OSD2002-2 [ETC]

PLED 20x2 Character Module Specifications; PLED 20X2字符模块规格


型号：	OSD2002-2
厂家：	ETC
描述：	PLED 20x2 Character Module Specifications PLED 20X2字符模块规格
文件：	总15页 (文件大小：308K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

One Stop Displays

310 Genius Drive

Winter Park, FL 32789

407-629-0500

sales@onestopdisplays.net

OSD2002-2

PLED 20x2 Character Module Specifications

PLED 20x2 Character Module OSD2002-2 Specification

1. Features

1. 2 lines of 20 characters of 5x8 (dots)

2. Low power consumption

3. High contrast ratio and wide viewing angle

4. Compatible with LCD 20x2 type

5. Controller is compatible with HD44780

6. 4-bits or 8-bit MPU interface

7. High speed MPU interface:2 MHz(VDD=5V)

8. 80x8 bit Display RAM(80 characters max.)

2. Absolute maximum ratings

Symbol

VDD

Topr

Tstg

Vbt

Parameter

Min Typ Max Unit

Supply voltage for Logic

Operating temperature

Storage temperature

Brightness control voltage

Soldering Temperature

Module power consumption

@Vbt=3V VDD=5V

4.5

-20

-30

5.0

5.5

^oC

260 for 5 seconds

Tsolder

130 mW

Item

Operating

Max.

Storage

Min.

-20^oC 60^oC

Min.

-30^oC

Max.

70^oC

Ambient

Temperature

Humidity

Corrosive gas

40^oC 90%RH 40^oC 90%RH

Not Acceptable Not Acceptable

Electrical Characteristics

3.1 DC Electrical Characteristics

(Ta= -20C to 50C)

Item

Symbol

VDD

VBT

Icc

Condition

Min

4.5

Typ

Max

5.5

Unit

Power supply voltage

Brightness control voltage

Power supply current

High level input voltage

Low level input voltage

Leakage current

0.35

VDD=5V, (Logical only )

0.6

VDD

0.55

Vih

Vil

0.7VDD

-0.3

-1

3.2 AC Electrical Characteristics

(Ta= -20C to 50C)

Write operation

Item

Symbol

Tcyc

Min

500

230

Typ

Max

Unit

Enable Cycle Time

Enable Pulse Width (High level)

Enable Rise/ Fall Time

Address Set-up Time

Address Hold Time

Data Set-up Time

Pweh

tEf, tEr

tAS

tAH

tDSW

Data Hold Time

Read operation

Item

Symbol

Tcyc

Min

500

230

Typ

Max

Unit

Enable Cycle Time

Enable Pulse Width (High level)

Enable Rise/ Fall Time

Address Set-up Time

Address Hold Time

Data Delay Time

Pweh

tEf, tEr

tAS

tAH

tDDR

160

Data Hold Time

3.3 Timing Chart

Write operation

tAS

Pweh

tAH

R/W

tEf

tDSW

tEr

D0~D7

Tcyc

Read operation

tAS

Pweh

tAH

R/W

tEf

tDDR

tEr

D0~D7

Tcyc

3.4 Display Data RAM (DDRAM)

The Display Data RAM (DDRAM) is used to store the Display Data that is represented

as 8-bit character code. The Display Data RAM supports an extended capacity of 80 x

8-bits or 80 characters.

DDRAM

Address (Hex)

00 01 02 03 04 05 …… 22 23 24 25 26 27

……

40 41 42 43 44 45

62 63 64 65 66 67

To illustrate, for 2-line x 20 characters display, the relationship between the DDRAM

address and position of the PLED panel is shown below.

Display 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

Position

DDRAM 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F 10 11 12 13

Address

40 41 42 43 44 45 46 47 48 49 4A 4B 4C 4D 4E 4F 50 51 52 53

For shift left

DDRAM 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F 10 11 12 13 14

Address

41 42 43 44 45 46 47 48 49 4A 4B 4C 4D 4E 4F 50 51 52 53 54

For shift right

DDRAM 27 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F 50 51 52

Address

67 40 41 42 43 44 45 46 47 48 49 4A 4B 4C 4D 4E 50 51 52 53

3.5 Correspondence between character codes and char patterns

Standard Font Table

Optional Cyrillic Font Table

3.6 Instruction set

Instruction

Code

RS R/ D7 D6 D5 D4 D3 D2 D1 D0

Description

Execution

time

Clear entire display. Sets DDRAM

address 0 into address counter

Clear

1.52ms

37us

Display

Entry mode

set

Display

On/Off

control

I/D

Sets cursor move direction and

specifies display shift

Sets entire display (D) On/Off

Sets cursor (C) On/Off

Sets Blinking (B) of cursor position

character

37us

S/C R/L

Moves cursor & shifts display without

changing DDRAM contents

Cursor/displ

ay shift

Function set

37us

Sets interface data length (DL)

Sets number of display lines (N)

Sets character font (F)

ACG ACG ACG ACG ACG ACG Sets CGRAM address.

CGRAM data is sent and received

after this setting.

ADD ADD ADD ADD ADD ADD ADD Sets DDRAM address.

