LM12896FCW

LM12896FCW

LCD Module User Manual

Prepared by:

Checked by:

Approved by:

yaogang

Date: 2019-07-16

Date:

Rev. Descriptions

Release Date

0.1

Prelimiay release

2019-07-16

URL: www.topwaydisplay.com

Document Name: LM12896FCW-Manual-Rev0.1

Page: 1 of 17

TOPWAY

LCD Module User Manual

LM12896FCW

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

1.5

Jumper Functions ................................................................................................................................................... 5

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

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

3.1

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

3.2

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

3.3

8080 Interface ........................................................................................................................................................ 6

3.4

6800 Interface ....................................................................................................................................................... 7

3.5

4-Line SPI MCU Interface ...................................................................................................................................... 8

3.6

3-Line SPI MCU Interface ...................................................................................................................................... 8

3.7

I2C MCU Interface ................................................................................................................................................ 9

3.8

Reset Timing ....................................................................................................................................................... 10

4. Function Specifications ....................................................................................................... 10

4.1

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

4.2

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

4.3

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

4.4

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

4.5

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

4.6

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

4.7

Instructions ........................................................................................................................................................... 13

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

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Document Name: LM12896FCW-Manual-Rev0.1

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LCD Module User Manual

LM12896FCW

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

: 63.8 x 47.8 x 9.8MAX

(see attached Outline Drawing for details)

1.3 Block Diagram

BLA

LED

Backlight Circuit

LCD Panel

128 x 96 pixels

VDD

VSS

/CS,/RST,RS,/WR,/RD,

ST75161 or equivalent

DB0~DB7

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LCD Module User Manual

LM12896FCW

1.4 Terminal Functions

Pin No.

Descriptions

8-bit parallel

8-bit

K1,K2 K3 Name

I/O

8080

parallel

4-pin SPI

3-pin SPI

I2C serial

mode(default)

6800

interface

mode

Chip select input pin.

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

/CS

Input

Connect to

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

VSS

disabled(DB7~DB0] are high impedance).

Reset signal.

/RST

Input /RST = L, internal Initialization is executed.

/RST = H, Normal running.

Input

RS = H, Transferring the Display RAM data

Connect to VDD

RS = L, Transferring the Instruction data

/WR=L  H,

R/W = H,

/RD=H;

E=L;

Data or

/WR

Input

Instruction

Status

latch into the

read form

LCD module

the LCD

module

Not used,

R/W=L,

leave open or pull Hi

/WR=H, /RD=L;

E= H  L;

Data or Status

/RD

Input

Data or

read form the

Instruction

LCD module

latch into

the LCD

module

SCLK-

DB0

(SCLK)

IN(I/

serial input clock (SCL)

SID-

DB1

DB1 ~ DB3 must be connected together

8-bit Data bus;

(I/O)

(SDA).

Three state I/O terminal for SDA_IN, serial input data

5 DB2(SID) SID-

display data or instruction

SDA_OUT, serial data and acknowledge

DB3

OUT

data When /CS=H,

(I/O)

output for the I 2 C interface.

DB0~DB7= High

DB4

I/O

Impedance

Connect to

DB5

I/O

VDD

DB6

Input

Connect to VDD

Connect to

DB7

Input

VDD or VSS

VDD

Power Positive Power Supply

Negative Power Supply,

VSS

Power

Ground (0V)

Positive Power for LED

BLA

Power

backlight

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LCD Module User Manual

LM12896FCW

1.5 Jumper Functions

Jumper Setting

Function

Descriptions

JP11 JP12

JP13

JP14

JP15 JP16

OPEN

8080 mode

Set to 8080 mode (8-bit parallel)-default

OPEN

6800 mode

Set to 6800 interface mode (8-bit parallel)

OPEN

4pin SPI

Set to 4-pin SPI mode (serial)

OPEN

3pin SPI

Set to 3-pin SPI mode (serial)

OPEN

I2C mode

Set I2C serial interface

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

/CS, /RST, RS, /WR(R/W),

Input Low Voltage

V IL

V SS

0.3V DD

/RD(E),DB4-DB7,

DB0(SCLK), DB1~ DB3

(SID)

Output High Voltage

V OH

0.8V DD

V DD

Output Low Voltage

V OL

V SS

0.2V DD

DB0-DB7

Operating Current

I DD

0.89

3.13

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

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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LCD Module User Manual

LM12896FCW

BLA

VSS

NO.of LEDs = 3 pcs

3.3 8080 Interface

8080 Interface Timing Diagram

V SS = 0V, V DD = 3.3V, T OP = 25  C

Item

Symbol

MIN.

