LC12864B
Contents
1. The LCD module should be initialized by setting RST terminal at low level when turning the power When RST pull low the LCD module will Display on Display start line register becomes 0 Z address 0 While RST is low no instructions can be accepted except status read Therefore execute other instructions after making sure that DB4 0 clear RST and DB7 0 ready by status read instruction the condition of power supply at initial power up are as follow Items Symbol Min TYP Max Unit Reset time tis 2 0 uS Rise time t 150 nS 9 4 Display Memory Map Page X address Data LCD Display font view DB7 0 DBO q 7 DB7 6 DBO mesa DB7 E a 7 DBO E E i i Column driver Y1 Y2 eee Y63 Y4 Y1 Y2 sae Y63 Y4 Column Y address 00h 3Fh 00h 3Fh Total 64 X 64dots 64 X 64dots pueda CS1 0 CS2 1 CS 1 1 CS2 0 CSA 1 CSB 0 CSA 0 CSB 1 Note Display start line Z address 0 The display data store separated in two divers The display data for the left section could be accessed by setting CS1 0 The display data for the right section could be accessed by setting CS2 0 9 5 Internal registers There are three registers in each section of LCD module Each of them could be controlled independently 9 5 1 Page X Address Register X address register designates pages of inte2. 2 For the details of the display control instructions please refer to KS0108B datasheet 10 DESIGN AND HANDING PRECAUTION 10 1 The LCD panel is made by glass Any mechanical shock eg Dropping form high place will damage the LCD module Do not add excessive force on the surface of the display which may cause the Display color change abnormally 10 2 The polarizer on the LCD is easily get scratched If possible do not remove the LCD protective film until the last step of installation 10 3 Never attempt to disassemble or rework the LCD module 10 4 Only Clean the LCD with Isopropyl Alcohol or Ethyl Alcohol Other solvents eg water may damage the LCD 10 5 When mounting the LCD module make sure that it is free form twisting warping and distortion 10 6 Ensure to provide enough space with cushion between case and LCD panel to prevent external force adding on it or it may cause damage to the LCD or degrade the display result 10 7 Only hold the LCD module by its side Never hold LCD module by add force on the heat seal or TAB 10 8 Never add force to component of the LCD module It may cause invisible damage or degrade of the reliability 10 9 LCD module could be easily damaged by static electricity Be careful to maintain an optimum anti static work environment to protect the LCD module 10 10 When peeling of the protective film form LCD static charge may cause abnormal display pattern It is normal and will resume to normal
3. 1 CS1 L Chip Selection A When CSA and CSB are not 2 CS2 L Chip Selection B used 3 VSS OV Power Ground 4 VDD 5 0V Power Supply For Logic 5 Vo Contrast Adjust 6 RS H L H Data L Command 7 R W H L H Read L Write 8 E H H gt L Enable Signal 9 DBO ne ox H L Data Bus 16 DB7 17 CSA H Chip Selection A When CS1 and CS2 are not used 18 CSB H Chip Selection B 19 RST L Reset Signal 20 Vout Negative Power output For LCD Driving 21 LEDA 5 0V Power Supply For LED Backlight 22 LEDK OV Note Both CS1 CS2 and CSA CSB can be used as chip selection signals CSI and CS2 are low active CSA and CSB are high active When CS1 and CS2 are used please left CSA and CSB open When CSA and CSB are used please left CS1 and CS2 open 7 MAXIMUM ABSOLUTE LIMIT T 25 C Items Symbol Standard Value Unit Supply Voltage Vdd 0 3 7 0 V Input Voltage Vin Vss Vdd V Operating Temperature Top 20 70 Cc Storage Temperature Tst 30 80 C Note Voltage greater than above may damage the module All voltages are specified relative to Vss 0V 8 ELECTRICAL CHARACTERISTICS 8 1 DC Characteristics VDD 5V VSS 0V Ta 0 50 C Items Symbol Min TYP Max Unit Condition Operating Voltage Vdd 4 8 5 0 5 2 V Vdd Supply Current Idd 8 15 mA except LED backlight Input High Voltage Vin 2 0 Vdd V RS RW E DB0 DB7 Input Low Voltage Vil 0 0 8 V Output High
