DISPLAY Elektronik GmbH LCD MODULE DEM 20485 SYH Product Specification Version : 2 08.01.
GENERAL SPECIFICATION MODULE NO. : DEM 20485 SYH CUSTOMER P/N VERSION NO. CHANGE DESCRIPTION DATE 0 ORIGINAL VERSION 08.05.2003 1 CHANGE EXTERNAL DIMENSIONS 17.05.2003 1.1.0 CHANGE IC 14.11.2007 1.1.1 2 ADD J7 INFORMATION CHANGE MAXIMUM PARAMETER 07.07.2009 08.01.2018 PREPARED BY: CC DATE: 08.02.2018 APPROVED BY: MH DATE: 08.02.
DEM 20485 SYH Product Specification CONTENTS 1.FUNCTIONS & FEATURES ...................................................................................................................................................2 2. MECHANICAL SPECIFICATIONS......................................................................................................................................2 3. BLOCK DIAGRAM ................................................................................................................
DEM 20485 SYH Product Specification 1.FUNCTIONS & FEATURES MODULE NAME LCD TYPE DEM 20485 SYH STN Yellow-Green Reflective Positive Mode l l l l l Viewing Direction Driving Scheme Power Supply Voltage VLCD (VDD-V0) Display Format : 6 o’clock : 1/16 Duty Cycle, 1/5 Bias : 5.0 Volt (typ.) : 4.5 Volt (typ.
DEM 20485 SYH Product Specification 3. BLOCK DIAGRAM LCD PANEL R/W RS V0 LCD Controller LSI ST7066U-0A SEG1~SEG40 VDD VSS SEG121~SEG20 E 4 Line x 20 Characters SEG41~SEG120 COM1~COM16 DB0~DB7 SEGMENT DRIVER SEGMENT DRIVER ST7063 ST7063 Control signals 4.
DEM 20485 SYH Product Specification 5. PIN ASSIGNMENT Function Pin No.
DEM 20485 SYH Product Specification 6. PCB DRAWING AND DESCRIPTION 6.1 PCB Drawing DESCRIPTION: 6-1-1. In application module, J2=J3=J4=J5=J6=open 6-1-2. The metal-bezel can be on ground when the J1 is closed Note: In application module, J1= closed. 6-1-3. The mounting holes can be set to ground when J7 is closed. Note: In application module, J7 = closed.
DEM 20485 SYH Product Specification 7. DISPLAY DATA RAM (DDRAM) DISPLAY POSITION 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 FIRST LINE 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F 10 11 12 13 SECOND LINE 40 41 42 43 44 45 46 47 48 49 4A 4B 4C 4D 4E 4F 50 51 52 53 THIRD LINE 14 15 16 17 18 19 1A 1B 1C 1D 1E 1F 20 21 22 23 24 25 26 27 FOURTH LINE 54 55 56 57 58 59 5A 5B 5C 5D 5E 5F 60 61 62 63 64 65 66 67 DD RAM ADDRESS 8.
DEM 20485 SYH Product Specification 9-2 AC Characteristics (VDD=4.5V~5.
DEM 20485 SYH Product Specification 9-2-2 Read Mode (Reading Data from ST7066 to MPU) Characteristic E Cycle Time Symbol tC Min 1200 Type --- Max --- Unit ns Test PIN E --- --- 25 ns E E Fall Time tR tF --- --- 25 ns E E Pulse width tpW 140 --- --- ns E Address Setup Time tAS 0 --- --- ns R/W,RS,E Address Hold Time tAH 10 --- --- ns R/W,RS,E Data Setup Time tDDR --- --- ns DB0~DB7 Data Hold Time tH 10 --- 100 --- ns DB0~DB7 E Rise Time RS VIH1 V IL1
DEM 20485 SYH Product Specification 10. CONTROL AND DISPLAY COMMAND DB2 DB1 DB0 Execution time (fosc=270KHz) Remark 0 0 0 1 1.52ms Write”20H” to DDRAM. And set DDRAM address to “00H” from AC 0 0 0 1 x 1.52ms Set DDRAM address to “00H” from AC and return cursor to its original position if shifted. The contents of DDRAM are not changed. 0 0 0 1 I/D S 37us Sets cursor move direction and specifies display shift. These operations are performed during data write and read.
DEM 20485 SYH Product Specification 11.
DEM 20485 SYH Product Specification 12. LCD MODULES HANDLING PRECAUTIONS n Please remove the protection foil of polarizer before using. n The display panel is made of glass. Do not subject it to a mechanical shock by dropping it from a high place, etc. n If the display panel is damaged and the liquid crystal substance inside it leaks out, do not get any in your mouth. If the substance come into contact with your skin or clothes promptly wash it off using soap and water.
