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40 Pin External
Bus Signal Interface
4(
Pin
No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
) Pin External Bus Signal
Signal
VDD
GND
ADO
AD2
AD4
AD6
A8
A10
A12
A14
GND
RD
IO/M
ALE
CLK
RD +WF
INTR
GND
RAM
RESET
N C
Pin
No.
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
. 25
24
23
22
21
Signal
VDD
GND
ADI
AD3
AD5
AD7
A9
A l l
A13
A15
GND
WR
SO
SI
CE for
I/O Cont.
RESET
out
INTA
GND
N C
N C
20
19 18 17 16 15 14 13 12 1 1 10 9
8
O Q Q B Q Q Q B O B Q E I O B Q Q B Q B Q
21
22
23
24
25
26
27
28
29 30
31
32 33
34
35
36 37
38
39 40
62 / References
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