Circular LCD Screen, Circular LCD Display Module 128x128
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
Description
The WO128128A is a COG monochrome graphic circular LCD display module with a 128x128 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
DRAWING
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 | |
| 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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