OCULAR GDM12864A User Manual

User’s Guide

GDM12864A

™

LCM

(Liquid Crystal Display Module)

XIAMEN OCULAR LCD DEVICES CO., LTD.
??????????????

South 5F., Guang Xia Bldg. Torch Hi-tech
Develop. Area, Xiamen, China 361006
Tel: [phone] Fax: [phone]

GDM12864A LCM Use’s Guide

Contents

Chapter 1. Introduction to ITM-12864A LCM
1

Features 1
Mechanical Specifications 1
Temperature Characteristics 1
External Dimensions 2
Application Diagram 3
Electro- Optical characteristics 4
Interface Pin Connections 5
Electrical Absolute Maximum Rating (KS0107B) 6
DC Electrical Characteristics (KS0107B) 6
Electrical Absolute Maximum Rating (KS0108B) 7
DC Electrical Characteristics (KS0108B) 7

Chapter 2. Driver IC (KS0107B) Function Description 8

Introduction 8
AC Characteristics 9
Master Mode 9
Slave Mode 10
Functional Description 11
RC Oscillator 11
Timing Generation Circuit 11
Data Shift & Phase Select Control 12

Chapter 3. Driver IC (KS0108B) Function Description 13

Introduction 13
AC Characteristics 13
Operating Principles & Methods 16
Display Control Instruction 19

Chapter 1 Introduction to GDM12864A LCM 1

CHAPTER 1

Introduction to ITM-12864A LCM

ITM-12864A is a dot matrix graphic LCD module which is fabricated by low power COMS
technology. It can display 128*64 dots size LCD panel using a 128*64 bit-mapped Display Data
RAM (DDRAM). It interfaces with an 8-bit microprocessor.

Features

?? Display format: 128*64 dots matrix graphic
?? STN yellow-green mode
?? Easy interface with 8-bit MPU
?? Low power consumption
?? LED back-light
?? Viewing angle: 6 O’clock
?? Driving method : 1/64 duty , 1/6.7 bias
?? LCD driver IC: KS0108B(2 ?)? KS0107B
?? Connector: Zebra

Mechanical Specifications

Item Dimension Unit

Module Size(W*H*T) 93.0*70.0*10.0 mm
Viewing Area(W*H) 72.0*40.0 mm
Number of Dots 128.0*64.0 PCS
Dot Size(W*H) 0.48*0.48 mm
Dot Pitch(W*H) 0.52*0.52 mm
Module Size With B/L 93.0*70.0*15.0 mm

Temperature Characteristics

Parameter Symbol Rating Unit

Operating temperature Topr 0 ~ +50

?

Storage temperature Tstg -20 ~ +70

?

Chapter 1 Introduction to GDM12864A LCM 2

Figure 1. External Dimensions

PIN 1 2 3 4 5 6 7 8 9 10
SIGNAL Vss VDD V0 D/I R/W E DB0 DB1 DB2 DB3
PIN 11 12 13 14 15 16 17 18 19 20
SIGNAL DB4 DB5 DB6 DB7 CS1 CS2 RES VEE A K

*NOTE: 1.All units are mm.

2.Tolerances unless otherwise specified ?0.2.

INTECH LCD MODULE ITM-12864A

Chapter 1 Introduction to GDM12864A LCM 3

Figure 2. Application Diagram

CS2B

DB[0:7]

RESETB

CS1B

S64

S1

CS3

RSERW

12

V3

KS0108B

(Bottom view)

VSS

VSS

VEEV4V5

CLK1

CL2

CLK2

M

FRM

V0

V1

V2

VDD

ADC

VEE

SEG64

DB[0:7]
RESETB

CS1B

CS3

CS2B

RESETB

DB[0:7]

CS2
CS1

E
RW
RS

12

RS

RW

E

SEG1

....

C1C64 CCRR

ADC

VEE

VSS

V3

MPU

VSS

V5

V4V0V2

V1

VDD

S1 S64

KS0108B

(Bottom view)

CLK2

CL2

FRM

CLK1

M

VSS

V4V3V5

V1V0V2

VEE

V4

V5

V2

V3

VDD

V0

V1

FS

DS1
VSS

DS2

MS
PCLK2

VDD
SHL

CL2

CLK2

CLK1

FRM

M

KS0107B

SEG128

LCD panel

(128X64)

SEG65

....

. .

COM64

COM1

*Note

1/64 duty, 1/6.7 bias
VDD>V1>V2>V3>V4>V5>VEE

Chapter 1 Introduction to GDM12864A LCM 4

Electro-Optical characteristics

TN Type (Twisted Nematic )

Item Symbol Min. Typ. Max. Unit Condition Note

?2 -?1

Viewing Angle

f

40 - - deg. Cr = 2.0 1,2

Contrast Ratio Cr - 4 - -

?=20

?

f = 0?

3

Response Time (rise) tR - 110 - ms

?=20

?

f = 0?

4

Response Time (fall) tF - 110 - ms

?=20

?

f = 0?

4

STN Type (Super Twisted Nematic )

Item Symbol Min. Typ. Max. Unit Condition Note

?2 -?1

Viewing Angle

f

70

-90

- +90 deg. Cr = 2.0 1,2

Contrast Ratio Cr - 4 - -

?=20

?

f = 0?

3

Response Time (rise) tR - 110 - ms

?=20

?

f = 0?

4

Response Time (fall) tF - 110 - ms

?=20

?

f = 0?

4

4. Definition of optical response

3. Definition of contrast Cr

2. Definition of viewing angle

¦È

1

&

¦Õ

2

1. Definition of angle ¦È&

¦Õ

¦È

¦È

Y

(¦Õ=18

0¦Ï)Y’

(¦Õ=

0¦Ï)¦È<20¦Ï<

¦È

¦È

20

¦Ï

¦È

2

2.0

C

r

100%

100%

100%

Intensity

Intensity

0%

B

A

Off

Off

On

90%

10%

t

F

t

R

Time

Driving Voltage

Set Point

Cr = ( A / B )

p

Negative : P = -1
Positive : P = +1

Non-

Selected
Dots

Dots

selected

Chapter 1 Introduction to GDM12864A LCM 5

Interface Pin Connections

Pin
No.

Symbol I/O Type Description

1 VSS Supply Ground
2 VDD Supply Power supply
3 V0 Supply

LCD driver supply voltage

4 D/I Data input/output pin of internal shift register

MS SHL DIO1 DIO2

H H Output Output
H L Output Output
L H Input Output
L L Output Input

5 R/W Read or Write

RW Description
H Data appears at DB[7:0] and can be read by the CPU while
E= H CS1B=L,CS2B=L and CS3=H.
L Display data DB[7:0] can be written at falling edge of E
when CS1B=L, CS2B=L and CS3=H.

6 E Enable signal

E Description
H Read data in DB[7:0] appears while E= “High”.
L Display data DB[7:0] is latched at falling edge of E.

7 DB0
8 DB1
9 DB2
10 DB3
11 DB4
12 DB5
13 DB6
14 DB7

I/O Data bus [0~7]

Bi-directional data bus

15
16

CS1
CS2

I Chip selection

When CS1=H,CS2=L, select IC1
When CS1=L,CS2=H, select IC2

17 RESETB I Reset signal.

When RSTB=L

?1?ON/OFF register becomes set by 0.(display off)
?2?display start line register becomes set by 0 (Z-address 0 set, display

from line 0)

?3?After releasing reset , this condition can be changed only by

instruction.

18 VEE Power

VEE is connected by the same voltage.

19 A

Back-light anode

20 K

Back-light cathode