TYP.

MAX.

Unit

Address Setup Time

tAW8

Address Hold Time

tAH8

System cycle time(WRITE)

tCYC8

208

/WR L pulse width(WRITE)

tCCLW

/WR H pulsewidth(WRITE)

tCCHW

System cycle time (READ)

tCYC8

520

/RD L pulse width (READ)

tCCLR

234

WRITE Data setup time

tCCHR

234

WRITE Data hold time

tDS8

19.5

Output Disable Time

tDH8

19.5

READ access time

tACC8

130

READ Output disable time

tOH8

note: signal rise time and fall time should less than 15ns.

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LCD Module User Manual

LM12896FCW

3.4 6800 Interface

6800 Interface Timing Diagram

V SS = 0V, V DD = 3.3V, T OP = 25  C

Item

Symbol

MIN.

TYP.

MAX.

Unit

Address Setup Time

tAW6

Address Hold Time

tAH6

System cycle time(WRITE)

tCYC6

208

Enable L pulse width(WRITE)

tEWLW

Enable H pulse width(WRITE)

tEWHW

System cycle time (READ)

tCYC6

520

Enable L pulse width (READ)

tEWLR

234

Enable H pulse width (READ)

tEWHR

234

Write data setup time

tDS6

19.5

Write data hold time

tDH6

19.5

Read data access time

tACC6

130

Read data output disable time

tOH6

note: signal rise time and fall time should less than 15ns.

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LCD Module User Manual

LM12896FCW

3.5 4-Line SPI MCU Interface

4-Line SPI Interface Timing Diagram

V SS = 0V, V DD = 3.3V, T OP = 25  C

Item

Symbol

MIN.

TYP.

MAX.

Unit

Serial clock period

tSCYC

104

SCL “H” pulse width

tSHW

SCL “L” pulse width

tSLW

Address setup time

tSAS

Address hold time

tSAH

Data setup time

tSDS

Data hold time

tSDH

CSB-SCLK time

tCSS

CSB-SCLK time

tCSH

CS “H” pulse width

tCHW

note: signal rise time and fall time should less than 15ns

3.6 3-Line SPI MCU Interface

3-Line SPI Interface Timing Diagram

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LCD Module User Manual

LM12896FCW

V SS = 0V, V DD = 3.3V, T OP = 25  C

Item

Symbol

MIN.

TYP.

MAX.

Unit

Serial clock period

tSCYC

104

SCL “H” pulse width

tSHW

SCL “L” pulse width

tSLW

Data setup time

tSDS

Data hold time

tSDH

CSB-SCL time

tCSS

CSB-SCL time

tCSH

note: signal rise time and fall time should less than 15ns

3.7 I2C MCU Interface

I2C Interface Timing Diagram

V SS = 0V, V DD = 3.3V, T OP = 25  C

Item

Symbol

MIN.

TYP.

MAX.

Unit

SCL clock frequency

fSCL

400

KHZ

SCL clock low period

tLOW

1.69

SCL clock high period

tHIGH

0.78

Data set-up time

tSU;Data

1.3

Data hold time

tHD;Data

0.63

Setup time for a repeated

START condition

tSU;STA

0.78

Start condition hold time

tHD;STA

0.78

Setup time for STOP

condition

tSU;STO

0.78

Bus free time between a

STOP and START

tBUF

1.3

Signal rise time

26+0.1Cb

210

Signal fall time

26+0.1Cb

210

Capacitive load

represented by each bus

400

line

Tolerable spike width on

bus

tSW

note: signal rise time and fall time should less than 15ns

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LCD Module User Manual

LM12896FCW

3.8 Reset Timing

V SS =0V, V DD =3.3V, T OP =25  C

Item

Symbol

MIN.

TYP.

MAX.

Unit

Reset time

Reset “L” pulse width

tRW

Reset Timing Diagram

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 setting /RST terminal at low level after the power supply

stable.

4.3 Power off the LCD Module

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

4.4 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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LCD Module User Manual

LM12896FCW

4.5 Display Memory Map

Page

Address

Data

LCD Module Top View

128x96 pixels

Internal Display RAM Address

Note: Display start line = 0,INV = 0.

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4.6 Display Data RAM (DDRAM)

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4.7 Instructions

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LCD Module User Manual

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LCD Module User Manual

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LCD Module User Manual

LM12896FCW

Design and Handling Precaution

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

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Document Name: LM12896FCW-Manual-Rev0.1

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