HCS165MS

FN2481 Rev 2.00

Page 2 of 9

September 1995

Functional Diagram

TRUTH TABLE

OPERATING

MODES

INPUTS

Qn REGISTER

OUTPUTS

PL

CE

CP

DS

D0 - D7

Q0

Q1 - Q6

Q7

Q7

Parallel Load

L

X

X

X

L

L

L - L

L

H

LX

X

X

H

H

H - H

H

L

Serial Shift

H

L

l

X

L

Q0 - Q5

Q6

Q6

H

L

h

X

H

Q0 - Q5

Q6

Q6

Hold “Do Nothing”

H

H

X

X

X

Q0

Q1 - Q6

Q7

Q7

H = HIGH voltage level

h = HIGH voltage level one setup time prior to the LOW-to-HIGH clock transition

L = LOW voltage level

l =

LOW voltage level one setup time prior to the LOW-to-High clock transition

Qn = Lower case letters indicate the state of the referenced output one set-up time prior to the LOW-to-HIGH clock transition.

X = Don’t Care

= LOW-to-HIGH clock transition.

PL

CP

D0

D1

D2

D3

D4

D5

D6

D7

CE

DS

D7

D7

CL

FF

PL

DP

DS Q

CL

FF

PL

DP

DS Q

CL

FF

PL

DP

DS Q

CL

FF

PL

DP

DS Q

CL

FF

PL

DP

DS Q

CL

FF

PL

DP

DS Q

CL

FF

PL

DP

DS Q

CL

FF

PL

DP

DS Q