LM16032DFC-0B

LM16032DFC-0B

LCD Module User Manual

Prepared by:

Checked by:

Approved by:

Dong

Date: 2013-06-17

Date:

Rev. Descriptions

Release Date

0.1

Preliminary New release

2004-11-15

0.2

Revise Operate and Storage Temperature Range

2013-06-17

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Document Name: LM16032DFC-0B-Manual-Rev0.2

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LM16032DFC-0B

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

The Parallel interface ............................................................................................................................................. 7

4.3

Adjusting the LCD display contrast ........................................................................................................................ 7

4.4

Display Memory Map ............................................................................................................................................. 8

4.5

Display Control Instructions ................................................................................................................................. 10

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

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1. Basic Specifications

1.1 Display Specifications

1) LCD Display Mode

: STN, Negative, Transflective

2) Display Color

: Display Data = “1” : Light Gray (*1)

: Display Data = “0” : Deep Blue (*2)

3) Viewing Angle

: 6 H

4) Driving Method

: 1/33 duty, 1/5bias

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

: 116.0 x 35.0 x 14.0MAX

(see attached Outline Drawing for details)

1.3 Block Diagram

BLA

LED BL

LCD Panel

Circuit

160 x 32 pixels

VSS

VDD

DB0 - DB7

ST7920

ST7921

RS, R/W, E

equivalent

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1.4 Terminal Functions

No.

Name

I/O

Descriptions

VSS

Power

Negative Power Supply, Ground (0V)

VDD

Power

Positive Power Supply

Power

Power Supply for LCD Driving

Input

RS=H; data read or write

RS=L; Instruction data write or status busy flag read

R/W

Input

Read write control

R/W=H; data or status read

R/W=L; data or command write

Input

E=Enable trigger

DB0

I/O

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

In 4 bit mode, DB3~DB0 could leave open or pull-up

DB7

I/O

BLA

Power

Positive Power for LED backlight

No Connection should leave open

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2. Absolute Maximum Ratings

Items

Symbol

Min.

Max.

Unit

Condition

Supply Voltage

V DD

-0.3

5.5

V SS = 0V

Input Voltage

V IN

-0.3

V DD +0.3

V SS = 0V

LCD Driving Voltage

V EE

-0.3

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 =5.0V, T OP =25  C

Items

Symbol

MIN.

TYP.

MAX.

Unit

Applicable Pin

Operating Voltage

V DD

4.8

5.0

5.2

VDD

LCD Driving Voltage

V 0

4.5

Input High Voltage

V IH1

0.8V DD

V DD

Input Low Voltage

V IL1

V SS

0.4

RS, R/W, E, DB0-DB7

Output High Voltage

V OH1

0.7V DD

V DD

DB0-DB7 (I OH = -0.1mA)

Output Low Voltage

V OL1

V SS

0.6

DB0-DB7 (I OL = 0.1mA)

Operating Current

I DD

1.9

5.0

VDD, VSS

3.2 LED Backlight Circuit Characteristics

V SS =0V, If BLA =60mA, T OP =25  C

Items

Symbol

MIN.

TYP.

MAX.

Unit

Applicable Pin

Forward Voltage

Vf BLA

5.0

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

No. of LED = 3 pcs

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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

tpw

175

E rise time

E fall time

Address set-up time

tas

Address hold time

tah

Data set-up time

tdsw

Data delay time

tddr

125

Data hold time

Host Write Timing Diagram

Host Read Timing Diagram

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4. Function Specifications

4.1 Resetting the LCD module

The LCD module will be initialized, reset, after the power on. It is suggested to check the

Busy Flag to ensure the reset procedure finish.

The initialized status is as follow:

Functions

Initialized Status

ENTER MODE SET

I/D=1

cursor move to right

S=0

DDRAM address counter (AC) plus 1

DISPLAY STATUS

D=0

display = OFF

C=0

cursor = OFF

B=0

cursor position blink = OFF

FUNCTION SET

DL=1

8bit Interface

RE=0

Basic Instruction Set

SCROLL OR RAM ADDR. SELECT

SR=0

CGRAM address access is enabled

REVERSE

R1=0, R0=0 First line normal

EXTENDED FUNCTION SET

G=0

Graphic Display OFF

4.2 The Parallel interface

The parallel interface, 8-bit or 4-bit bus interface, could be selected by FUNCTION SET

instruction DL bit.

In 4-bit bus interface, every 8-bit instruction/data is separated into two parts. First, transfer

the higher 4-bit (D7~D4). Then transfer the lower 4-bit (D3~D0). They are transferred via

DB7~DB4 terminals, where DB3~DB0 are not in used (leave open or pull high).

LCD Module

4.3 Adjusting the LCD display contrast

A Variable-Resistor may be connected to the LCD

module for providing LCD Driving Voltage, V0.

Adjusting the VR will result the change of LCD

display contrast.

The recommended value of VR is 5k Ohm.

VDD

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4.4 Display Memory Map

There are three main memory-areas in the LCD module for display.

- Character Generator RAM (CGRAM)

- Graphic Display RAM (GDRAM)

- Display Data RAM (DDRAM)

4.4.1 Character Generator RAM (CGRAM)

Character Generator RAM is for storing the User-defined Characters (a 16x16 dots font). There are

only two characters could be defined.

The User-defined Character Codes are 0000h and 0002h. They could be called into DDRAM as

normal character.

