12864 dot matrix with Chinese font LCD / LCM module parallel port serial display Dimensions 93x70mm

Supplier ID: 107849315

Price: $12.86 USD






1.6寸1.63寸320
200.00元
总库存9988
1.6寸1.66寸彩色O
200.00元
总库存999981
320240液晶显示屏5
275.00元
总库存99989
1.54寸OLED显示屏
75.00元
总库存99943
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【部分商品】限购两件活动日期: 2014-04-04 15:42:42 - 2014-04-11 00:00:00

单笔订单满 300 10 元, 包邮

 

    中文字库点阵液晶模块使用手册
 
                         12864ZB  
     LCD MODULE USER MANUAL
 1.  FUNCTIONS & FEATURES
 
 
Features
一  Dot Matrix: 128×64 Dots
一  LCD Mode: STN
一  Controller IC: ST7920or Equivalent
一  Driving Method: 1/64 Duty; 1/6 Bias
一  Viewing Angie: 6 O’clock direction
一  6800 family 8-Bit/4-Bit or serial MPU Interface
一  Backlight: LED
一  Operating Temperature Range: -20 to 70℃; 
一  Storage Temperature Range : -30 to 80℃;
Note: Color tone is slightly changed by temperature and driving voltage.

4.  BLOCK DIAGRAM

MPU read timing

When PSB=H, the LCD module is in parallel interface mode. 8-bit or 4-bit bus interface could
be selected by FUNCTION SET instruction DL bit.  
In 4-bit bus interface, every 8-bit instruction/data is separated into two parts. First, transfer the
higher 4-bit(D7-D4), then transfer the lower 4-bit(D3-D0). They are transferred via DB7-DB4
terminals, where DB3-DB0 are not in used (leave open or pull high).
 
9.3.  Using Serial Interface
When PSB=L, the LCD module is in serial interface mode (write only). In this mode, CS pin
should be used. CS=H, enable the data transfer. CS=L, reset the serial data counter, terminate
the data transition and clear the data buffer. As the controller IC has no instruction buffer area,
it must wait for the previous instruction to finish before sending the next one. Thus transferring
multiple instruction/data, execution time must be considered. Starting a transmission, a start
byte is required. It consists 5 consecutive “1” follow with a “0”, as RS bit (register select bit)
and a “0”. Then the 8-bit instruction/data should be separated into 2 groups. First group is
DB7-DB4, followed by 4 consecutive “0”. The second group is DB3-DB0 with 4 consecutive
“0”. See the follow data sequence diagram for detail:

9.4.  Display Memory Map
There are 3 main memory-areas in the LCD module for displa
一  Character Generator RAM (CGRAM);
一  Graphic Display RAM (GDRAM);
一  Display Data RAM (DDRAM).

9.4.2 Graphic Display RAM (GDRAM)
GDRAM is for full graphics display. It could be displayed when G=1(set by Extended Function
Set in Extended instruction Set ).  

Note: 
一  The mapping is based on Vertical Scroll Displacement Address=0;  
一  Another 128×64 Graphics display RAM space is not showed. They could be displayed
adjusting the Vertical Scroll Displacement Address value.
 
 
9.4.3 Display Data RAM (DDRAM)
GB character code (16-bit, A1A0h-F7FFh)  could write into DDRAM for displaying the
simplified Chinese character (16×16 dots font). User characters defined by user that stored in
CGRAM could also be used. The display character should be on grid only.  

Note: 
一  The mapping is based on Vertical Scroll Displacement Address=0;  
一  Another 8×4(characters) Display Data RAM space is not showed. They could be
displayed adjusting the Vertical Scroll Displacement Address value.
 
Standard ASCII code (00h-7fh) could write into DDRAM for displaying the standard ASCII
character (8×16 dots font). The display character should be on grid only, and 2 characters
should be written in each write operation.

Note: 
一  The mapping is based on Vertical Scroll Displacement Address=0;  
一  Another 16×4(characters) Display Data RAM space is not showed. They could be
displayed adjusting the Vertical Scroll Displacement Address value.
 
 
9.5.  Display Control Instructions
 
Basic Instruction Set

一  For the details of the display control instructions, please refer to ST7920 datashee;
一  RE is the selection byte of basic and extended instruction set. Each tine altering the value  
of RE, it will remain. Thus, it is not necessary to set RE every time when using the same
group of instruction set.  
 
 
 
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 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