4. Voltage Voh 2 4 V loh 0 1mA DB0 DB7 Output Low Voltage Vol _ 0 4 V Iol 0 1mA DB0 DB7 LCD Driving Voltage Vicd 9 7 10 0 10 3 V Vdd VO 8 2 AC Characteristics VDD 5V VSS 0V TTa 20 75 Items Symbol Min TYP Max Unit E cycle time tc 1000 ns E high level width tw 450 ns E low level width twL 450 ns E rise time tr 25 nS E fall time tr 25 nS Address set up time tasu 140 ns Address hold time tan 10 nS Data set up time tosu 200 ns Data delay time tp 320 ns Data hold time write touw 10 nS Data hold time read toar 20 o nS MPU write timing 2 0V CSLCS2RS 0 8V tDsu tDuw DSU DEW gt DB0 DB7 gt MPU read timing R W CS1 CS2 RS 9 FUNCTION SPECIFICATIONS 9 1 Basic Setting To drive the LCD module correctly and provide normally display please use the following setting Display start line Z address 0 LCD display ON Note These setting commands should issue to both controllers while start up See the Display control instructions section for details 9 2 Adjusting The LCD Display Contrast A Variable Resistor must be connected to the LCD module for providing a reference to VO The recommended value of the Variable Resistor is 20K to 50K VOUT or VEE VO 20K 9 3 Resetting The LCD Module
5. in a short while 10 11 Take care and prevent get hurt by the LCD panel edge 10 12 Never operate the LCD module exceed the absolute maximum ratings 10 13 Keep the signal line as short as possible to prevent noisy signal applying to LCD module 10 14 Never apply signal to the LCD module without power supply 10 15 IC chip eg TAB or COG is sensitive to the light Strong lighting environment could possibly cause malfunction Light sealing structure casing is recommend 10 16 LCD module reliability may be reduced by temperature shock 10 17 When storing the LCD module avoid exposure to the direct sunlight high humidity high temperature or low temperature They may damage or degrade the LCD module
6. HHUUUOUUUUUUUO SHENZHEN SMILEWAY ELECTRONICS CO LTD A FST FZ BE YC A RR BEF TEMA LCM12864B LCD MODULE USER MANUAL DOB gg a gn 000000000000 A O O 518103 O O U 0 55 33168357 O O O 0 55 23201502 O O O ww snl evayl cd com O O O 0 O 400 0988 516 1 FUNCTIONS amp FEATURES Features Dot Matrix 128 X 64 Dots LCD Mode STN Controller IC KS0107 or Equivalent Driving Method 1 64 Duty 1 9 Bias Viewing Angie 6 O clock direction 6800 serial 8 Bit MPU Interface Backlight LED Operating Temperature Range 20 to 70 C Storage Temperature Range 30 to 80 C Note Color tone is slightly changed by temperature and driving voltage MECHANICAL SPECIFICATIONS ITEM SPECIFICATIONS UNIT Module Size 93 0L X 70 0W X 13 0 max H mm View Area 70 7 X 38 8 mm Effective Area 128 X 64 dots Dot Size 0 48 X 0 48 mm Dot Pitch 0 52 X 0 52 mm 3 EXTERNAL DIMENSIONS e 49250 a MAXI3 0 4 7 5 00PAD 66 52XA A 90 03 22 y 4 BLOCK DIAGRAM KS0107 64COM LCD PANEL Angy 128x64 dots i i 64SEG 64SEG VDD VSS DC DC KS0108 KS0108 vo Converter or Eqv or Eqv ai EFA Eia DB0 DB7 RS R W E RST CS1 CS2 LEDA A LED Backlight LEDK 5 POWER SUPPLY LCD MODULE VDD vo VSS 6 PIN DESCRIPTION ITEM SYMBOL LEVEL FUNCTION
7. rnal display data RAM Count function is not available The address should be set by instruction 9 5 2 Column Y Address Register Y address register designates address of internal display data RAM It could be set by instruction and it increased by 1 automatically by read or write display data operations 9 5 3 Display Start line Z Register Y address register indicates of display data RAM to LCD top line It may be used for scrolling the display pattern on the LCD Instructions Display on off ofololo 1 1 1 1 1 10 Function Controls the display on or off Internal status and display data in RAM is not affected O off 1 on Set Column Y Address Set Page X Address 0 0 0 1 Y address 0 63 4 1 4 X address 0 7 Set the Column address into the Y address counter Set the Page address into the X address register Set Display Start Line Z address Status Read Z address 0 63 Indicates the display data RAM displayed at the top of the screen Read status Busy L Driver ready Busy H Driver busy on off L Display is on on off H Display is off Reset L Normal Running Reset H reset Write display data into display data RAM After writing instruction Y address counter increased by 1 automaticall Read Display Data 1 1 Read data Read display data form the display data RAM 4 Write Display Data Note 1 Only one section driver could be read at the same time
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