Chip-on-Glass LCD Module 128×64

Model No. WO12864C2

  • COG LCD 128×64
  • Graphic LCD
  • IC: ST7565P
  • 3.3V power supply
  • 1/64 duty cycle
  • Interface : 6800/8080/SPI
Category:

Description

WO12864B is a 2.8 inch 128×64 COG monochrome Graphic LCD module. This LCD module is built in with ST7565P controller or equivalent IC.  It supports 6800 8-bit, 8080 8-bit parallel and SPI interface. This LCD module can be operating at temperatures from -20℃ to +70℃; its storage temperatures range from -30℃ to +80℃.  This WO12864B COG display is very suitable for the applications that demand more compact package displays.

There are two versions for WO12864B series, which is different on thickness as below:
►WO12864B : thickness 12.1mm (Max)
►WO12864B1 : thickness 6.0mmWO12864A1 is a 2.2 inch 128×64 COG monochrome Graphic LCD module. This LCD module is built in with ST7565P controller or equivalent IC.  It supports 6800 8-bit, 8080 8-bit parallel and SPI interface. This LCD module can be operating at temperatures from -20℃ to +70℃; its storage temperatures range from -30℃ to +80℃.  This LCD COG 128×64 display is very suitable for the applications that demand more compact package displays.

Drawing

Drawing


Data source ref:WO12864C2-TFH#

Interface Pin Function

Interface Pin Function

Pin No. Symbol Level Description
1 IRS I This terminal selects the resistors for the V0 voltage level adjustment.
IRS = “H”: Use the internal resistors
IRS = “L”: Do not use the internal resistors. The V0 voltage level is 

regulated by an external resistive voltage divider attached to the VR terminal
2 /HPM I This is the power control terminal for the power supply circuit for liquid crystal drive.
/HPM = “H”: Normal mode
/HPM = “L”: High power mode (Default)
3 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
4 C86 I This is the MPU interface selection pin.
C86 = “H”: 6800 Series MPU interface.
C86 = “L”: 8080 Series MPU interface
5 VR I Output voltage regulator terminal. Provides the voltage between VSS and V0 through a resistive voltage divider.
IRS = “L” : the V0 voltage regulator internal resistors are not used.
IRS = “H” : the V0 voltage regulator internal resistors are used.
6~10 V0~V4 Power supply This is a multi-level power supply for the liquid crystal drive.
11 VRS Power supply This is the internal-output VREG power supply for the LCD power supply voltage regulator
12 CAP4+ O DC/DC voltage converter.
13 CAP2- O DC/DC voltage converter. Connect a capacitor between this terminal and the CAP2P terminal.
14 CAP2+ O DC/DC voltage converter. Connect a capacitor between this terminal and the CAP2N terminal.
15 CAP1+ O DC/DC voltage converter. Connect a capacitor between this terminal and the CAP1N terminal.
16 CAP1- O DC/DC voltage converter. Connect a capacitor between this terminal and the CAP1P terminal.
17 CAP3+ O DC/DC voltage converter. Connect a capacitor between this terminal and the CAP1N terminal.
18 CAP5+ O DC/DC voltage converter.
19 VOUT O DC/DC voltage converter. Connect a capacitor between this terminal and vss or VDD
20 VSS Power supply Ground
21 VDD Power supply Power supply
22~29 D7~D0 I/O Data bus line
30 /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.
31 /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.
32 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.
33 /RES I When RES is set to “L”, the setting are initialized.
34 /CS1 I This is the chip select signal.

Mechanical Data

Mechanical Data

Item Dimension Unit
Number of Dots 128 x 64 －
Module dimension 55.2 x 39.8 x 6.5 mm
View area 45.2 x 27.0 mm
Active area 40.92 x 24.28 mm
Dot size 0.28 x 0.34 mm
Dot pitch 0.32 x 0.38 mm
Duty 1/65 , 1/9 Bias
Backlight Type LED
IC ST7565P
Interface 6800/8080/4-Line SPI

Absolute Maximum Ratings

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 － 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

Electrical Characteristics

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 LCM V0-VSS Ta=-20℃
Ta=25℃
Ta=70℃		 －
9.4
－		 －
9.6
－		 －
9.8
－		 V
V
V
Input High Volt. VIH － 0.8 VDD － VDD V
Input Low Volt. VIL － VSS － 0.2VDD V
Output High Volt. VOH － 0.8VDD － VDD V
Output Low Volt. VOL － VSS － 0.2VDD V
Supply Current(No include LED Backlight) IDD VDD=3.0V － 0.49 1.0 mA

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