Applying the DLX2416
Intelligent Display
®
Device
Appnote 14
This application note is intended to serve as a design and appli-
cation guide for the DLX2416 alphanumeric Intelligent Displays.
The information presented covers device electrical description
and operation, considerations for general circuit design, and
interfacing the DLX2416 to microprocessors. Refer to the spe-
cific data sheet and other Infineon / OSRAM Appnotes for more
details.
Electrical & Mechanical Description
The internal electronics in these Intelligent Displays eliminates
all the traditional difficulties of using multi-digit light emitting
displays (segment decoding, drivers, and multiplexing). The
Figure 1. Block diagram–DLX2416
Dis play
R ow s 0 t o 6
BL
3
2
1
0
Colu mns 0 to 19
R o w Co nt ro l Log ic
& R ow Driv ers
Intelligent Display also provides internal memory for the four
digits. This approach allows the user to asynchronously
address one of four digits, and load new data without regard to
the LED multiplex timing.
Figure1 is a block diagram of the DLX2416. The unit consists of
4 (5x7) LEDs and a single CMOS integrated chip. The IC chip
contains the column drivers and row drivers, 128 character
ROM, four word x7 bit Random Access Memory, oscillator for
multiplexing, multiplex counter/decoder, cursor memory,
address decoder, and miscellaneous control logic.
O SC
÷
128
Counter
÷7
Counter
Tim in g and C ont r ol Logic
Row Dec oder
Column Decoder
RO M
12 8x 35 Bit
AS CI I
Char a ct er
De code
44 80 Bit s
C olumn D ata
RAM Read Logic
D6
D5
D4
D3
D2
D1
D0
7 Bit A SC I I C ode
R AM
Mem ory
C ur s or
M e m or y
4x 1 Bit
Di sp l ay
O utp ut
Lo g ic
L a tche s
C ur s or Mem or y Bit s 0 to 3
4x7 B it
A dd res s Lines
WR
A0
A1
CE 1
CE 2
CU
Write
Add ress
Dec oder
CUE
2000 Infineon Technologies Corp. • Optoelectronics Division • San Jose, CA
www.infineon.com/opto • 1-888-Infineon (1-888-463-4636)
OSRAM Opto Semiconductors GmbH & Co. OHG • Regensburg, Germany
www.osram-os.com • +49-941-202-7178
1
May 31, 2000-12
OSRAM [ OSRAM GMBH ]
