2–10

DLO4135/7135/DLG4137/7137

Top View — DLO4135/DLG4137

Pin Functions — DLO4135/DLG4137

Top View — DLO7135/DLG7137

Pin Functions — DLO7135/DLG7137

Pin

Function

Pin

Function

1LT Lamp

9

D0 Data LSB

2

WR Write

10

D1 Data

3

BL1 Brightness

11

D2 Data

4

BL0 Brightness

12

D3 Data

5

No Pin

13

D4 Data

6

No Pin

14

D5 Data

7CE Chip Enable

15

D6 Data MSB

8

GND

16

Pin

Function

Pin

Function

8

D0 Data Input LSB

2LT Lamp Test

9

D1 Data

3CE Chip Enable

10

D2 Data

4WR Write

11

D3 Data

5

BL1 Brightness

12

D4 Data

6

BL0 Brightness

13

D5 Data

7

GND

14

D6 Data Input MSB

16

15

14

13

12

11

10

9

1

2

3

4

5

6

7

8

1

2

3

4

5

6

7

14

13

12

11

10

9

8

Lamp Test

When the lamp test (LT) is activated, all dots on the display

independent of write (WR) and the settings of the blanking

inputs (BL0, BL1).

This convenient test gives a visual indication that all dots are

functioning properly. Lamp test also may be used as a cursor

function or pointer which does not destroy previously dis-

played characters.

Dimming and Blanking the Display

Loading Data

Loading data into the display is straightforward. Chip enable

(CE) should be present and stable during a write pulse (WR).

Parallel data information should be stable for the minimum

chronization is necessary and each character will continue to

be displayed until it is replaced with another. Multiple dis-

plays may be stacked together with only an additional

decoder IC for chip enable decoding.

Note : Either BL0 or BL1 should be held high for display to light up.

Data Loading Example

X=don’t care, NC=no change

Brightness Level

BL1

BL0

Blank

0

0

0

1

1

0

Full Brightness

1

1

CE WR BL0 BL1 LT

Data Input

D6 D5 D4 D3 D2 D1 D0

H

X

H

X

H

X

X

X

X

X

X

X

NC

X

X

L

L

H

X

X

X

X

X

X

X

Blank

X

X

X

X

L

X

X

X

X

X

X

X

Lamp Test

L

L

H

H

H

H

L

L

L

L

L

H

A

L

L

H

H

H

H

H

H

L

L

H

L

r

L

L

H

H

H

L

H

H

L

L

H

H

3

L

L

H

H

H

L

H

L

H

L

H

H

+