The DDRAM data bus sent and

Set CGRAM

address

37us

Set DDRAM

address

received after this setting

AC AC AC AC AC AC AC Reads busy flag (BF) indicating that

internal operation is being performed

Reads address counter contents

Read busy

flag &

address

Write data

into the

CGRAM or

DDRAM

Read data

into the

0us

Write data

Read data

Write data into the CGRAM or

DDRAM

37us

Read data from the CGRAM or

DDRAM

37us

CGRAM or

DDRAM

DDRAM: Display Data RAM

CGRAM: Character Generator RAM

ACG: Character Generator RAM

Address

ADD: Display Data RAM Address

AC: Address Counter

I/D =1: Increment

I/F=0:Decrement

=1: Display shift on

=1: Display on

=1: Cursor display on

=1: Cursor blink on

S/C =1: Shift display

R/L =1: Shift right

DL =1: 8-bit

S/C=0: Move cursor

R/L=0:Shift left

DL=0:4-bit

=1:Dual line

=1:5x10 dots

N =0:Single line

F =0:5x8 dots

BF =1:Internal operation

BF =0:Ready for instruction

3.7 Initialization via Instruction

8-BIT INTERFACE

The following procedures are followed during the initialization of an 8-bit MPU

Power ON

WAIT FOR MORE THAN 15ms AFTER THE VDD RISES TO 4.5V

RS R/W DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0

BF CANNOT BE CHECKED BEFORE THIS

INSTRUCTION.

FUNCTION SET (INTERFACE IS 8 BITS

LONG)

WAIT FOR MORE THAN 4.1ms

RS R/W DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0

BF CANNOT BE CHECKED BEFORE THIS

INSTRUCTION.

FUNCTION SET (INTERFACE IS 8 BITS

LONG)

WAIT FOR MORE THAN 100 us

RS R/W DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0

BF CANNOT BE CHECKED BEFORE THIS

INSTRUCTION.

FUNCTION SET (INTERFACE IS 8 BITS

LONG)

BF CAN BE CHECKED AFTER THE

FOLLOWING INSTRUCTIONS. WHEN BF IS

NOT CHECKED, THE WAITING TIME

BETWEEN THE INSTRUCTIONS IS

LONGER THAN THE EXECUTION TIME OF

THE INSTRUCTION

RS R/W DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0

END OF INITIALIZATION

FUNCTION SET (INTERFACE IS 8 BITS

LONG) SPECIFY THE NUMBER OF

DISPLAY LINES AND CHARACTER FONT)

THE NUMBER OF CHARACTER LINES AND

CHARACTER FONT CANNOT BE

CHANGED AFTER THIS POINT.

DISPLAY OFF

I/D

END OF INITIALIZATION

DISPLAY CLEAR

ENTRY MODE

4-BIT INTERFACE

The following procedures are followed during the initialization of a 4-bit MPU

Power ON

WAIT FOR MORE THAN 15ms AFTER

THE VDD RISES TO 4.5V

RS R/W DB7 DB6 DB5 DB4

BF CANNOT BE CHECKED BEFORE THIS INSTRUCTION.

FUNCTION SET (INTERFACE IS 8 BITS LONG.)

WAIT FOR MORE THAN 4.1ms

RS R/W DB7 DB6 DB5 DB4

BF CANNOT BE CHECKED BEFORE THIS INSTRUCTION.

FUNCTION SET (INTERFACE IS 8 BITS LONG.)

WAIT FOR MORE THAN 100 us

RS R/W DB7 DB6 DB5 DB4

BF CANNOT BE CHECKED BEFORE THIS INSTRUCTION.

FUNCTION SET (INTERFACE IS 8 BITS LONG.)

RS R/W DB7 DB6 DB5 DB4

BF CAN BE CHECKED AFTER THE FOLLOWING INSTRUCTIONS.

WHEN THE BF IS NOT CHECKED, THE WAITING TIME BETWEEN

THE INSTRUCTIONS IS LONGER THAN THE TIME IT TAKES FOR

THE INSTRUCTION TO BE EXECUTED.

FUNCTION SET (SET INTERFACE IS 4 BIT LONG)

INTERFACE IS 8 BITS LONG

FUNCTION SET (INTERFACE IS 4 BIT LONG. SPECIFY THE

NUMBEROF DISPLAY LINES AND CHARACTER FONT).

THE NUMBER OF DISPLAY LINES AND CHARACTER FONT

CANNOT BE CHANGED AFTER THIS POINT.

DISPLAY OFF

I/D

DISPLAY CLEAR

END OF INITIALIZATION

END OF INITIALIZATION ENTRY MODE SET

3.8 Block Diagram

VDD

VSS

VBT

PLED PANEL

20Char x 2Line

Controller

Driver

R/W

D0~D7

Driver

Interface Pin Function

Symbol I/O

No.

Function

VSS

VDD

VBT

Ground

Power supply for logic

Brightness adjustment

H: Data

L: Instruction code

H: Read

L: Write

R/W

HꢀL: Enable

Data bus

Physical specifications

6.1 Mechanical specifications

NO.

