LM19264AFW

LM19264AFW

LCD Module User Manual

Prepared by:

Checked by:

Approved by:

K.C.

Date:

Rev. Descriptions

Release Date

0.1

Preliminary New release

2008-06-06

URL: www.topwaydisplay.com

Document Name: LM19264AFW-Manual-Rev0.1

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TOPWAY

LCD Module User Manual

LM19264AFW

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: LM19264AFW-Manual-Rev0.1

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LCD Module User Manual

LM19264AFW

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” : 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

: 100.0 x 60.0 x 12.5MAX

(see attached Outline Drawing for details)

1.3 Block Diagram

BLA, BLK

LED Backlight Circuit

LCD Panel

192 x 64 pixels

VDD, VSS

Power

S6B0108

V0UT

Booster

Circuit

equivalent

DB0 - DB7

RS, R/W, E, RSTB

CSA

CSB

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LCD Module User Manual

LM19264AFW

1.4 Terminal Functions

No. Name

I/O

Descriptions

DB7

I/O

Data bus;

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

DB0

I/O

Input In read mode

R/W

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

Input RS = H; DB0 – DB7 = Display RAM data

RS = L; DB0 – DB7 = Instruction data

Power LCD Contrast reference

VDD Power Positive Power Supply

VSS Power Negative Power Supply, Ground (0V)

CSA

Input Chip selection, enable access to each section of the LCD module

CSB

Input

CSB CSA

Function

Enable access to the Left Side (64 column)

of the LCD module

Enable access to the Middle Section (64 column)

of the LCD module

Enable access to the Right Side (64 column)

of the LCD module

Disable all the access to LCD module

17 VOUT Output Power Booster output for V0

18 RSTB Input Reset signal

RSTB = L,

Display off

display start line register becomes 0

no command or instruction data could be accepted

RSTB = H,

Normal running

BLA Power Positive Power for LED backlight

BLK Power Negative Power for LED backlight

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LCD Module User Manual

LM19264AFW

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

RS, R/W, E, CSA, CSB,

Input Low Voltage

V IL

0.4

DB0-DB7

Operating Current

I DD

7.5

VDD, VSS

3.2 LED Backlight Circuit Characteristics

BLK=0V, If BLA =102mA, T OP =25  C

Items

Symbol

MIN.

TYP.

MAX.

Unit

Applicable Pin

Forward Voltage

Vf BLA

5.0

BLA

Forward Current

If BLA

102

120

BLA

Cautions:

Exceeding the recommended driving current could cause substantial damage to the backlight and shorten its lifetime.

BLA

BLK

No. of LED = 6pcs

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LCD Module User Manual

LM19264AFW

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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Document Name: LM19264AFW-Manual-Rev0.1

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LCD Module User Manual

LM19264AFW

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.

4.2 Adjusting the LCD display contrast

A Variable-Resistor must be connected to the LCD 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

LCD module

VDD

VOUT

VSS

4.3 Resetting the LCD module

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

on.

When RSTB pull low, the LCD module will:

- Display off

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

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

instructions after making sure that DB4=0 (clear RSTB) 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

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4.4 Display Memory Map

Page (X)

address

data

LCD Display (front view)

192x64 pixels

Column(Y) Address

00h  3Fh

Chip Select

CSA=0, CSB=0

CSA=1, CSB=0

CSA=0, CSB=1

Note:

1) Display star line (Z address) = 0

2) The Display Data store separately in three drivers.

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

LM19264AFW

4.6 Display Control Instructions

Code

Instructions

Function

Controls the display on or off. Internal status and display

Display on/off

0 0 0 0 1 1 1 1 1 1/0 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 counter

Address

Set Page (X)

X address

0 0 1 0 1 1 1

Set the Page address into the X address register

Address

(0-7)

Set Display Start

Z address

0 0 1 1

Indicates the display data RAM displayed at the top of the

Line (Z address)

(0-63)

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. For the details of the Display Control Instructions, please refer to Samsung S6B0108

handbook.

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Document Name: LM19264AFW-Manual-Rev0.1

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LCD Module User Manual

LM19264AFW

5. Design and Handling Precaution

Please refer to "LCD-Module-Design-Handling-Precaution.pdf".

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Document Name: LM19264AFW-Manual-Rev0.1

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