.
18 CAP1N O DC/DC voltage converter. Connect a capacitor between this terminal and the CAP1P terminal.
19 CAP1P O DC/DC voltage converter. Connect a capacitor between this terminal and the CAP1N terminal.
20 CAP2P O DC/DC voltage converter. Connect a capacitor between this terminal and the CAP2N terminal.
21 CAP2N O DC/DC voltage converter. Connect a capacitor between this terminal and the CAP2P terminal.
22~26 V4~ V0 Power
Supply		 This is a multi-level power supply for the liquid crystal drive.

27		 VR I Output voltage regulator terminal. Provides the voltage between VSS and V0 through a resistive voltage divider.
28 C86 I This is the MPU interface selection pin.
C86 = “H”: 6800 Series MPU interface.
C86 = “L”: 8080 Series MPU interface
29 P/S I This is the parallel data input/serial data input switch terminal.
P/S = “H”: Parallel data input.
P/S = “L”: Serial data input.
The following applies depending on the P/S status:
P/S Data/Command Data Read/Write Serial Clock
"H" A0 D0 to D7 /RD, /WR X
"L" A0 SI (D7) Write only SCL (D6)

When P/S = “L”, D0 to D5 fixed  “H”.
/RD (E) and /WR (R/W) are fixed to either “H” or “L”.
With serial data input, It is impossible read data from RAM
30 NC - No connection.

RX12864B Mechanical Outline and Mounting Details

COG LCD Display 2.82-inch 128×64 COG Module - RX12864B Contour Drawing - Raystar

Operating Conditions and Voltage Limits

Item Symbol Min Typ Max Unit
Operating Temperature TOP -20 － +70 ℃
Storage Temperature TST -30 － +80 ℃
Power Supply Voltage VDD -0.3 － 3.6 V
Power Supply Voltage (VDD Standard) V0, VOUT -0.3 － 14.5 V
Power Supply Voltage (VDD Standard) V1, V2, V3, V4 -0.3 － V0+0.3 V

Power Supply, Logic Voltage, and Current Consumption

Item Symbol Condition Min Typ Max Unit
Supply Voltage For Logic VDD-VSS － 2.7 － 3.3 V
Supply Voltage For LCM Vo-VSS Ta=-20℃
Ta=25℃
Ta=70℃		 9.5
9.2
8.95		 9.8
9.45
9.2		 10.5
9.7
9.45		 V
V
V
Input High Volt VIH － 0.8 VDD － VDD V
Input Low Volt VIL － Vss － 0.2 VDD V
Output High Volt VOH IOUT=-0.5mA 0.8 VDD － VDD V
Output Low Volt VOL IOUT=0.5mA Vss － 0.2VDD V
Supply Current
(No Include LED Backlight)		 IDD － － 0.60 2.0 mA

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