TRUTH TABLE

Inputs

Outputs

Number of Pulsed or Logic Level

(0 = Low; 1 = High; X = Don’t Care)

Number of Pulses or Output

Logic Level

(L = LOW; H = High)

DCBA

CLK

INH IN

STR

CAS

CLR

SET

OUT

OUT

INH

OUT

”9”

OUT

0000

10

0000

0L

H

1

1

0001

10

0000

0111

1

0010

10

0000

0221

1

0011

10

0000

0331

1

0100

10

0000

0441

1

0101

10

0000

0551

1

0110

10

0000

0661

1

0111

10

0000

0771

1

1000

10

0000

0881

1

1001

10

0000

0991

1

1010

10

0000

0881

1

1011

10

0000

0991

1

1100

10

0000

0881

1

1101

10

0000

0991

1

1110

10

0000

0881

1

1111

10

0000

0991

1

XXXX

10

1000

0

ss

H

s

XXXX

10

0100

0L

H

1

1

XXXX

10

0010

0

H

q

11

1

X

X

X

10

0001

0

10

10

H

L

0

X

X

X

10

0001

0L

H

H

L

XXXX

10

0000

1L

H

L

H

q Output same as the first 16 lines of this truth table (depending on value of A, B, C, D)

s Depends on internal state of counter.

HCC/HCF4527B

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