EADOG

Page 2

ELECTRONIC ASSEMBLY reserves

the right to change specifications

without prior notice. Printing and

typographical

errors

reserved.

PINOUT

graphics display, is a new member to

ELECTRONIC

ASSEMBLY’s

EA DOG series. It also has pins that

allow it to be mounted quickly and

easily.

LED backlight

(each path )

Forward

voltage

Current

Limiting resistor

(ohm)

typ

max

@3,3 V

@5 V

yellow/green

EA LED78x64-G

1.9 V

80 mA

18

39

amber

EA LED78x64-A

2.0 V

80 mA

18

39

red

EA LED78x64-R

1.9 V

80 mA

18

39

LED backlight

(each path )

Forward

voltage

Current

max.

typ

white

EA LED78x64-W

8.8 V

20 mA

green

EA LED78x64-E

9.0 V

20 mA

blue

EA LED78x64-B

9.1 V

20 mA

LED backlight

(each color)

Forward

voltage

Current

Limiting

resistor

(ohm)

typ

max

@5 V

full color

EA LED78x64-RGB

4 V

60 mA

15

LED-Backlight schematic

Pin Symbol Level Function

Pin Symbol Level Function

1

NC

(A1+: LED backlight)

17

VLCD

-

Power LC Drive

2

NC

(A2+: LED backlight)

18

VB0+

-

Voltage Converter

3

NC

(A3+: LED backlight)

19

VB1+

-

Voltage Converter

4

20

VB1-

-

Voltage Converter

5

21

VB0-

-

Voltage Converter

6

22

VDD

H

Power Supply +2,6..3,3V

connect Pin22 <-> Pin23

7

23

VDD2/3

8

24

VSS2

L

Power Supply 0V (GND)

connect Pin24 <-> Pin25

9

25

VSS

10

26

BM0

H / L

Config Serial Interface

11

27

CD

H / L

L= Command, H= Data

12

28

CS0/A2

L

Chip Select (active low)

13

29

RST

L

Reset (active low)

14

NC

(C1-: LED backlight)

30

D6

H / L

Config Serial Interface

15

NC

(C2-: LED backlight)

31

D3/SDA

H / L

Serial Data

16

NC

(C3-: LED backlight)

32

D0/SCK

H / L

Serial Clock

Application example: EA LED78x64-W, -E, and -B

CONTRAST ADJUSTMENT

The contrast can be set by means of

a command for all the displays in the

EA DOG series. The contrast setting

of the display must be set once by the

software, and is then kept constant

throughout the entire operating temperature range (-20..+70°C), thanks to the integrated temperature

compensation.

LED BACKLIGHT

7 different types are available for individual backlighting:

white, yellow/green, green, blue, red, amber and a full-color

version.

There are 3 separate LED paths available that can be

switched in parallel or in series to suit the system voltage.

To operate the yellow/green (-G), red (-R) and amber (-A)

backlight, an external series resistor can be used to limit

the current. This can be calculated from R=U/I.

To operate the white (-W), green (-E) and blue (-B) backlight,

we recommend a current source (e.g. CAT4238TD) .

The operating life of the yellow/green, red and amber backlights

is 100,000 hours. The white, green and blue backlights we do

provide with long-life LEDs from NICHIA. We recommend that

you dim these or switch them off whenever possible.

Important:

Never connect the backlight LEDs directly to a 5 V/3.3 V

supply as this may immediately destroy the LEDs. Always

use a current limiter. Please note that derating applies at

temperatures exceeding +25°C.