PD2435 Datasheet, PDF (9/11 Pages) OSRAM GmbH – 4-Character 5 x 7 Dot Matrix Alphanumeric Programmable Display™ with Built-in CMOS Control Functions

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
Step 8
Step 9
Step 10
Load enable blinking character into the control
word register. The display should show “STOP”
with a flashing “O”.
Add Another Blinking Character
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
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)
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)
 2001 OSRAM Opto Semiconductors Inc.• San Jose, CA
www.infineon.com/opto • 408-456-4000
OSRAM Opto Semiconductors GmbH & Co. OHG • Regensburg, Germany
www.osram-os.com • [phone]
9
PD2535/6/7, PD3535/6/7, PD4435/6/7
July 5, 2001-14