10.Display Control Instruction The display control instructions control the internal state of the KS0108B. Instruction is received
from MPU to KS0108B for the display control. The following table shows various instructions Instruction D/I R/W DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0 Function Controls the display on or Display ON/OFF off. Internal status and 0 0 0 0 1 1 1 1 1 0/1 display RAM data are not affected. 0:OFF, 1:ON Sets the Y address in the Y address counter. Sets the X address at the X address register. Indicates the display data 0 0 1 1 Display start line(0~63) RAM displayed at the top of the screen. Read status. B R 0 ON/OFF E S E T 0 0 0 0 BUSY 0:Ready 1:In operation ON/OFF 0:Display ON 1:Display OFF RESET 0:Normal 1:Reset Writes data (DB0:7)into display data RAM. After 1 0 Display Data writing instruction, Y address is increased by 1 automatically. Set Address Set Page (X address) Display Start Line 0 0 0 0 0 1 1 0 Y address (0~63) 1 1 1 Page (0 ~7) Status Read 0 1 U S Y Write Display Data Read Display Data Reads data (DB0:7) from 1 1 Display Data display data RAM to the data bus. Page 11 of 25 WS-EP-008 10(A)
11.Detailed Explanation Display On/Off
0 0 0 0 1 1 1 1 1 D
The display data appears when D is and disappears when D is 0. Though the data is not on the screen with D = 0, it remains in the display data RAM. Therefore, you can make it appear by changing D = 0 into D = 1.
Display Start Line
R/W D/I DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0 0 0 1 1 A A A A A A
Z address AAAAAA ( binary ) of the display data RAM is set in the display start line register
and displayed at the top of the screen. Figure 2. shows examples of display ( 1/64 duty cycle ) when the start line = 0-3. When the display duty cycle is 1/64 or more ( ex. 1/32, 1/24 etc. ), the data of total line number of LCD screen, from the line specified by display start line instruction, is displayed
Set Page ( X Address )
R/W D/I DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0 0 0 1 0 1 1 1 A A A
X address AAA ( binary ) of the display data RAM is set in the X address register. After that,
writing or reading to or from MPU is executed in this specified page until the next page is set. See Figure 1.
Set Y Address
R/W D/I DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0 0 0 0 1 A A A A A A
Y address AAAAAA ( binary ) of the display data RAM is set in the Y address counter. After
that, Y address counter is increased by 1 every time the data is written or read to or from MPU.
Status Read
Page 12 of 25 WS-EP-008 10(A)
R/W D/I DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
R/W 0 D/I 1 DB7 Busy DB6 0 DB5 DB4 DB3 0 DB2 0 DB1 0 DB0 0 On/Off RESET Busy
When busy is 1, the LSI is executing internal operations. No instruction are accepted
while busy is 1, so you should make sure that busy is 0 before writing the next instruction. ON/OFF
Shows the liquid crystal display condition: on condition or off condition. When on/off is 1, the display is in off condition. When on/off is 0, the display is in on condition
RESET
RESET = 1 shows that the system is being initialized. In this condition, no instructions
except status read can be accepted.
RESET = 0 shows that initializing has system is in the usual operation condition. Write Display Data
R/W D/I DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
0 0 D D D D D D D D
Writes 8-bit data DDDDDDDD ( binary ) into the display data RAM. The Y address is
increased by 1 automatically. Read Display Data
R/W D/I DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
1 1 D D D D 1 D D D
Reads out 8-bit data DDDDDDDD ( binary ) from the display data RAM. Then Y address is
increased by 1 automatically.
One dummy read is necessary right after the address setting. For details, refer to the
Y Address012page 0616263X = 0DB0toDB7DB0toDB7page 1X = 1DB0toDB7DB0toDB7page 6X = 6page 7X = 7Figure 1. explanation of output register in ―Function of Each Block‖.
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12.Reliability Content of Reliability Test (wide temperature, -20℃~70℃)
Environmental Test Test Item High Temperature storage Low Temperature storage Content of Test Endurance test applying the high storage temperature for a long time. Endurance test applying the high storage temperature for a long time. Endurance test applying the electric stress High Temperature (Voltage & Current) and the thermal stress to the Operation element for a long time. Low Temperature Endurance test applying the electric stress under Operation low temperature for a long time. The module should be allowed to stand at 60℃,90%RH max High Temperature/ For 96hrs under no-load condition excluding the Humidity Operation polarizer, Then taking it out and drying it at normal temperature. The sample should be allowed stand the following 10 cycles of operation -20℃ 25℃ 70℃ Thermal shock resistance 30min 5min 30min 1 cycle Test Condition 80℃ 200hrs -30℃ 200hrs 70℃ 200hrs -20℃ 200hrs 60℃,90%RH 96hrs Note 2 1,2 —— 1 1,2 -20℃/70℃ 10 cycles —— Total fixed amplitude : 15mm Vibration Frequency : Endurance test applying the vibration during 10~55Hz Vibration test 3 transportation and using. One cycle 60 seconds to 3 directions of X,Y,Z for Each 15 minutes VS=800V,RS=1.5kEndurance test applying the electric stress to the Ω Static electricity test —— terminal. CS=100pF 1 time Note1: No dew condensation to be observed.
Note2: The function test shall be conducted after 4 hours storage at the normal Temperature and humidity after remove from the test chamber.
Note3: Vibration test will be conducted to the product itself without putting it in a container.
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13.Backlight Information Specification
PARAMETER Supply Current Supply Voltage SYMBOL MIN ILED V 264 4.0 － 148.8 ─ － TYP 330 4.2 － 186 573 MAX 420 4.4 8 － － UNIT mA V V TEST CONDITION V=4.2V － － Reverse Voltage VR Luminous Intensity Wave Length Life Time Color
IV λp － CD/M2 ILED=330mA nm Hr. ILED=330mA V≦4.6V 100000 － Yellow Green Note: The LED of B/L is drive by current only, drive voltage is for reference only. drive voltage can make driving current under safety area (current between minimum and maximum).
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