LM12896HCW

LM12896HCW

LCD Module User Manual

Prepared by:

Checked by:

Approved by:

Wangxiao

Date: 2025-06-30

Date:

Rev. Descriptions

Edit

Release Date

0.1

Preliminary release

Wangxiao

2025-04-18

0.2

Update 3.1DC Characteristics

Wangxiao

2025-06-30

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Document Name: LM12896HCW-Manual-Rev0.2.doc

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LCD Module User Manual

LM12896HCW

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.............................................................................................................. 10

4.1 Adjusting the Display Contrast......................................................................................................................................10

4.2 Application circuit(Example)......................................................................................................................................... 10

4.3 Resetting the LCD module............................................................................................................................................10

4.4 Power off the LCD Module............................................................................................................................................10

4.5 Refreshing The LCD Module........................................................................................................................................ 10

4.6 Display Memory Map....................................................................................................................................................11

4.7 Display Data RAM (DDRAM)........................................................................................................................................12

4.8 Display Commands.......................................................................................................................................................13

Design and Handling Precaution................................................................................................... 17

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LCD Module User Manual

LM12896HCW

1.Basic Specifications

1.1 Display Specifications

1) LCD Display Mode

: FSTN, Positive, Transflective

2) Display Color

: Display Data = “1” : Dark Gray (*1)

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

3) Viewing Angle

: 6 H

4) Driving Method

: 1/96 duty, 1/10bias

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.

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

1.2 Mechanical Specifications

1) Outline Dimension

: 63.2 x 43.5 x 6.25(mm)(exclude FPC terminal)

(see attached Outline Drawing for details)

1.3 Block Diagram

BLA

Backlight

BLK

LCD Panel

128 x 96 Pixels

VDD,VSS,ESD

DB7~DB4,DB3(SDA)~DB1(SDA),DB0(SCL)

/RST,/WR(R/W),/RD,A0(E),/CS

ST75161 or equivalent

VG,V0,XV0,CA1P,CA1N

VPP,EXTB,IF0,IF1,IF2

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1.4 Terminal Functions

Descriptions

No.

Name

I/O

8080 mode

6800 mode

4-line SPI

3-line SPI

ESD

P Connect to ground to boost ESD

VPP

The programming power supply of the built-in OTP

if no used,leave open

- -

EXTB

When programming OTP, connect EXTB to VSS externally

if no used,leave open

DB7

I/O

DB6

I/O

No used,fix to H by VDD

DB5

I/O

DB4

I/O

8 bit bi-directional data bus

DB3(SDA)

I/O

Serial input/output data,

DB2(SDA)

I/O

DB3(SDA)~DB1(SDA) must

DB1(SDA)

I/O

be connected together

DB0(SCL)

I/O

Serial input clock

Reset signal.

/RST

I /RST = L, internal Initialization is executed

/RST = H, Normal running

WR=L  H,

/RD=H;

R/W = H, E=L;

/WR(R/W)

I Data or Instruction

Data or Status

No used,fix to H by VDD

latch into the LCD

read form the LCD

module

WR=H, /RD=L;

R/W=L,

/RD(E)

Data or Status

E= H  L;

read form the LCD

Data or Instruction No used,fix to H by VDD

module

latch into the LCD

module

I A0 = H, Transferring the Display Data

No used,

A0 = L, Transferring the Control Data

fix to H by VDD

Chip select input pin

/CS

I /CS= “ L ” : This chip is selected and the MPU interface is active

/CS= “ H ” : This chip is not selected and the MPU interface is disabled

These pins select interface operation mode

IF0

IF2 IF1 IF0 Interface Type

H 8080 mode

IF1

L 6800 mode

L 4-line SPI

IF2

L 3-line SPI

VSS

P Negative Power Supply, Ground (0V)

VDD

P Positive Power Supply

CA1N

P DC/DC voltage converter

CA1P

P Connect a capacitor between CA1P and CA1N

XV0

P Negative operating voltage of COM-drivers

P Positive operating voltage of COM-drivers

P VG is the power of SEG-drivers

ESD

P Connect to ground to boost ESD

BLA

P Positive Power for LED backlight

BLK

P Negative Power for LED backlight

Note:

*1.I——Input ， O——Output ， P——Power/Ground.

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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

Operating Temperature

T OP

-40

 C

No Condensation

Storage Temperature

T ST

-40

 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.

Unit Applicable Pin

Operating Voltage

V DD

3.0

3.3

3.6

VDD

Input High Voltage

V IH

0.7V DD

V DD

DB7~DB4,DB3(SDA)~

Input Low Voltage

V IL

V SS

0.3V DD

DB1(SDA),DB0(SCL),

Output High Voltage

V OH

0.8V DD

V DD

/RST,/WR(R/W),

/RD(E),A0,/CS

Output Low Voltage

V OL

V SS

0.2V DD

Operating Current

I DD

mA VDD

3.2 LED Backlight Circuit Characteristics

V SS = 0V, BLA = 3.3V, T OP = 25  C

Items

Symbol

MIN.

TYP.

MAX.

Unit Applicable Pin

Forward Voltage

V BLA

3.3

BLA

Forward Current

I BLA

mA BLA

Cautions:

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

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3.3 AC Characteristics

3.3.1 8080 Interface Characteristics

8080 Interface Timing Diagram

V SS = 0V, V DD = 3.3V, T OP = 25  C

Item

Symbol Condition

MIN.

