HDSP-2301 HP [Agilent(Hewlett-Packard)], HDSP-2301 Datasheet - Page 36

• Manufacturer Part Number: HDSP-2301
• Description: Four Character 5.0 mm (0.20 inch) 5 x 7 Alphanumeric Displays
• Manufacturer: HP [Agilent(Hewlett-Packard)]

DATA
SYSTEM
BUS
I/O WR
RESET
I/O RD
Figure 22. 8080A Microprocessor Interface Utilizing an 8255 PIA for an HDSP-2470/-2471/-2472 Alphanumeric Terminal
Similarly, a typical power dissipa-
tion for a four character
HDSP-2000 display (n = 15, V
= 3.0 V, D.F. = 17.5%, V
V) can be calculated as:
A 4
A 1
A 0
P(I
INTERRUPT
REQUEST
CC
) = (45 mA) (5.00 V)
27
28
29
30
31
32
33
34
36
35
6
8
9
5
= 225 mW
3
D 7
D 6
D 5
D 4
D 3
D 2
D 1
D 0
CS
A 1
A 0
RD
WR
RESET
74LS00
8255A
INTEL
1
2
PB 7
PB 6
PB 5
PB 4
PB 3
PB 2
PB 1
PB 0
PC 2
PA 7
PA 6
PA 5
PA 4
PA 3
PA 2
PA 1
PA 0
PC 4
PC 6
PC 7
11
74LS132
25
24
23
22
21
20
19
18
16 (STB)
37
38
39
40
1
2
3
4
13
10 (ACK)
10 (OBF)
CC
12
13
= 5.00
20 F
8
74LS132
1 K
COL
MICROSWITCH 61SW12-1 KEYBOARD
4
5
74LS132
(17)
V CC
ER D 6 D 5 D 4 D 3
+
9
10
6
P(I
P(I
D 2 D 1 D 0
REF
COL
) = 5 (73 mA – 45 mA)
) = 5 (335 mA) (3.0 V)
= 52 mW
= 377 mW
V CC
ST
(5.00 V) (15/35)
(0.175)
(15/35) (0.175)
1000 pF
22 K
1
2
5
14 4A
11
13
10
15
14 4A
11
13
10
15
5
2
6
3
1
5
2
6
3
1
3
4
3A
2A
1A
4B
3B
2B
1B
SEL
ST
3A
2A
1A
4B
3B
2B
1B
SEL
ST
CL
74LS157
74LS157
B 1
B 2
A 1
A 2
1000 pF
13
7
4Y
3Y
2Y
1Y
4Y
3Y
2Y
1Y
Q
11
12
9
7
4
12
9
7
4
74LS122
6
1
2
74LS132
(18)
(19)
3
Some typical power dissipations
for other values of n, V
V
that at a D.F. of 17.5%, which
would be appropriate for a sun-
light viewable application, the
28
4
5
74LS00
CC
P
D
, are shown in Figure 25. Note
*16, 24, 32 OR 40 CHARACTER HDSP-2000 DISPLAY
BOARD DESIGNED TO INTERFACE TO THE HDSP-
2470/71/72 DISPLAY PROCESSOR CONTROLLER
6
6
10
12
14
16
18
20
23
21
19
17
15
13
11
22
8
2
4
1
RESET
DO 6
DO 5
DO 4
DO 3
DO 2
DO 1
DO 0
DATA
VALID
DI 7
DI 6
DI 5
DI 4
DI 3
DI 2
DI 1
DI 0
READY
CS
CONTROLLER
PROCESSOR
= P(I
= 654 mW
2470/71/72
DISPLAY
HDSP-
P(I
CC
COL
) + P(I
)
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
COL
M
C
D
G
H
N
O
Q
A
B
E
F
K
P
REF
J
L
I
ALPHANUMERIC
V B
COLUMN 1
COLUMN 2
COLUMN 3
COLUMN 4
COLUMN 5
CLOCK
DISPLAY DATA
V CC
GND
2416/24/32/40
, D.F.,
DISPLAY*
) +
HDSP-
(20)
AN1016.22