Fujitsu MB3773 User Manual download pdf (Page 22)

MB3773

22

EXAMPLE 10: Circuit for Monitoring Multiple Microprocessor

VCC ( = 5 V)

1

2

3

4

8

7

6

5

CT

MB3773

RESET

RESET

CK

GND

Notes : • connects from FF1 and FF2 outputs Q1 and Q2 to the NOR input.

• Depending on timing, these connections may not be necessary.

• Example : R

1 = R2 = 2.2 kΩ

C

T = 0.1 µF

RESET

RESET

CK

GND

RESET

RESET

CK

GND

S

D

3

CK3

R

Q

3

Q3

S

D

2

CK2

R

Q

2

Q2

S

D

1

CK1

R

Q

1

Q1

FF3FF2FF1

R2

R1

CK1

Q1

CK2

Q2

CK3

Q3

NOR

Output

Figure 1

Figure 2

***

*: Microprocessor

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