DLG2416 데이터 시트보기 (PDF) - Infineon Technologies
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DLG2416
Infineon Technologies
DLG2416 Datasheet PDF : 7 Pages
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Loading Data
Setting the chip enable (CE1, CE2) to their true state will enable
data loading. The desired data code (D0-D6) and digit address
(A0, A1) must be held stable during the write cycle for storing
new data.
Data entry may be asynchronous and random. Digit 0 is
defined as right hand digit with A1=A2=0.`
To clear the entire internal four-digit memory hold the clear
(CLR) low for 1 µs. All illuminated dots will be turned off within
one complete display multiplex cycle, 1 msec minimum. The
clear function will clear both the ASCII RAM and the cursor
RAM.
Setting the chip enables (CE1, CE2) and cursor select (CU) to
their true state will enable cursor loading. A write (WR) pulse
will now store or remove a cursor into the digit location
addressed by A0, A1, as defined in data entry. A cursor will be
stored if D0=1 and will removed if D0=0. The cursor (CU) pulse
width should not be less than the write (WR) pulse or erroneous
data may appear in the display.
If the cursor is not required, the cursor enable signal (CUE)
may be tied low to disable the cursor function. For a flashing
cursor, simply pulse CUE. If the cursor has been loaded to any
or all positions in the display, then CUE will control whether the
cursor(s) or the characters will appear. CUE does not affect the
contents of cursor memory.
Loading Cursor
Setting the chip enables (CE1, CE2) and cursor select (CU) to
their true state will enable cursor loading. A write (WR) pulse
will now store or remove a cursor into the digit location
addressed by A0, A1, as defined in data entry. A cursor will be
stored if D0=1 and will removed if D0=0. The cursor (CU) pulse
width should not be less than the write (WR) pulse or erroneous
data may appear in the display.
If the cursor is not required, the cursor enable signal (CUE)
may be tied low to disable the cursor function. For a flashing
cursor, simply pulse CUE. If the cursor has been loaded to any
or all positions in the display, then CUE will control whether the
cursor(s) or the characters will appear. CUE does not affect the
contents of cursor memory.
Display Blanking
Blanking the display may be accomplished by loading a blank
or space into each digit of the display or by using the (BL) dis-
play blank input.
Setting the (BL) input low does not affect the contents of either
data or cursor memory.
A flashing circuit can easily be constructed using a 555 astable
multivibrator. Figure 3 illustrates a circuit in which varying R2
(100K~10K) will have a flash rate of 1 Hz~10 Hz.
The display can be dimmed by pulse width modulating the
(BL) at a frequency sufficiently fast to not interfere with the
internal clock. The dimming signal frequency should be 2.5
KHz or higher. Dimming the display also reduces power con-
sumption.
An example of a simple dimming circuit using a 556 is illus-
trated in Figure 4. Adjusting potentiometer R3 will dim the dis-
play by changing the blanking pulse duty cycle.
Figure 3. DLX2416—Flashing circuit using a 555
and Flashing (Blanking) timing
VCC=5.0 V
1
2
3
To BL
Pin on 4
Display
555
Timer
1
0
~~ 500 ms
~~2 Hz Blanking Frequency
8
7
6
5
C4
0.01 µF
R1
4.7 KΩ
R2
100 KΩ
C3
10 µF
Blanking Pulse Width
≈50% Duty Factor
Figure 4. DLX2416Dimming circuit using a 556
and Dimming (Blanking) timing
VCC=5.0 V
R2
47 KΩ
1
R1
200Ω
2
C2
0.01 µF 3
4
Dimming (Blanking)
Control
14
13
556
12
Dual Timer
11
R3
500 KΩ
C3
1000 pF
5
C1
6
4700 pF
7
10
C4
0.01 µF
9
To BL Pin
8
on Display
1
0
~~ 200 µs
~~ 5 KHz Blanking Frequency
Blanking Pulse Width
4 µs min., 196 µs max.
DLR/DLO/DLG2416
5–4
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