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ADC0804 View Datasheet(PDF) - Intersil

Part NameDescriptionManufacturer
ADC0804 8-Bit, Microprocessor-Compatible, A/D Converters Intersil
Intersil Intersil
ADC0804 Datasheet PDF : 16 Pages
First Prev 11 12 13 14 15 16
ADC0802, ADC0803, ADC0804
IRQ (4)[D] ††
RD
RD
2
IORQ
ADC0802-
ADC0804
WR
WR
3
74C32
ANALOG
INPUTS
150pF
10K
ADC0802 - ADC0804
1 CS
V+ 20
2 RD
3 WR
CLK R 19
DB0 18 LSB
4 CLK IN DB1 17
5 INTR
DB2 16
6 VIN (+) DB3 15
7 VIN (-) DB4 14
8 AGND DB5 13
9 VREF/2
10 DGND
DB6 12
DB7 11 MSB
1
2
6
3
1/2 DM8092 4
5
R/W (34) [6]
+
10µF
ABC
5V (8) 1 2 3
D0 (33) [31]
D1 (32) [29]
D2 (31) [K]
D3 (30) [H]
D4 (29) [32]
D5 (28) [30]
D6 (27) [L]
D7 (26) [J]
A12 (22) [34]
A13 (23) [N]
A14 (24) [M]
A15 (25) [33]
VMA (5) [F]
Numbers in parentheses refer to MC6800 CPU Pinout.
†† Numbers or letters in brackets refer to standard MC6800 System Common Bus Code.
FIGURE 22. MAPPING THE A/D AS AN
I/O DEVICE FOR USE
WITH THE Z-80 CPU
FIGURE 23. ADC0802 TO MC6800 CPU INTERFACE
ANALOG
INPUTS
150pF
18
CB1
19
CB2
10K
ADC0802 - ADC0804
1 CS
V+ 20
5V
2 RD CLK R 19
3 WR
DB0 18 LSB
10
4 CLK IN DB1 17
11
5 INTR
DB2 16
12
6 VIN (+) DB3 15
13
7 VIN (-) DB4 14
14
8 AGND DB5 13
15
9 VREF/2 DB6 12
16
10 DGND DB7 11 MSB
17
MC6820
(MCS6520)
PIA
PB0
PB1
PB2
PB3
PB4
PB5
PB6
PB7
FIGURE 24. ADC0802 TO MC6820 PIA INTERFACE
6-19
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