LM240120HFW

LM240120HFW

LCD Module User Manual

Prepared by:

Checked by:

Approved by:

Wei

Date: 2019-06-18

Date:

Rev. Descriptions

Release Date

0.1

Preliminary release

2013-01-03

0.2

Update 1.4 Terminal Functions

2019-06-18

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Document Name: LM240120HFW-Manual-Rev0.2

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LCD Module User Manual

LM240120HFW

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 ......................................................................................................... 9

4.1

Adjusting the Display Contrast ............................................................................................................................... 9

4.2

Resetting the LCD module ..................................................................................................................................... 9

4.3

Display Commands .............................................................................................................................................. 10

5. Design and Handling Precaution ........................................................................................ 12

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1. Basic Specifications

1.1 Display Specifications

1) LCD Display Mode

: STN-BLUE, Negative, Transmissive

2) Display Color

: Display Data = “1” : Light Gray(*1)

: Display Data = “0” : Dark Blue (*2)

3) Viewing Angle

: 12H

4) Driving Method

: 1/120 duty, 1/11 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

*3. Fine Contrast adjustment function is necessary in the application design for optimal display result

1.2 Mechanical Specifications

1) Outline Dimension

: 79.0 x 42.3 x 8.2MAX (mm)

(See attached Outline Drawing for details)

1.3 Block Diagram

BLA

Backlight Circuit

UC1618 or equivalent

VDD

LCD Panel

VSS

DB0~DB7

240 × 120Pixels

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

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1.4 Terminal Functions

Descriptions

Pin No.

Name

I/O

8080 mode

6800 mode 4-Wire SPI 3-Wire SPI

VSS

Supply

Negative power supply,0V

VDD

Supply

Positive power supply

DB7

I/O

8-bit Data bus;

DB6

Three state I/O terminal for display data

Connect to VSS

DB5

or instruction data when

DB4

/CS=H,DB0~DB7=High Impedance

DB3

(SDA)

Serial data input

DB2

Connect to VSS

DB1

DB0

(SCK)

Serial clock input

/RD

Input

/WR=H, /RD=L;

R/W=H,E=H;

(E)

Data or Status read

Data or Status

Connect to VSS

form the LCD module read form the

Input

/WR=L  H, /RD=H;

LCD module

Data or Instruction

R/W=L,E=H → L;

/WR

latch into the LCD

(R/D)

Data or Status

Connect to VSS

module

latch into the

LCD module

Input

Connect to VSS

D/C

D/C = H, Transferring the Display Data

D/C = L, Transferring the Control Data

Input

Reset signal

/RST

/RST = L, Initialization is executed

/RST = H, Normal running.

Input

Chip Select

CS=H, enable access to the LCD module

CS=L, disable access to the LCD module

BLA

Supply

Positive power for LED backlight

Note:

1. About lnterface setting ,please refer to UC1618 datasheet for more detail.

lnterface setting:

interface selection is available by the jumper on the back side of the lcd module.

JP1

JP2

JP3

JP4

Interface mode

OPEN

8080 Mode(default)

OPEN

6800 Mode

OPEN

4 Wire SPI

OPEN

3 Wire SPI

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2. Absolute Maximum Ratings

Items

Symbol

Min.

Max.

Unit Condition

Supply Voltage

V DD

-0.3

+4.0

V SS = 0V

Input Voltage

V IN

-0.3

V DD +0.3

V SS = 0V

Operating Temperature

T OP

-30

+70

 C

No Condensation

Storage Temperature

T ST

-40

+85

 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 =3.3V, T OP =25  C

Items

Symbol

MIN.

TYP.

MAX.

Un Condition /

it Application Pin

Operating Voltage

V DD

3.3

3.6

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

0.8

2.5

mA VDD

3.2 LED Backlight Circuit Characteristics

VSS=0V, If BLA =68mA, T OP =25  C

Items

Symbol

MIN.

TYP.

MAX.

Unit

Applicable Pin

Forward Voltage

Vf BLA

3.3

BLA

Forward Current

If BLA

BLA

Cautions:

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

BLA

VSS

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3.3 AC Characteristics

3.3.1 8080 Mode System Bus Timing

V SS =0V, V DD =3.3V, T OP =25  C

Item

Symbol

MIN.

TYP.

MAX.

Unit

Address setup time (D/C)

tas80

Address hold time (D/C)

tah80

System cycle time

tcy80

280

Read pulse width

tpwr80

Write pulse width

tpww80

High pulse width (read)

thpw80

100

High pulse width (write)

thpw80

Data setup time

tds80

Data hold time

tdh80

Data access time

tacc80

Data output disable time

tod80

131

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 6800 Mode System Bus Timing

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V SS =0V, V DD =3.3V, T OP =25  C

Item

Symbol

MIN.

TYP.

MAX.

Unit

Address setup time (D/C)

Tas68

Address hold time (D/C)

Tah68

System cycle time

Tcy68

280

Read pulse width

tpwr68

100

Write pulse width

Tpww68

High pulse width (read)

Thpw68

100

High pulse width (write)

Thpw68

Data setup time

Tds68

Data hold time

Tdh68

Data access time

Tacc68

150

Data output disable time

tod68

120

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.

3.3.3 4-Wire SPI Timing

V SS =0V, V DD =3.3V, T OP =25  C

Item

Symbol

MIN.

TYP.

MAX.

Unit

Address setup time (D/C)

Tas8

Address hold time (D/C)

Tah8

Chip select setup time

Tcssa8

Chip select hold time

Tcshs8

System cycle time

Tcy8

250

Data setup time

tdss8

Data hold time

Tdhs8

Read access time

Taccs8

110

Output disable time

Tods8

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.

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3.3.4 3-Wire SPI Timing

V SS =0V, V DD =3.3V, T OP =25  C

Item

Symbol

MIN.

TYP.

MAX.

Unit

Address setup time (D/C)

Tas9

Address hold time (D/C)

Tah9

System cycle time

Tcy9

250

Data setup time

Tdss9

Data hold time

Tdhs9

Read access time

Taccs9

110

Output disable time

Tods9

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.

3.3.5 Reset Timing

V SS =0V, V DD =3.3V, 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 Adjusting the Display Contrast

- This LCD module equipped with latest digital contrast adjustment function.

- Its display contrast could be adjusted by MCU command. (please see the command tables for

details)

- It is recommended to provide a contrast adjustment interface for end-user, where the best

display result could meet the individual preference in mass production.

4.2 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)

4.2.1 Display Memory Map

Page address

data

LCD Display (front view)

DB0

DB7

DB0

DB7

DB0

DB7

DB0

DB7

DB0

240x120 pixels

DB7

DB0

DB7

DB0

DB7

DB0

DB7

Column Address

0Fh



FEh

Note:

*1. MUX Rate, duty =1/120,Bias=1/11;

*2. SEG mirror, MX=0 (normal X direction)

*3. COM mirror, MY=1 (mirror Y direction)

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4.3 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.

4.3.1 Register Table

Note: Please refer to UC1618 data sheet for details

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4.3.2 Command Table

The following is the list of host command supported.

Note:

Please refer to UC1618 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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