TFT | CHARACTER | UWVD | FSC | SEGMENT | CUSTOM | REPLACEMENT Character LCD Module Part Number C204A-BW-LW65 • Wide Temperature • RoHS Compliant

This is a STN (Super-Twisted Nematic) Blue Negative Character LCD (Liquid Crystal Display) that can display twenty characters on four lines (20x4). This model is composed of a transmissive type LCD panel, a build in driver IC and a backlight unit. Character Format: 5x7 Dots with Cursor Display Format: 20 Characters x 4 Lines Interface: Parallel RoHS Compliant

2) . D isplay Type: STN Blue Negative, Transmissive, 6:00 Viewing Angle 3) . Operating Temp: -20°C~70°C Storage Temp: -30°C~80°C 4) . Backlight Type: Edge White <♦ FocusLCDs.com LCDs MADE SIMPLE®

2. Input Terminal Pin Assignment 4. Contrast Adjusting Circuit

5. LCD Optical Characteristics 6. Electrical Characteristics 6.1 Absolute Maximum Rating (Ta=25 °C, VSS=0V)

7. Timing Characteristics Parameter Write Mode Timing Diagram Read Mode Timing Diagram

8. Instructions To overcome the speed difference between the internal clock of ST7066 (or equivalent) and the MPU clock, ST7066 performs internal operations by storing control in formations to IR or DR. The internal operation is determined according to the signal from MPU, composed of read/write and data bus. Instructions can be divided largely into four groups: 1) ST7066 function set instructions (set display methods, set data length, etc.) 2) Address set instructions to internal RAM 3) Data transfer instructions with internal RAM The address of the internal RAM is automatically increased or...

Set the moving direction of cursor and display. I/D: increment / decrement of DDRAM address (cursor or blink) When I/D="high", cursor/blink moves to right and DDRAM address is increased by 1. When I/D="Low", cursor/blink moves to left and DDRAM address is increased by 1. CGRAM operates the same way as DDRAM, when reading from or writing to CGRAM. SH: shift of entire display When DDRAM read (CGRAM read/write) operation or SH="Low", shifting of entire display is not performed. If SH ="High" and DDRAM write operation, shift of entire display is performed according to I/D value. (I/D="high". shift...

This instruction makes DDRAM data available from MPU. When 1-line display mode (N=LOW), DDRAM address is form "00H" to "4FH".In 2-line display mode (N=High), DDRAM address in the 1st line form "00H" to "27H", and DDRAM address in the 2nd line is from "40H" to "67H". Read binary 8-bit data from DDRAM/CGRAM. The selection of RAM is set by the previous address set instruction. If the address set instruction of RAM is not performed before this instruction, the data that has been read first is invalid, as the direction of AC is not yet determined. If RAM data is read several times without RAM address...

9. Cautions and Handling General Precautions: 1. LCD panel is made of glass. Avoid excessive mechanical shock or applying strong pressure onto the surface of display area. 2. The polarizer used on the display surface is easily scratched and damaged. Extreme care should be taken when handling. To clean dust or dirt off the display surface, wipe gently with cotton, or other soft material soaked with isoproply alcohol, ethyl alcohol or trichlorotriflorothan. Do not use water, ketone or aromatics and never scrub hard. 3. Do not tamper in any way with the tabs on the metal frame. 4. Do not make any...