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W78c32c, Typical application circuit – Rainbow Electronics W78C32C User Manual

Page 11

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W78C32C

Publication Release Date: July 1999

- 11 -

Revision A2

TYPICAL APPLICATION CIRCUIT

Using External Program Memory and Crystal

AD0

A0

A0

A0

10

A1

9

A2

8

A3

7

A4

6

A5

5

A6

4

A7

3

A8

25

A9

24

A10

21

A11

23

A12

2

A13

26

A14

27

A15

1

CE

20

OE

22

O0

11

O1

12

O2

13

O3

15

O4

16

O5

17

O6

18

O7

19

27512

AD0

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

AD0

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

39
38
37

36
35
34
33
32

17

WR

P0.0
P0.1
P0.2
P0.3
P0.4
P0.5
P0.6
P0.7

P2.0
P2.1
P2.2
P2.3
P2.4
P2.5
P2.6
P2.7

RD

16

PSEN

29

ALE

30

TXD

11

RXD

10

W78C32C

10 u

8.2 K

V

CRYSTAL

C1

C2

R

AD1
AD2
AD3
AD4
AD5
AD6

AD7

AD1
AD2
AD3
AD4
AD5
AD6
AD7

GND

A1
A2
A3
A4
A5
A6
A7

A1
A2
A3
A4
A5
A6
A7
A8
A9

AD1
AD2
AD3
AD4
AD5
AD6
AD7

A10

A11
A12

A13

A14
A15

GND

21
22
23
24
25
26
27
28

A8

A9
A10
A11
A12
A13
A14
A15

CC

Figure A

CRYSTAL C1 C2 R

16 MHz

30P

30P

-

24 MHz

15P

15P

-

33 MHz

10P

10P

6.8K

40 MHz

5P

5P

6.8K

Above table shows the reference values for crystal applications.

Note: C1, C2, R components refer to Figure A.