ADC-0803 Harris, ADC-0803 Datasheet - Page 15

• Manufacturer Part Number: ADC-0803
• Description: (ADC0802 - ADC0804) 8-Bit/ Microprocessor- Compatible/ A/D Converters
• Manufacturer: Harris

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FIGURE 22. MAPPING THE A/D AS AN
IORQ
WR
RD
74C32
I/O DEVICE FOR USE
WITH THE Z-80 CPU
WR
RD
2
3
ADC0802-
ADC0804
ANALOG
INPUTS
FIGURE 24. ADC0802 TO MC6820 PIA INTERFACE
150pF
ADC0802, ADC0803, ADC0804
††
†
ANALOG
INPUTS
Numbers or letters in brackets refer to standard MC6800 System Common Bus Code.
Numbers in parentheses refer to MC6800 CPU Pinout.
10
ADC0802 - ADC0804
1
2
3
4
5
6
7
8
9
150pF
FIGURE 23. ADC0802 TO MC6800 CPU INTERFACE
10K
CS
RD
WR
CLK IN
INTR
V
V
AGND
V
DGND
IN
IN
REF
6-19
(+)
(-)
/2
CLK R
DB
DB
DB
DB
DB
DB
DB
DB
V+
0
1
2
3
4
5
6
7
10
ADC0802 - ADC0804
1
2
3
4
5
6
7
8
9
20
19
18
17
16
15
14
13
12
11
10K
CS
RD
WR
CLK IN
INTR
V
V
AGND
V
DGND
LSB
MSB
IN
IN
REF
1
(+)
(-)
/
2
/2
5V
DM8092
6
CLK R
DB
DB
DB
DB
DB
DB
DB
DB
18
19
10
11
12
13
14
15
16
17
V+
0
1
2
3
4
5
6
7
20
19
18
17
16
15
14
13
12
11
1
2
3
4
5
CB
CB
PB
PB
PB
PB
PB
PB
PB
PB
(MCS6520)
LSB
MSB
MC6820
0
1
2
3
4
5
1
2
6
7
PIA
D
D
D
D
D
D
D
D
A
A
A
A
VMA (5) [F]
0
1
2
3
4
5
6
7
12
13
14
15
(33) [31]
(32) [29]
(31) [K]
(30) [H]
(29) [32]
(28) [30]
(27) [L]
(26) [J]
(22) [34]
(23) [N]
(24) [M]
(25) [33]
+
10 F
IRQ (4)
R/W (34) [6]
5V (8)
†
A B C
1 2 3
[D]
††