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参数资料
| 型号： | DLX2416 |
| 厂商： | Osram Opto Semiconductors GmbH |
| 英文描述： | Intelligent Display Device |
| 中文描述： | 智能显示装置 |
| 文件页数： | 3/5页 |
| 文件大小： | 213K |
| 代理商： | DLX2416 |
www.in
fi
neon.com/opto
1-888-In
fi
neon (1-888-463-4636)
OSRAM Opto Semiconductors GmbH & Co. OHG
Regensburg, Germany
www.osram-os.com
+49-941-202-7178
2000 In
fi
neon Technologies Corp.
Optoelectronics Division
San Jose, CA
Appnote 14
3
May 31, 2000-12
Operation
Multiplexed display systems sequentially read and display data
from a memory device. In synchronous systems, control cir-
cuitry must compare the location of data to be read to the loca-
tion or position of new data to be stored or displayed, i.e.,
synchronize before a Write can be done. This can be slow and
cumbersome.
Data entry in “intelligent displays” is asynchronous and may be
done in any random order. Loading data is similar to writing into
a RAM. Each digit has its own memory location and will display
until replaced by another code.
The waveforms of Figure 4 demonstrate the relationships of
the signals required to generate a write cycle. (Check individual
data sheet for minimum values). As can be seen from the
waveforms, all signals are referenced from the rising or trailing
edge of write.
Cursor
The cursor function causes all dots to light at 50% brightness.
The cursor can be used to indicate the position in the display of
the next character to be entered. The cursor is not a character
but overrides the display of a stored character. Upon removal of
the cursor, the display will again show the character stored in
memory.
Figure 4. Write cycle waveforms
Figure 5. Tables—loading data and loading cursor
t
AH
t
W
t
AS
t
DS
t
DH
4 V
2 V
0 V
4 V
2 V
0 V
4 V
2 V
0 V
CU
,
A
0
,
A
1
CE1,CE2
WR
Data 0
–
6
H
H
H
H
H
H
H
H
H
Blank
Previous Characters
Normal Data Entry
Stored Cursors
NC
NC
NC
L
H
H
H
H
H
H
H
H
H
H
NC
NC
NC
NC
NC
D
D
D
See Character Set
BL CE1 CE2 CUE CU WR CLR A
1
A
0
D6 D5 D4 D3 D2 D1 D0
Digit Digit Digit Digit
3 2 1 0
Loading Cursor
Loading Data
X
H
X
X
L
L
L
L
L
L
L
X
L
L
L
L
L
L
L
L
L
L
H
H
H
H
H
H
H
H
H
H
H
X
X
X
H
L
L
L
L
L
L
L
H
H
H
H
H
H
H
H
H
H
H
X
X
X
X
L
L
H
H
L
H
–
X
X
X
X
L
H
L
H
L
L
–
X
X
X
X
H
H
H
H
H
H
–
X
X
X
X
L
L
L
L
L
L
–
X
X
X
X
L
L
L
L
L
L
–
X
X
X
X
L
L
L
L
L
H
–
X
X
X
X
L
L
L
H
H
L
–
X
X
X
X
L
H
H
L
L
H
–
X
X
X
X
H
L
H
L
H
H
–
X
X
H
X
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
H
H
H
H
H
L
L
H
H
H
L
L
L
L
H
L
H
X
H
L
L
L
L
H
L
H
H
H
H
H
H
H
H
H
H
X
X
L
L
H
H
X
L
X
X
X
L
H
L
H
X
L
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
H
H
H
H
X
L
X
NC
NC
NC
NC
C
C
C
K
NC
NC
NC
B
B
NC
B
B
NC
NC
A
A
NC
A
E
E
D
D
NC
NC
K
K
NC
B
B
E
E
E
X=Don
‘
t care
NC=No change from previously displayed characters
=all dots/segments on
at half brightness
The cursor can be written into any digit position by setting the
cursor enable (CUE) high, setting the digit address (A1, A0),
enabling Chip Enable, (CE1, CE2), cursor select (CU), Write
(WR) and Data (D0). A high on data line D0 will place a cursor
into the position set by the address A0 and A1. Conversely, a
low on D0 will remove the cursor. The cursor will remain dis-
played after the cursor (CU) and write (WR) signals have been
removed. During the cursor-write sequence, data lines D1
through D6 are ignored.
If the user does not wish to use the cursor function, the cursor
enable (CUE) can be tied low to disable the cursor function. For
a flashing cursor, simply pulse the CUE line after cursor data
has been stored.
General Design Considerations
Using Positive true logic, address order is from right to left. For
left to right address order, use the “ones complement” or sim-
ple inversion of the addresses.
A “display test” or “lamp test” function can be realized by sim-
ply storing a cursor into all digits.
Because of the random state of the cursor RAM after power
up, if the cursor function is to be used, it will be necessary to
clear cursors initially to assure that all cursor memories contain
its zero state. This is easily accomplished with the CLR
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