W78c32c – Rainbow Electronics W78C32C User Manual
Page 12

W78C32C
- 12 -
Expanded External Data Memory and Oscillator
10 u
8.2 K
V
OSCILLATOR
EA
31
XTAL1
19
XTAL2
18
RST
9
INT0
12
INT1
13
T0
14
T1
15
P1.0
1
P1.1
2
P1.2
3
P1.3
4
P1.4
5
P1.5
6
P1.6
7
P1.7
8
P0.0
39
P0.1
38
P0.2
37
P0.3
36
P0.4
35
P0.5
34
P0.6
33
P0.7
32
P2.0
21
P2.1
22
P2.2
23
P2.3
24
P2.4
25
P2.5
26
P2.6
27
P2.7
28
RD
17
WR
16
PSEN
29
ALE
30
TXD
11
RXD
10
W78C32C
AD0
AD1
AD2
AD3
AD4
AD5
AD6
AD7
AD0
AD1
AD2
AD3
AD4
AD5
AD6
AD7
A0
A1
A2
A3
A4
A5
A6
A7
D0
3
Q0
2
D1
4
Q1
5
D2
7
Q2
6
D3
8
Q3
9
D4
13
Q4
12
D5
14
Q5
15
D6
17
Q6
16
D7
18
Q7
19
OC
1
G
11
74LS373
A0
A1
A2
A3
A4
A5
A6
A7
10
9
8
7
6
5
4
3
A0
A1
A2
A3
A4
A5
A6
A7
AD0
AD1
AD2
AD3
AD4
AD5
AD6
AD7
11
12
13
15
16
17
18
19
D0
D1
D2
D3
D4
D5
D6
D7
A8
A9
A10
A11
A12
A13
A14
25
24
21
23
26
1
20
2
A8
A9
A10
A11
A12
A13
A14
CE
GND
A8
A9
A10
A11
A12
A13
A14
GND
22
27
OE
WR
20256
CC
Figure B
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