User-defined

CGRAM

CGRAM data

Character Code

Address

D15 ~ D8

D7 ~ D0

00h

01h

0000h

16 x 16 dot font

0Eh

0Fh

10h

11h

0002h

16 x 16 dot font

1Eh

1Fh

CGRAM Address Map

4.4.2 Graphics Display RAM (GDRAM)

GDRAM is for full graphics display. It could be displayed when G=1 (set by EXTENDED

FUNCTION SET in Extended Instruction Set)

Horizontal Address (X)

00h

01h

08h

09h

D15 ~ D0

00h

01h

160x32 pixels

1Eh

1Fh

GDRAM Address Map

Note:

*1. The mapping is based on Vertical Scroll Displacement Address=0.

*2. Another 160x32 Graphics Display RAM space is not showed. They could be displayed by adjusting the Vertical Scroll

Displacement Address value.

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4.4.3 Display Data RAM (DDRAM)

GB Character Code (16bit, A1A0h~F7FFh) could write into DDRAM for displaying the Simplified

Chinese Character (16x16 dots font). User Characters (16bit, 0000h or 0002h) defined by user that

stored in CGRAM could also be used. The display character should be on grid only.

DDRAM Address (Lower 4bit)

00h

01h

02h

07h

08h

09h

80h

10 x 2 Characters

90h

(16x16 dots font)

DDRAM Address Map with 16x16 dots font

Note:

*1. The mapping is based on Vertical Scroll Displacement Address=0.

*2. Another 10x2(Characters) Display Data RAM space is not showed. They could be displayed by adjusting the Vertical Scroll

Displacement Address value.

Standard ASCII code (8bit, 00h~7Fh) could write into DDRAM for displaying the half-width

Character (8x16 dots font). The display character should be on grid only, and two characters

should be written in each write operation.

DDRAM Address (Lower 4bit)

00h

01h

02h

07h

08h

09h

80h

20 x 2 Characters

90h

(8x16 dots font)

DDRAM Address Map with 8x16 dots font

Note:

*1. The mapping is based on Vertical Scroll Displacement Address=0.

*2. Another 20x2(Characters) Display Data RAM space is not showed. They could be displayed by adjusting the Vertical Scroll

Displacement Address value.

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4.5 Display Control Instructions

4.5.1 Basic Instruction Set

RE=0, basic instruction set

Code

Instructions

Function

Fill DDRAM with “20h”, and set DDRAM address

CLEAR

counter (AC) to “00h”

Set DDRAM address counter (AC) to “00h” and put

HOME

X cursor to origin.

DDRAM content no changed.

Set cursor position and display shift when doing

write or read operation

ENTRY

1 I/D S

I/D=1, cursor move right AC increased by 1

MODE

I/D=0, cursor move left, AC decreased by 1

S=1, toggle the shift of the entire display

(based on I/D defined direction)

D=1, display ON

D=0, display OFF

DISPLAY

D C

C=1, cursor ON

ON/OFF

C=0, cursor OFF

B=1, blink ON

B=0, blink OFF

CURSOR

Cursor position and display shift control.

DISPLAY

1 S/C R/L X

DDRAM content no changed.

CONTROL

DL=1, 8bit interface

FUNCTION

1 DL X RE X

DL=0, 4bit interface

SET

RE=1, extended instruction

RE=0; basic instruction

SET CGRAM

Set CGRAM address to address counter (AC)

1 AC5 AC4 AC3 AC2 AC1 AC0 Make sure that in extended instruction SR=0 (scroll

ADDR

or RAM address selected)

SET DDRAM

0 AC7 AC6 AC5 AC4 AC3 AC2 AC1 AC0

Set DDRAM address to address counter (AC),

ADDR

where AC7 =1, AC6=0

READ BF &

1 BF AC6 AC5 AC4 AC3 AC2 AC1 AC0

Read busy flag (BF) for completion of the internal

ADDR

operation, also read out the value of AC

Write data to internal RAM

(DDRAM, CGRAM,GDRAM)

WRITE RAM 1 0 D7 D6 D5 D4 D3 D2 D1 D0

For 16bit data, write two byte consecutively,

high byte first, then low byte

Read data from internal RAM

READ RAM

1 D7 D6 D5 D4 D3 D2 D1 D0

(DDRAM, CGRAM,GDRAM)

Note:

*1. For the details of the Display Control Instructions, please refer to Sitronix ST7920 series datasheet.

*2. RE is the selection byte of basic and extended instruction set. Each time altering the value of RE, it will remain. Thus, it is not

necessary to set RE every time when using the same group of instruction set

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4.5.2 Extended Instruction Set

RE=1, extended instruction set

Code

Instructions

Function

SCROLL or

SR=1, enable vertical scroll position

RAM ADDR

1 SR

SR=0, enable CGRAM address (basic instruction)

SELECT

Toggle 1 out of 4 line (in DDRAM) of the display to

REVERSE

1 R1 R0

be reversed (initial value is R1 ,R0 = 0, 0

DL=1, 8bit interface

EXTENDED

DL=0, 4bit interface

RE=1, extended instruction

FUNCTION

1 DL X RE G

RE=0; basic instruction

SET

G=1, graphics display ON

G=0, graphics display OFF

SET

Set the address of vertical scroll

SCROLL

1 AC5 AC4 AC3 AC2 AC1 AC0 Make sure extended instruction SR=1, enable

ADDR

vertical scroll position.

SET

1 AC6 AC5 AC4 AC3 AC2 AC1 AC0 Set the GDRAM address to address counter (AC)

Dual byte command should write consecutively

GRAPHICS

First byte set the Vertical address AC6~AC0

RAM ADDR

0 AC3 AC2 AC1 AC0

Second byte set the Horizontal address AC3~AC0

Note:

*1. For the details of the Display Control Instructions, please refer to Sitronix ST7920 series datasheet.

*2. RE is the selection byte of basic and extended instruction set. Each time altering the value of RE, it will remain. Thus, it is not

necessary to set RE every time when using the same group of instruction set

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5. Design and Handling Precaution

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

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