2–3
DLR/DLO/DLG3416
AC Characteristics
V
CC
=5.0 V
Parameter
Guaranteed Minimum Timing Parameters at
±
0.5 V
Note: 1. T
ACC
=Set Up Time + Write Time + Hold Time.
Loading Data
Setting the chip enable (CE1, CE2, CE3, CE4) to their true state will
enable loading. The desired data code (D0-D6) and digit address (A0,
A1) must be held stable during the write cycle for storing new data.
Symbol
–40
°
C
+25
°
C
+85
°
C
Units
Chip Enable Set Up Time
T
CES
0
0
0
ns
Address Set Up Time
T
AS
10
10
10
ns
Cursor Set Up Time
T
CUS
10
10
10
ns
Chip Enable Hold Time
T
CEH
0
0
0
ns
Address Hold Time
T
AH
T
CUH
T
CLRD
T
W
T
DS
T
DH
T
CLR
T
ACC
20
30
40
ns
Cursor Hold Time
20
30
40
ns
Clear Disable Time
1
1
1
μ
s
Write Time
60
70
90
ns
Data Set Up Time
20
30
50
ns
Data Hold Time
20
30
40
ns
Clear Time
1
1
1
μ
s
Access Time
90
110
140
ns
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
μ
s. 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.
Loading Cursor
Setting the chip enables (CE1, CE2, CE3, CE4) 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 errone-
ous 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 con-
tents of cursor memory.
Typical Loading Data State Table
X=don’t care
Loading Cursor State Table
X=don’t care
I
=all dots on
BL
CE1
CE2
CE3
CE4
CUE
CU
WR
CLR
A1
A0
D6
D5
D4
D3
D2
D1
D0
Digit
3
G
G
G
G
G
G
G
G
G
B
2
R
R
R
R
R
R
R
R
L
L
1
E
E
E
E
E
E
E
U
U
U
0
Y
Y
Y
Y
Y
Y
E
E
E
E
H
H
H
H
H
H
H
H
H
H
L
H
H
H
X
L
X
X
X
X
H
H
H
H
X
H
X
H
X
X
L
X
X
X
H
H
H
H
X
H
X
H
X
X
X
H
X
X
L
L
L
L
X
L
X
L
X
X
X
X
H
X
L
L
L
L
X
L
X
L
L
L
L
L
L
L
L
L
L
L
X
L
L
L
X
X
X
X
X
X
H
H
H
H
X
H
X
H
H
X
X
X
X
H
L
L
L
L
H
L
X
L
H
H
H
H
H
H
H
H
H
H
H
H
L
H
previously loaded display
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
L
L
H
L
L
H
H
L
H
L
H
L
H
H
L
L
X
X
L
blank display
H
H
L
L
clears character display
X
X
see character code
X
X
X
X
X
L
H
L
L
X
X
X
X
X
L
L
H
L
X
X
X
X
X
H
H
H
L
X
X
X
X
X
L
L
L
H
X
X
X
X
X
H
H
L
L
L
L
H
H
H
G
L
U
E
see character set
BL
CE1
CE2
CE3
CE4
CUE
CU
WR
CLR
A1
A0
D6
D5
D4
D3
D2
D1
D0
Digit
3
B
B
B
B
B
I
I
B
B
B
2
E
E
E
E
I
I
E
E
E
E
1
A
A
A
I
I
I
I
A
A
I
0
R
R
I
I
I
I
I
R
R
I
H
H
H
H
H
H
H
H
H
H
X
X
H
H
H
H
H
X
H
X
X
X
H
H
H
H
H
X
H
X
X
X
L
L
L
L
L
X
L
X
X
X
L
L
L
L
L
X
L
X
L
H
H
H
H
H
H
L
L
H
X
X
L
L
L
L
L
X
L
X
H
H
L
L
L
L
L
H
L
H
H
H
H
H
H
H
H
H
H
H
previously loaded display
display previously stored cursors
L
L
X
X
L
H
X
X
H
L
X
X
H
H
X
X
H
L
H
L
disable cursor display
H
H
X
X
display stored cursors
X
X
X
X
L
X
X
X
X
L
X
X
X
X
H
X
X
X
X
L
H
H
H
H
L
X
X
X
X
L