TYP.

MAX.

Unit

Address Setup Time

t AW8

Address Hold Time

t AH8

System cycle time(WRITE)

t CYC8

208

/WR L pulse width(WRITE)

t CCLW

/WR H pulsewidth(WRITE)

t CCHW

System cycle time (READ)

t CYC8

520

/RD L pulse width (READ)

t CCLR

234

/RD H pulse width (READ)

t CCHR

234

WRITE Data setup time

t DS8

19.5

WRITE Data hold time

t DH8

19.5

READ access time

t ACC8

130

READ Output disable time

t OH8

Note:

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

*2. CL=30pF.

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

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LCD Module User Manual

LM12896HCW

3.3.2 6800 Interface Characteristics

6800 Interface Timing Diagram

V SS = 0V, V DD = 3.3V, T OP = 25  C

Item

Symbol Condition

MIN.

TYP.

MAX.

Unit

Address Setup Time

t AW6

Address Hold Time

t AH6

System cycle time(WRITE)

t CYC6

208

Enable L pulse width(WRITE)

t EWLW

Enable H pulse width(WRITE)

t EWHW

System cycle time (READ)

t CYC6

520

Enable L pulse width (READ)

t EWLR

234

Enable H pulse width (READ)

t EWHR

234

Write data setup time

t DS6

19.5

Write data hold time

t DH6

19.5

Read data access time

t ACC6

130

Read data output disable time

t OH6

Note:

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

*2. CL=30pF.

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

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3.3.3 4-Line SPI MCU Interface Characteristics

4-Line SPI Interface Timing Diagram

V SS = 0V, V DD = 3.3V, T OP = 25  C

Item

Symbol Condition

MIN.

TYP.

MAX.

Unit

Serial clock period

t SCYC

104

SCLK “H” pulse width

t SHW

SCLK “L” pulse width

t SLW

Address setup time

t SAS

Address hold time

t SAH

Data setup time

t SDS

Data hold time

t SDH

/CS-SCLK time

t CSS

/CS-SCLK time

t CSH

/CS “H” pulse width

t CHW

Note:

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

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

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3.3.4 3-Line SPI MCU Interface Characteristics

3-Line SPI Interface Timing Diagram

V SS = 0V, V DD = 3.3V, T OP = 25  C

Item

Symbol Condition

MIN.

TYP.

MAX.

Unit

Serial clock period

t SCYC

104

SCLK “H” pulse width

t SHW

SCLK “L” pulse width

t SLW

Data setup time

t SDS

Data hold time

t SDH

/CS-SCLK time

t CSS

/CS-SCLK time

t CSH

Note:

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

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

3.3.5 Reset Timing

Reset Timing Diagram

V SS =0V, V DD =3.3V, T OP =25  C

Item

Symbol

MIN.

TYP.

MAX.

Unit

Reset time

t R

Reset “L” pulse width

t RW

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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 Application circuit(Example)

Note:

Please refer to the ST75161 data sheet for details

4.3 Resetting the LCD module

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

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

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

4.4 Power off the LCD Module

It recommends that LCD module should enter sleep mode before power off.

4.5 Refreshing The LCD Module

It recommends that the operating modes and display contents should be refreshed periodically to

prevent the effect of unexpected noise.

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4.6 Display Memory Map

Page

Address

Data

LCD Module Top View

128x96

Column Address

00h

7Fh

Internal Display RAM Address

Note:

Display start line = 0,INV = 0.

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4.7 Display Data RAM (DDRAM)

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4.8 Display Commands

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Note ： For Details please refer to ST75161 datasheet.

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Design and Handling Precaution

The LCD panel is made by glass. Any mechanical shock (eg. dropping form high place)

will damage the LCD module.

Do not add excessive force on the surface of the display, which may cause the Display

color change abnormally.

The polarizer on the LCD is easily get scratched. If possible, do not remove the LCD

protective film until the last step of installation.

Never attempt to disassemble or rework the LCD module.

Only Clean the LCD with Isopropyl Alcohol or Ethyl Alcohol. Other solvents (eg. water)

may damage the LCD.

When mounting the LCD module, make sure that it is free form twisting, warping and

distortion.

Ensure to provide enough space (with cushion) between case and LCD panel to

prevent external force adding on it, or it may cause damage to the LCD or degrade the

display result.

Only hold the LCD module by its side. Never hold LCD module by add force on the heat

seal or TAB.

Never add force to component of the LCD module. It may cause invisible damage or

degrade of the reliability.

10.

LCD module could be easily damaged by static electricity. Be careful to maintain an

optimum anti-static work environment to protect the LCD module.

11.

When peeling off the protective film from LCD, static charge may cause abnormal

display pattern. It is normal and will resume to normal in a short while.

12.

Take care and prevent get hurt by the LCD panel sharp edge.

13.

Never operate the LCD module exceed the absolute maximum ratings.

14.

Keep the signal line as short as possible to prevent noisy signal applying to LCD

module.

15.

Never apply signal to the LCD module without power supply.

16.

IC chip (eg. TAB or COG) is sensitive to the light. Strong lighting environment could

possibly cause malfunction. Light sealing structure casing is recommend.

17.

LCD module reliability may be reduced by temperature shock.

18.

When storing the LCD module, avoid exposure to the direct sunlight, high humidity, high

temperature or low temperature. They may damage or degrade the LCD module.

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