Display Elektronik GmbH LCD MODULE DEM 20233 SYH-LY Product Specification Version : 2 21.04.
DEM 20233 SYH-LY Product Specification GENERAL SPECIFICATION MODULE NO. : DEM 20233 SYH-LY CUSTOMER P/N VERSION NO. CHANGE DESCRIPTION 0 ORIGINAL VERSION 25.07.2006 1 UPDATE IC CORRECT OPERATING VOLTAGE 16.01.2008 2 PREPARED BY: APPROVED BY: VERSION: 2 KD MH DATE 21.04.2010 DATE: 21.04.2010 DATE: 21.04.
DEM 20233 SYH-LY Product Specification CONTENTS 1. Functions & Features 1 2. Mechanical specifications 1 3. Block diagram 1 4. Dimensional Outline 2 5. Pin description 3 6. Maximum absolute limit 3 7. Electrical characteristics 3 8. Backlight characteristics 4 9. Electro-Optical characteristics 4 10. Timing Characteristics 5 11. Control and display command 7 12. Character ROM 8 13.
DEM 20233 SYH-LY Product Specification 1. FUNCTIONS & FEATURES Display Format LCD Mode Viewing Direction Driving scheme Power supply voltage (VDD) LCD driving voltage(Vop) Operation Temperature Storage Temperature Backlight : 20x2 Characters : STN / Positive / Transflective / Yellow-Green : 6 o’clock : 1/16 Duty , 1/5 Bias : 5.0 Volt (typ.) : 3.8 Volt (typ. at 25°C) : -20°C ~ 70°C : -30°C ~ 80°C : LED, Yellow-Green, Lightbox 2.
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DEM 20233 SYH-LY Product Specification 5. PIN DESCRIPTION No. 1 2 3 4 5 6 7-14 15 16 Symbol VSS VDD V0 RS R/W E DB0~DB7 LEDA LEDK Function GND(0V) Power supply for Logic(+5.0V) Power supply for LCD drive Register selection (H: Data register , L :Instruction register) Read/write selection (H: Read , L: Write) Enable signal for LCM Data Bus lines Power supply for Backlight(Current:580mA,Reference Voltage:5.0V) Power supply for Backlight(0V) 6.
DEM 20233 SYH-LY Product Specification 8. BACKLIGHT CHARACTERISTICS (Ta = 25°C ) Item Forward Voltage Reverse Current Luminous Intensity (Without LCD) Wave length(Without LCD) Symbol VF IR Condition IF=580mA VR=3V Min 3.8 --- Typ 4.0 --- Max 4.2 10 Unit LV IF=580mA 165 220 --- Cd/m2 λρ IF=580mA 569 572 575 nm V uA Color Bottom YG Note: when the temperature exceed 25°C, the approved current decrease rate for Backlight change as the temperature increase is: -0.
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DEM 20233 SYH-LY Product Specification Write Mode Timing Diagram Read Mode Timing Diagram VERSION: 2 PAGE: 6
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DEM 20233 SYH-LY Product Specification 13. PRECAUTION FOR USING LCD/LCM LCD/LCM is assembled and adjusted with a high degree of precision. Do not attempt to make any alteration or modification. The followings should be noted. 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.
DEM 20233 SYH-LY Product Specification Operation Precautions: 1. The viewing angle can be adjusted by varying the LCD driving voltage Vo. 2. Since applied DC voltage causes electro-chemical reactions, which deteriorate the display, the applied pulse waveform should be a symmetric waveform such that no DC component remains. Be sure to use the specified operating voltage. 3. Driving voltage should be kept within specified range; excess voltage will shorten display life. 4.
