PD243X, PD353X, PD443X

2006-01-23

11

How to Load Information Into the Display

Information loaded into the display can be either ASCII data or

Control Word data. The following procedure (see also Typical

Loading Sequence) will demonstrate a typical loading sequence

and the resulting visual display. The word STOP is used in all of

the following examples.

Set Brightness

Step 1

Set the brightness level of the entire display to

your preference (example: 100%)

Load Four Characters

Step 2

Load an “S” in the left hand digit.

Step 3

Load a “T” in the next digit.

Step 4

Load an “O” in the next digit.

Step 5

Load a “P” in the right hand digit.

If you loaded the information correctly, the display

now should show the word “STOP.”

Blink a Single Character

Step 6

Into the digit, second from the right, load the hex

code “CF,” which is the code for an “O” with the

D7 bit added as a control bit.

Note:

The “O” is the only digit which has the control bit

(D7) added to normal ASCII data.

Step 7

Load enable blinking character into the control

word register. The display should show “STOP”

with a flashing “O”.

Add Another Blinking Character

Step 8

Into the left hand digit, load the hex code “D3”

which gives an “S” with the D7 bit added as a

control bit. The display should show “STOP”

with flashing “O” and a flashing “S.”

Alternate Character/Cursor Enable

Step 9

Load enable alternate character/cursor into the

control word register. The display now should

show “STOP” with the “O” and the “S” alternating

between the letter and cursor (all dots lit).

Initiate Four Character Blinking

(Regardless of Control Bit setting)

Step 10

Load enable display blinking. The display now

should show the entire word “STOP” blinking.

Typical Loading Sequence

CEO

CE1

RD

WR

A2

A1

A0

D7

D6

D5

D4

D3

D2

D1

D0

Display

1.

L

H

H

L

L

X

X

0

0

0

0

0

0

1

1

2.

L

H

H

L

H

H

H

0

1

0

1

0

0

1

1

S

3.

L

H

H

L

H

H

L

0

1

0

1

0

1

0

0

ST

4.

L

H

H

L

H

L

H

0

1

0

0

1

1

1

1

STO

5.

L

H

H

L

H

L

L

0

1

0

1

0

0

0

0

STOP

6.

L

H

H

L

H

L

H

1

1

0

0

1

1

1

1

STOP

7.

L

H

H

L

L

X

X

0

0

0

1

0

1

1

1

STO*P

8.

L

H

H

L

H

H

H

1

1

0

1

0

0

1

1

S*TO*P

9.

L

H

H

L

L

X

X

0

0

0

1

1

1

1

1

S†TO†P

10.

L

H

H

L

L

X

X

0

0

1

0

0

0

1

1

S*T*O*P*

* Blinking character

† Character alternating with cursor (all dots lit)