LM19264K-4

LM19264K-4

LCD Module User Manual

Prepared by:

Checked by:

Approved by:

Liqin

Date: 2009-01-05

Date:

Rev. Descriptions

Release Date

0.1

New release

2009-01-05

URL: www.topwaydisplay.com

Document Name: LM19264K-4-Manual-Rev0.1

Page: 1 of 10

TOPWAY

LCD Module User Manual

LM19264K-4

Table of Content

1. Basic Specifications .............................................................................................................. 3

1.1

Display Specifications ............................................................................................................................................ 3

1.2

Mechanical Specifications ...................................................................................................................................... 3

1.3

Block Diagram ........................................................................................................................................................ 3

1.4

Terminal Functions ................................................................................................................................................. 4

2. Absolute Maximum Ratings .................................................................................................. 5

3. Electrical Characteristics ...................................................................................................... 5

3.1

DC Characteristics ................................................................................................................................................. 5

3.2

LED Backlight Circuit Characteristics ..................................................................................................................... 5

3.3

AC Characteristics ................................................................................................................................................. 6

4. Function Specifications ......................................................................................................... 7

4.1

Basic Setting .......................................................................................................................................................... 7

4.2

Adjusting the LCD display contrast ........................................................................................................................ 7

4.3

Resetting the LCD module ..................................................................................................................................... 7

4.4

Display Memory Map ............................................................................................................................................. 8

4.5

Internal Registers ................................................................................................................................................... 8

4.6

Display Control Instructions ................................................................................................................................... 9

5. Design and Handling Precaution ........................................................................................ 10

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Document Name: LM19264K-4-Manual-Rev0.1

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LCD Module User Manual

LM19264K-4

1. Basic Specifications

1.1 Display Specifications

1) LCD Display Mode

: STN, Negative, Transmissive

2) Display Color

: Display Data = “1” : Light Gray (*1)

: Display Data = “0” : Deep Blue (*2)

3) Viewing Angle

: 6 H

4) Driving Method

: 1/64 duty, 1/ 9bias

5) Back Light

: White LED backlight

Note:

*1. Color tone may slightly change by Temperature and Driving Condition.

*2. The Color is defined as the inactive / background color

1.2 Mechanical Specifications

1) Outline Dimension

: 130.0 x 65.0 x 14.1MAX

(see attached Outline Drawing for details)

1.3 Block Diagram

COM1

LCD Panel

192 x 64 pixels

COM64

BLA

LED

Backlight

Circuit

VDD

LCD Power

VSS

Booster

S6B0108

V0UT

Circuit

equivalent

DB0 - DB7

R/S, R/W, E, /RST

/CS1

/CS2

/CS3

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LCD Module User Manual

LM19264K-4

1.4 Terminal Functions

No. Name

I/O

Descriptions

VSS

Power Negative Power Supply, Ground (0V)

VDD

Power Positive Power Supply

Power LCD Contrast reference

R/S

Input

R/S = H; DB0 – DB7 = Display RAM data

R/S = L; DB0 – DB7 = Instruction data

R/W

Input

In read mode

Input

R/W = H;

Data read form the LCD module,

data appears at DB0 – DB7 and can be read by the host

while, E = H and the device is being selected

In write mode

R/W = L;

Data write to the LCD module,

data appears at DB0 – DB7 will be written into the LCD module

at E = H  L and device is being selected

DB0

I/O

Data bus;

Three state I/O terminal for display data or instruction data

DB7

/CS1

Input

Chip selection, enable access to left section of the LCD module (*1)

/RST Input

Reset signal

/RST = L,

Display off

display start line register becomes 0

no command or instruction data could be accepted

/RST = H,

Normal running

/CS2

Input

Chip selection, enable access to middle section of the LCD module (*1)

/CS3

Input

Chip selection, enable access to right section of the LCD module (*1)

VOUT Output Power Booster output for V0

BLA

Power Positive Power for LED backlight

Note:

*1. Display or instruction data could write into the LCD module’s driver/controllers individually or at the

same time.

Only read display or instruction data form one of the driver/controller in the LCD module at a time,

otherwise unexpected data collision may occur.

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LCD Module User Manual

LM19264K-4

2. Absolute Maximum Ratings

Items

Symbol

Min.

Max.

Unit

Condition

Supply Voltage

V DD

7.0

V SS = 0V

Operating Temperature

T OP

-20

 C

No Condensation

Storage Temperature

T ST

-30

 C

No Condensation

Cautions:

Any Stresses exceeding the Absolute Maximum Ratings may cause substantial damage to the device.

Functional operation of this device at other conditions beyond those listed in the specification is not implied

and prolonged exposure to extreme conditions may affect device reliability.

3. Electrical Characteristics

3.1 DC Characteristics

V SS =0V, V DD =5V, T OP =25  C

Items

Symbol

MIN.

TYP.

MAX.