Item

Active display area

Viewing area

Module dimension

Dot size

Specification

73.45x11.4

79.0x17.0

113.0x41.4x9.6

0.5x0.65

Unit

Weight

6.2 Drawing

Optical specifications

Item

Response time Rise

Fall

Contrast ratio

Viewing angle Top

Condition Min. Typ. Max. Unit

10 us

100

100 lux

deg

Bottom

Left

right

deg

Brightness

Color

With

polarizer

50 nits

YG¹

Note 1. YG.= yellow green

Reliability test items

Test items

1 High temperature storage 70 ^oC , 240 hrs

Conditions

NO.

2 Low temperature storage -30 ^oC,240 hrs

3 High temperature

operation

4 Low temperature

operation

60 ^oC,240 hrs

-20 ^oC, 240 hrs

5 High temperature and

high humidity storage test

6 Thermal shock test

40^oC, 90% RH, 240 hrs

-20 ^oC → 60 ^oC

20 cycles

Application Note

(1) Ref. Circuit

(2) Ref. Programming

'---------------------------------------------------------------------------------

'It is an OSD2002-2 pattern program and shows A,B,C….on module.

'Here use BASCOM-AVR compile.

'---------------------------------------------------------------------------------

' Project name

' file name

' MCU

20x2 character module

demo2002.bas

AVR AT90S8515

8MHz

' Xtal

' Panel I/F

' Writer

' Date

RS, RW, Enable, BTV

Cheng-Nan Yeh

Dec.26, 2002 rev:A

'-----------------------------------------------

' DB0=PA0: DB1=PA1: DB2=PA2: DB3=PA3

' DB4=PA4: DB5=PA5: DB6=PA6: DB7=PA7

' RS=PB2: RW=PB1: Enable=PB0

'-----------------------------------------------

'-------------initial setting

$regfile = "8515DEF.DAT"

Config Porta = Output

Config Portb = Output

Dim J As Integer , Cara As Byte , I As Byte

Dim Command_diable As Byte, Command_enable As Byte

Dim Command_write_data As Byte , Command_clear_display As Byte

Dim Command_move_right As Byte , Command_display_on As Byte

Dim Command_line2_char5x7 As Byte , Command_ddram_&H00 As Byte

Dim Command_ddram_&H40 As Byte , Write_char As Byte

'---------

Command_diable = &H00

Command_enable = &H01

Command_clear_display = &H01

Command_move_right = &H1D

Command_display_on = &H0C

Command_line2_char5x7 = &H38

Command_ddram_&H00 = &H80

Command_ddram_&H40 = &HC0

Command_write_data = &H05

Write_char = &H40

'---------

C = 1

I = 0

'-------------clear module display and cursor back home

Portb = Command_enable

Porta = Command_clear_display

Waitus 500

Portb = Command_diable

'-------------setting S/C, R/L, I/D, S

Portb = Command_enable

Porta = Command_move_right

Waitus 500

Portb = Command_diable

'--------------display on / off

Portb = Command_enable

Porta = Command_display_on

Waitus 500

'RS=0, RW=0, Enable=1

'wait 500uS for MCU internal delay time

'You need to set PB0=0 after PB0=1 for MCU.

'S/C=1 ,R/L=1 ,I/D=0, S=1

'D=1, C=0, B=0

Portb = Command_diable

'--------------setting 5x7 Char. 2-Line

Portb = Command_enable

Porta = Command_line2_char5x7

Waitus 500

'DL=1, N=1, F=0

Portb = Command_diable

'-----------------------------------------------

''--------fill in any data to module

''--------------setting DDRAM address &H00

For J = 1 To 20 Step 1

Portb = Command_enable

Porta = Command_ddram_&H00 + I

Waitms 10

'set address is &H00

and next one

Portb = Command_diable

'-------write data up

Portb = Command_write_data

Porta = Write_char + C

Waitms 10

'write Char. is "A" and next one.

Portb = Command_diable

Cara = Cara + 1

'--------------setting DDRAM address &H40

Portb = Command_enable

Porta = Command_ddram_&H40 + I

Waitms 10

'set address is &H40

and next one

Portb = Command_diable

'-------write data down

Portb = Command_write_data

Porta = Write_char + C

Waitms 10

'write Char. is "B" and next one.

Portb = Command_diable

'---------

C = C + 1

I = I + 1

If I = 20 Then I = 0

'if DDRAM address is end then come back &H00.

If C = 40 Then C = 0

Next J

'---------------end program

End

Download free BASCOM-AVR DEMO compiler from http://www.mcselec.com/

10 Precaution in Design

(1) Please do not put mechanical stress on the module. Mechanical stress will cause

damage to the metal, plastic, and PLED panel.

(2) The polarizer is easily scratched and should be carefully handled. Please do not touch

the polarizer with hard materials, such as tweezers, pencil lead and glass. Please do not

touch it by.

(3) This module is easily damaged by static discharge, please be cautious of static electricity

and insure human body grounding.

(4) The Half-Brightness Decay Life will be longer than 10K hours when the module is

operated at room temp.

OSD2002-2 [ETC]

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