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DLX3416 Datasheet(PDF) 5 Page - OSRAM GmbH

No. de pieza DLX3416
Descripción Electrónicos  Intelligent Display Device
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Fabricante Electrónico  OSRAM [OSRAM GmbH]
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DLX3416 Datasheet(HTML) 5 Page - OSRAM GmbH

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 2000 Infineon Technologies Corp. • Optoelectronics Division • San Jose, CA
Appnote 17
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
5
May 31, 2000-12
Figure 7. 16-digit parallel I/O system
Figure 8. Mapped interface.
Figure 9. Interface with 6800 microprocessor
0-6
7
Display
Port A
D0
Display
Display
Display
D3
D4
D7
D8
D11
D12
D15
Port B
Port C
0
1
2
3
4
5
6
7
0
1
2
3
4
5
6
7
Control
Data
8080
µP
System
8255
Vcc
GND
D0–D6
CU
CLR
CUE
BL
A0
A1
A2
A3
3
2
1
0
WR
A
B
C
D
7442
5
/
Address
Dis play
Select
Decoder
Parallel
I/0 Device
Optional
Buffers
Reset
Int
Hold
Wait
Display Display D isplay Display
8980
Z80
6502
D15
D0
OSC
A0
A1
A2
A3
Data 0-6
Data
Control
CUE
CLR
BL
WR
Address
Data
Control
Data
Address
DBE
Decoder
6820
PIA
CUE
BL
CLR
Data
Address
H1
H2
01
02
Clock
Driver
6800
BA
VMA
R/W
CE CE
Reset
NMI
Halt
IRQ
TSC
A0–A1
D0–D7
Display
Display
Display
Display
Data
D15
D0
W
Figure 7 illustrates a 16 character display with an 8080 system
using the 8255 programmable peripheral interface I/O device.
The following program will display a simple 16 character mes-
sage using this interface.
I/O or Memory Mapped Addressing
Some designers may wish to avoid the additional cost of a par-
allel I/O in their system. Structuring the addressing architecture
for the 3416 to look like a set of peripheral or output devices
(I/O mapped) or RAM’s and ROM’s (memory mapped) is very
easy. Figure 8 shows the simplicity of interfacing to micropro-
cessors, such as 8080, Z80 and 6502 as examples.
The interface with the 6800 microprocessor in Figure 9 illus-
trates the need for designers to check the timing requirements
of the 3416 and the µP. The typical data output hold time is only
30 ns for DBE=
∅2 timing; two inverters in the DBE line are
added to increase the data output hold time for compatibility
with the 50 nS minimum specification of the 3416.
Conclusion
Note that although other manufacturers’ products are used in
examples, this application note does not imply specific
endorsement, or recommendation or warranty of other manu-
facturer’s products by Infineon / OSRAM.
The interface schemes shown demonstrate the simplicity of
using the 3416 with microprocessors. The slight differences
encountered with various microprocessors to interface with the
3416 are similar to those encountered when using different
RAMs. The techniques used in the examples were shown for
their generality, and any display of this family are interchange-
able in these examples. The user will undoubtedly invent other
schemes to optimize his particular system to its requirements.


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