Unit

Applicable Pin

Operating Voltage

V DD

4.8

5.0

5.2

VDD

Input High Voltage

V IH

3.5

V DD

R/S, R/W, E, /CS1, /CS2,

Input Low Voltage

V IL

0.4

/CS3, DB0-DB7

Operating Current

I DD

7.5

VDD, VSS

3.2 LED Backlight Circuit Characteristics

V SS =0V, If BLA =160mA, T OP =25  C

Items

Symbol

MIN.

TYP.

MAX.

Unit

Applicable Pin

Forward Voltage

Vf BLA

5.0

BLA

Forward Current

If BLA

160

200

BLA

VSS

No. of LED = 8

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LCD Module User Manual

LM19264K-4

3.3 AC Characteristics

V SS =0V, V DD =5V, T OP =25  C

Item

Symbol

MIN.

TYP.

MAX.

Unit

E cycle time

1500

E high level width

twh

700

E low level width

twl

700

E rise time

E fall time

Address set-up time

tasu

210

Address hold time

tah

Data set-up time

tdsu

300

Data delay time

480

Data hold time (write)

tdhw

Data hold time (read)

tdhr

Host Write Timing Diagram

Host Read Timing Diagram

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LCD Module User Manual

LM19264K-4

4. Function Specifications

4.1 Basic Setting

To drive the LCD module correctly and provide normally display, please use the following setting

Display start line (Z address)= 0

LCD Display = on

Note:

These setting/commands should issue to both controllers while start up.

See the Display Control Instructions section for details.

LCD Module

4.2 Adjusting the LCD display contrast

A Variable-Resistor must be connected to the LCD

VDD

module for providing a reference to V0. Adjusting the VR

will result the change of LCD display contrast.

The recommended value of VR is 25k to 50k

VOUT

4.3 Resetting the LCD module

The LCD module should be initialized by setting /RST terminal at low level when turning the power

on.

When /RST pull low, the LCD module will:

- Display off

- Display start line register becomes 0. (Z-address=0)

While /RST is low, no instruction can be accepted except status read. Therefore, execute other

instructions after making sure that DB4=0 (clear /RST) and DB7=0 (ready) by status read

instruction. The conditions of power supply at initial power up are as follow:

Item

Symbol

MIN.

TYP.

MAX.

Unit

Reset time

trs

2.0

Rise time

150

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LCD Module User Manual

LM19264K-4

4.4 Display Memory Map

Page (X)

data

LCD Display (front view)

address

192x64 pixels

Column(Y) Address

00h  3Fh

Driver (accessed by)

/CS1

/CS2

/CS3

Note:

1) Display star line (Z address) = 0

2) The Display Data store separately in three drivers.

3) The Display Data for the left section could be accessed by /CS1.

The Display Data for the middle section could be accessed by /CS2.

The Display Data for the right section could be accessed by /CS3.

4.5 Internal Registers

There are three registers in each section of LCD module. Each of them could be controlled

independently.

Page (X) Address Register

X address register designates pages of the internal display data RAM. Count function is not

available. The address should set by instruction.

Column (Y) Address Counter

Y address counter designates address of the internal display data RAM. It could be set by

instruction and is increased by 1 automatically by read or write display data operations.

Display Start Line (Z) Register

Z address register indicates of display data RAM to LCD top line. It may be used for scrolling the

display pattern on the LCD.

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LCD Module User Manual

LM19264K-4

4.6 Display Control Instructions

Code

Function

Note

Instructions

Controls the display on or off. Internal status and

Display on/off

0 0 0 0 1 1 1 1 1 1/0 display data in RAM is not affected

0=off, 1=on

Set Column (Y)

0 0 0 1

Y address (0-63)

Set the Column address into the Y address

Address

counter

Set Page (X)

X address

0 0 1 0 1 1 1

Address

(0-7)

Set the Page address into the X address register *2

Set Display Start

Z address

0 0 1 1

Indicates the display data RAM displayed at the

Line (Z address)

(0-63)

top of the screen

Read status

Busy=L, Driver ready; Busy=H, Driver busy

Status Read

0 1

0 0 0 0

on/off=L, Display is on; on/off=H, Display is off

Reset=L, Normal Running; Reset=H, reset

Write display data into display data RAM,

Write Display Data 1 0

Write data

After writing instruction, Y address counter

increased by 1 automatically

Read Display Data 1 1

Read data

Read display data form the display data RAM

Note:

*1. Only one section (driver) could be read at the same time.

i.e. only the following setting is valid for the operation:

/CS1=0, /CS2=1, /CS3=1

is valid

/CS1=1, /CS2=0, /CS3=1

is valid

/CS1=1, /CS2=1, /CS3=0

is valid

*2. Instruction could be write into both drivers at the same time.

*3. For the details of the Display Control Instructions, please refer to S6B0108 datasheet.

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LCD Module User Manual

LM19264K-4

5. Design and Handling Precaution

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Document Name: LM19264K-4-Manual-Rev0.1

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