ADC0803, ADC0804
INT (14)
I/O WR (27) (NOTE)
I/O RD (25) (NOTE)
10K
ADC0803 - ADC0804
+
10µF
1
2
3
4
5
6
7
8
9
CS
V+ 20
5V
RD
CLK R
19
18
17
16
15
14
LSB
DB
DB
DB
DB
DB
WR
DB (13) (NOTE)
0
DB (16) (NOTE)
1
DB (11) (NOTE)
2
DB (9) (NOTE)
3
DB (5) (NOTE)
4
DB (18) (NOTE)
5
DB (20) (NOTE)
6
DB (7) (NOTE)
7
0
1
2
3
4
CLK IN
INTR
V
V
(+)
(-)
IN
IN
ANALOG
INPUTS
AGND
/2
DB 13
5
DB 12
6
150pF
V
REF
MSB
10 DGND
DB 11
7
5V
V+
OUT
B
T
T
T
T
T
T
AD (36)
15
AD (39)
14
AD (38)
13
AD (37)
12
AD (40)
11
AD (1)
10
5
4
3
2
1
0
5
4
3
2
1
0
B
B
B
B
B
8131
BUS
COMPARATOR
NOTE: Pin numbers for 8228 System Controller: Others are 8080A.
FIGURE 21. ADC080X TO 8080A CPU INTERFACE
14
INTERSIL [ Intersil ]
