Seiko Instruments user manual AN.No.G1216B1N000-3D0E Display start line Code, DB7 DB0

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AN.No.G1216B1N000-3D0E

(2)Display start line

Code

R/W

D/I

DB7

 

 

 

 

 

 

 

DB0

 

 

 

 

 

 

 

0

0

1

1

 

A

A

A

A

A

 

A

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Upper bits

 

Lower bits

 

 

 

 

 

 

 

 

 

 

 

Sets the display data RAM line address expressed with binary AAAAAA in the display start line register. When displaying the content of the display data RAM, the display data on the line addresses which are set in the register is displayed on the top line on the LCD screen. For address configuration inside the display data, refer to Figure 6. Figure 8 shows display examples of start lines 0 to 3.

COM1

COM1

COM2

COM2

COM3

COM3

COM4

COM4

COM5

COM5

COM6

COM6

COM7

COM7

COM8

COM8

COM9

COM9

COM10

COM10

-

-

-

-

-

-

COM59

COM59

COM60

COM60

COM61

COM61

COM62

COM62

COM63

COM63

COM64

COM64

Display start line=0

Display start line=1

COM1

COM2

COM3

COM4

COM5

COM6

COM7

COM8

COM9

COM10

-

-

-

COM59

COM60

COM61

COM62

COM63

COM64

COM1

COM2

COM3

COM4

COM5

COM6

COM7

COM8

COM9

COM10

-

-

-

COM59

COM60

COM61

COM62

COM63

COM64

Display start line =2

Display start line=3

Figure 8 Relationship Between Display Start Lines and Displays

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Contents AN.No.G1216B1N000-3D0E USER’S ManualCopyright 1993 by Seiko Instruments Inc Contents General Symbol Conditions Min Typ Max Unit Input High +80 Temperature StoragePower supply voltage Voltage25 C Vopr=13.0 Viewing angle Min Typ Max Unit Remark∅ = 25 C Vopr=13.0 Contrast 25 C Vopr=13.0−20 To +70 Storage temp. range AN.No.G1216B1N000-3D0E Definition of response timeNumber of LED LedaChips=20 LedcDB1 DB0DB2 DB3Circuit Configuration CS2 CS1V c, V d, V f FRM CS R/WLSB MSBBusy Page COM2 COM1COM3 COM4Operational Amplifier Bias R2= 9 4 R1= 5 R1 Operating Instructions MPUCS1 CS2 140 450To DB7 Test point RL = 2.4 k = 11 kRise time 200 Reset timeFunction Detailed explanation Display ON/OFF CodeD/I DB7 DB0 AN.No.G1216B1N000-3D0E Display start line CodeDisplay start line=0 Display start line=1 Display start line =2 Display start line=3AN.No.G1216B1N000-3D0E Address page set Code Display Data RAM Address ConfigurationReset =10 k Ω Voltage V opr 13.5 13.0 12.5 11.5 10.5=1.2 k Ω Variable resistor=LED forward voltage =Input voltage power voltageV=Allowable LED forward current a Leda LedcZ80 PIO MPU Connection DiagramD0 to D7 A0 to A7 DB0 to DB7 A0 to A15 Decoder Iorq RST CS1Precautions 11, 12, 17 9, 11, 12, 17, 18, 19LC drive voltage 10, 16, 17Seiko Instruments Inc