Q68000A8643 Datasheet, PDF (5/10 Pages) OSRAM GmbH – X/Y Stackable 0.180’’ 4-Digit 5x7 Dot Matrix Alphanumeric Intelligent Display® Devices with Memory/Decoder/Driver

SLR2016, SLO2016, SLG2016, SLY2016, SCD5584A
Typical Loading State Table
WR A1 A0 D6 D5 D4 D3 D2 D1 D0 Digit
3210
H
previously loaded display
GRE Y
L L L H L L L H L H GRE E
L L H H L H L H L H GRUE
L H L H L L H H L L GL UE
L H H H L L L L H L BL UE
L L H H L L L H L H BL EE
L L L H L H L H H H BL EW
L X X see character code
see char. set
Dimming Circuit Using a 556 and Dimming
(Blanking) Timing
R₂
47 kΩ
R₁
200 Ω
C₂
0.01 µF
Dimming (Blanking)
Control
1
14
2
13
3
12
4
556
Dual Timer
11
5
10
V_CC = 5 V
R₃
500 kΩ
C₃
1000 pF
C₄
0.01 µF
Display Blanking
Blank the display by loading a blank or space into each digit of the
display or by using the (BL) display blank input. Setting the (BL)
input low does not affect the contents of data memory.
A flashing circuit can easily be constructed using a 555 as table
multivibrator. Figure 3 illustrates a circuit in which varying R1
(100K~10K) will have a flash rate of 1.0 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. Dim-
ming the display also reduces power consumption.
An example of a simple dimming circuit using a 556 is illustrated in
Figure 4. Adjusting potentiometer R3 will dim the display by chang-
ing the blanking pulse duty cycle.
Flashing Circuit Using a 555 and Flashing
(Blanking) Timing
V_CC = 5 V
6
9
C₁
4700 pF
7
8
1
0
~~ 200 µs
~~ _{5 kHz Blanking Frequency}
To BL Pin
on Display
IDCD5034
Blanking Pulse Width
4 µs min., 196 µs max.
IDCD5036
To BL
Pin on
Display
1
8
2
7
555
Timer
3
6
4
5
R₁
4.7 kΩ
R₂
100 kΩ
C₄
0.01 µF
C₃
10 µF
IDCD5033
1
0
~~500 ms
Blanking Pulse Width
~~ 2 Hz Blanking Frequency ~~ ^{50% Duty Factor}
IDCD5035
2006-01-23
5