Graphic COG LCD 256x128
Model No. WO256128A
►LCD COG Module
►Graphic LCD
►256x128 dots
►IC: ST75256
►+3.3V power supply
►1/128 duty cycle
►Interface : 6800/8080/SPI/I2C
Description
WO256128A is a monochrome graphic LCD module made of 256x128 pixels, diagonal size 2.9 inch. This LCD Module WO256128A is built in with ST75256 controller IC, it supports 6800 8-bit, 8080 8-bit parallel and 4-wire serial SPI and I2C interface. The WO256128A is having the same outline dimension, and VA size and same power supply 3.3V as WO12864D3, but is having a much higher resolution and performance. The WO125128A is an upgrade version of WO12864D3 to meet with the customers’ requirement on higher resolution and the best thing is that the customers don’t have to change the mechanical design for their applications.
This module can be operating at temperatures from -20℃ to +70℃; its storage temperatures range from -30℃ to +80℃. The WO256128A is available for different LCD mode options, STN Negative, FSTN Negative (Double film) and FSTN positive and with LED backlight options, like white LED. Please contact with us if you need different LCD type and LED combination.
DRAWING
Data source ref: WO256128A-TFH#
SPECIFICATIONS
Interface Pin Function
Pin No. | Symbol | Description | |||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1 | ITOGND | ESD PIN | |||||||||||||||
2 | VG | Power of SEG-drivers | |||||||||||||||
3 | V0 | Positive operating voltage of COM-drivers | |||||||||||||||
4 | XV0 | Negative operating voltage of COM-drivers | |||||||||||||||
5 | CA1P | DC/DC Voltage converte pin | |||||||||||||||
6 | CA1N | DC/DC Voltage converte pin | |||||||||||||||
7 | VDDA | +3.3V | |||||||||||||||
8 | VDD | +3.3V | |||||||||||||||
9 | VSS | ground | |||||||||||||||
10 | COMSCN | Set scan directing of COM | |||||||||||||||
11 | IF1 | These pins select interface operation mode
|
|||||||||||||||
12 | IF0 | ||||||||||||||||
13 | CSB | Chip select input pin | |||||||||||||||
14 | A0 | Whether the access is related to data or command | |||||||||||||||
15 | ERD | Read or write enable terminal | |||||||||||||||
16 | RWR | Read/Write execution control pin | |||||||||||||||
17 | RSTB | Reset input pin | |||||||||||||||
18~25 | D0~D7 | Data bus line | |||||||||||||||
26 | ITOGND | ESD PIN |
Mechanical Data
Item | Dimension | Unit |
---|---|---|
Number of dots | 256 × 128 | - |
Module dimension | 80.0 × 54.0 × 9.5 | mm |
View area | 70.7 × 38.8 | mm |
Active area | 66.54 × 33.26 | mm |
Dot size | 0.24 × 0.24 | mm |
Dot pitch | 0.26 × 0.26 | mm |
Drive Method | 1/128 DUTY,1/12 BIAS | |
Backlight Type | LED | |
IC | ST75256i | |
Interface | 4-Line SPI/IIC/8-bit 6800/8-bit 8080 |
Absolute Maximum Ratings
Item | Symbol | Min | Typ | Max | Unit |
---|---|---|---|---|---|
Operating Temperature | TOP | -20 | - | 70 | ℃ |
Storage Temperature | TST | -30 | - | 80 | ℃ |
MPU Interface Input Voltage | VIN | -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 | - | 19.0 | V |
Electrical Characteristics
Item | Symbol | Condition | Min | Typ | Max | Unit |
---|---|---|---|---|---|---|
Supply Voltage For Logic | VDD-VSS | - | 3 | 3.3 | 3.6 | V |
Supply Voltage For LCM | VOP | Ta=-20℃ Ta=25℃ Ta=70℃ |
- 14.2 - |
- 14.5 - |
- 14.8 - |
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=3.3V | - | 1.5 | - | mA |
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