DLX2416 Datasheet, PDF (1/5 Pages) OSRAM GmbH – Intelligent Display Device

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
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.
Figure 1. Block diagram–DLX2416
Rows 0 to 6
Row Control Logic
& Row Drivers
Display
BL
3210
Columns 0 to 19
OSC
÷128
Counter
÷7
Counter
Timing and Control Logic
Row Decoder
ROM
RAM Read Logic
D6
128x35 Bit
ASCII
Column Data
D5
7 Bit ASCII Code
Character
D4
RAM
Decode
D3
Memory
4480 Bits
D2
Cursor
D1
Memory
D0
4x7 Bit
4x1 Bit
Cursor Memory Bits 0 to 3
Address Lines
WR
A0
A1
CE1
CE2
CU
Write
Address
Decoder
 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 • [phone]
1
Display
Output
Logic
CUE
May 31, 2000-12