gr128x32display

7/28/2019 gr128x32display

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Date: 12-Mar-2000 Sheet of Fil e: C:\ PFWSCH\GR12632.SCH Drawn By:

KS0105 128 x 32 LCD

KS0108 KS0108

DC/DC CONV. and BIAS

64 64

32

CS0DATA/CTRL

CS1

VDDVSSV0VEE

10K - 20K

CONTRAST ADJUST

MODULE

Vdd2

3 V0

Vee18

BLOCK DIAGRAM

128 x 32 Graphic M odule

Pinout:Pin: Function1234567891011121314151617181920

VssVddV0RSR/WEDB0DB1DB2DB3DB4DB5DB6DB7

CS0CS1

/RESETVeeLED+ Vf =4.2V @ 15mALED-

GND. 0V+5VdcCONTRAST ADJUST INPUTH= DATA, L= INSTRUCTIONSH= READ, L= WRITEENABLE PULSEDATA BUS

DATA BUS

LEFT SIDE CHIP SELECT (SEGS 1 - 64)RIGHT SIDE CHIP SELECT (SEGS 65 - 128)

L= RESET-5Vdc LCD BIAS VOLTAGE


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NOTES ON INITIALIZING THE 128X32 MODULE

This module uses two KS0108 Ram enabled segment drivers. The KS0108 has four controlinstructions. They are:

1. Display ON/OFF

2. Set Address ( Y or column address 0 - 63 )3. Set Page Address ( X address 0 - 7 ) each page is 64 bytes4. Set Start Line ( line at top of screen 0 - 63 )

This instruction can also be used to vertically scroll the display.There is also a status read with the msb indicating BUSY status.

The two KS0108 chips are selected by CS_0 or CS_1.A low on CS_0 selects the left half of the Display (segments 1 - 64).A low on CS_1 selects the right half of the display (segments 65 - 128).

The KS0108 Display Data ram stores pixel data for the LCD. It is a 64 Column X 64 Rowaddressable array, as shown on the attached drawings. The 64 rows are divided into 8 pages of 8lines. Data is read from or written to the 8 lines of each page directly through DB0 to DB7. On this

display only four of the eight pages areDisplayed at any time.

To Write to the display you must :set a page addressset a column addressset a start line addressbegin writing data.

The column address increments after a write.A reset does not initialize the display ram.Here is a typical sequence to start the display.(Note: this must be done for both halves of the display)

3EH Display Off 0C0H Set Ram Line 0 to be the initial display line

0B8H Set Page Address (to page 0)40H Set (Y) Address = 0

Write 64 bytes of data (initial display data or zeros to clear display ram)Repeat for each display page until display full

3FH Display ON

Use the display start line command to access the rest of the display ram. IE if the start line is 0 thenpage 0 is at the top of the display. If it is 8 then page 1 is at the top of the display and so on. You canchange the start line in increments of one to implement a smooth scroll.Note that the KS0108 is strictly dot matrix graphic and does not have an internal charactergenerator . Any characters displayed must be sent as bitmap graphic information. However thisallows you to define any size characters that will fit in the 32 lines.

The LED backlight on this module is Vf = 4.2V @ 15mA.


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Date: 13-Mar-2000 Sheet of F il e: C :\ PF WS CH \B G_ GR AF.S CH D ra wn B y:

0 10 20 30 0 10 20 3001234567

B I T

1234567

B I T

0

012

34567

B I T

1234567

B I T

0

01234567

B I T

1234567

B I T

0

01234567

B I T

12

34567

B I T

0

PAGE 0

PAGE 1

PAGE 2

PAGE 3

PAGE 4

PAGE 5

PAGE 6

PAGE 7

ADDRESSES (H)/CS0 /CS1

01111111

01001001 1

0010010 0

1001001 0

1101100 0

0000000 0

0000010 0

0000000 0

1111110

01234567

B I T

1st. KS0108 2nd. KS0108

NOTE:

ONLY FOUR RAM PAGES ARE DISPLAYED AT A TIME

RAM TO DISPLAY MAPPING


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KS0108B

LCD Driver IC

CD-ROM (Edition 4.01) This Data Sheet is subject to change without notice. (C) 1997 SAMSUNG Electronics13 / 18 Page Printed in Korea


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KS0108B

LCD Driver IC



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KS0108B

LCD Driver IC


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