LM240120BCW

LCD Module User Manual

Prepared by:

Checked by:

Approved by:

Cai

Date: 2008-07-22

Date:

Date:

Rev. Descriptions

Release Date

0.1

Preliminary release

2008-07-22

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Document Name: LM240120BCW-Manual-Rev0.1

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LCD Module User Manual

LM240120BCW

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

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

4.2

Display Commands ................................................................................................................................................ 8

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

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1. Basic Specifications

1.1 Display Specifications

1) LCD Display Mode

: FSTN, Positive, Transflective

2) Display Color

: Display Data = “1” : Deep Blue(*1)

: Display Data = “0” : Light Gray (*2)

3) Viewing Angle

: 12H

4) Driving Method

: 1/128 duty, 1/12 bias

5) Backlight

: 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

: 84.0 x 50.0 x 8.7MAX (mm)

(See attached Outline Drawing for details)

1.3 Block Diagram

BLA

Backlight Circuit

LCD Panel

240 × 120Pixels

VDD

VSS

DB0~DB7

UC1608 or equivalent

CS, /RST, D/C, /WR, /RD

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1.4 Terminal Functions

PIN

Pin No.

Name

I/O

Descriptions

1

VSS

Supply Negative power supply,0V

2

VDD

Supply Positive power supply

3

DB7

I/O

8-bit Data bus;

:

:

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

10

when /CS=H,

DB0

D0~D7=High Impedance

11

/RD

Input

/WR=H, /RD=L;

Data or Status read form the LCD module

12

/WR

Input

/WR=L  H, /RD=H;

Data or Instruction latch into the LCD module

13

Input

Register Select

D/C

D/C = H, Transferring the Display Data

D/C = L, Transferring the Control Data

14

Input

Reset signal

/RST

/RST = L, Initialization is executed

/RST = H, Normal running.

15

Input

Chip Select

CS

CS=H, enable access to the LCD module

CS=L, disable access to the LCD module

16

BLA

Supply Positive power for LED backlight

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LCD Module User Manual

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2. Absolute Maximum Ratings

Items

Symbol

Min.

Max.

Unit Condition

Supply Voltage

V DD

-0.3

+3.6

V

V SS = 0V

Input Voltage

V IN

-0.3

V DD +0.3

V

V SS = 0V

Operating Temperature

T OP

-20

+70

 C

No Condensation

Storage Temperature

T ST

-30

+80

 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 =3.0V, T OP =25  C

Items

Symbol

MIN.

TYP.

MAX.

Unit

Condition /

Application Pin

Operating Voltage

V DD

2.7

3.0

3.3

V

VDD

Input High Voltage

V IH

0.8xV DD

-

V DD

V

/RST, CS, D/C,

Input Low Voltage

V IL

V SS

-

0.2xV DD

V

DB0~DB7, /RD, WR

Operating Current

I DD

-

0.7

2.5

mA

VDD

3.2 LED Backlight Circuit Characteristics

VSS=0V, If BLA =85mA, T OP =25  C

Items

Symbol

MIN.

TYP.

MAX.

Unit

Applicable Pin

Forward Voltage

Vf BLA

-

3.3

-

V

BLA

Forward Current

If BLA

-

85

100

mA

BLA

Cautions:

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

BLA

VSS

No. of LED = 5pcs

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3.3 AC Characteristics

3.3.1 8080 Mode System Bus Timing

V SS =0V, V DD =3.0V, T OP =25  C

Item

Symbol

MIN.

TYP.

MAX.

Unit

Address setup time (D/C)

tas80

5

-

-

ns

Address hold time (D/C)

tah80

25

-

-

ns

System cycle time

tcy80

175

-

-

ns

Read pulse width

tpwr80

82

-

-

ns

Write pulse width

tpww80

44

-

-

ns

High pulse width (read)

thpw80

82

-

-

ns

High pulse width (write)

thpw80

44

-

-

ns

Data setup time

tds80

38

-

-

ns

Data hold time

tdh80

25

-

-

ns

Data access time

tacc80

-

-

75

ns

Data output disable time

tod80

9

-

25

ns

Chip select setup time

tcssa80

13

-

-

ns

Chip select setup time

tssd80

13

-

-

ts

Chip select setup time

tcsh80

25

-

-

ns

Note:

*1. Input signal rise/fall time should be less than 15ns .

*2. CL=100pF

*3.All timing is using 20% and 80% of VDD as the reference.

3.3.2 Reset Timing

V SS =0V, V DD =3.0V, T OP =25  C

Item

Symbol

MIN.

TYP.

MAX.

Unit

Reset LOW pulse width

trw

1.3

-

-

μs

Note:

*1.All timing is using 20% and 80% of VDD as the reference.

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4. Function specifications

4.1 Resetting the LCD module

The LCD module should be initialized by using /RST terminal.

While turning on the VDD and VSS power supply, maintain /RST terminal at LOW level. After the

power supply stabilized, release the reset terminal (/RST=HIGH)

4.1.1 Display Memory Map

Page address

data

LCD Display (front view)

D0

0

:

D7

D0

1

:

D7

D0

2

:

D7

D0

:

:

D7

:

D0

240x120 pixels

:

D7

D0

12

:

D7

D0

13

:

D7

D0

14

:

D7

Column Address

00h



EFh

Note:

*1. MUX Rate, MR=1 (1/128duty)

*2. Start Line, SL[5:0]=000000

*3. Fixed Line, FL[3:0]=0000

*4. SEG mirror, MX=1 (mirror X direction)

*5. COM mirror, MY=0 (normal Y direction)

*6. MSB First Mapping, MSF=0

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4.2 Display Commands

The LCD module contains register, which control the operation. These register can be modified by commands.

The following table is a summary of the control registers, their meaning and their default value.

4.2.1 Register Table

Note: Please refer to UC1608 data sheet for details

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4.2.2 Command Table

The following is the list of host command supported.

Note:

Please refer to UC1608 data sheet for details

R/W=0 means it is a write function, R/W=1 means it is a read function

D/C=0 means it is a control data, D/C=1 means it is a display data

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5. Design and Handling Precaution

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

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