MC54HC589A 查看數據表（PDF） - Motorola => Freescale

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MC54HC589A

8-Bit Serial or Parallel-Input/Serial-Output Shift Register with 3-State Output

Motorola => Freescale 

MC54/74HC589A

FUNCTION TABLE

Inputs

Resulting Function

Operation

Output Serial Shift/ Latch

Enable Parallel Load Clock

Force output into high

H

X

X

impedance state

Load parallel data into

L

H

data latch

Transfer latch contents to

L

shift register

L

L, H,

Contents of input latch

L

and shift register are

unchanged

H

L, H,

Load parallel data into

L

L

data latch and shift

register

Shift serial data into shift

L

H

X

register

Load parallel data in data

L

H

latch and shift serial data

into shift register

LR = latch register contents

SR = shift register contents

a–h = data at parallel data inputs A–H

D = data (L, H) at serial data input SA

Shift

Clock

X

Serial

Input

SA

X

Parallel

Inputs

A–H

X

Data

Latch

Contents

X

Shift

Register

Contents

X

L, H,

X

a–h

a–h

U

X

X

X

L, H,

X

X

U

LRN → SRN

U

U

Output

QH

Z

U

LRH

U

X

X

a–h

a–h

a–h

h

D

X

D

a–h

*

SRA = D,

SRG → SRH

SRN → SRN+1

a–h

SRA = D,

SRG → SRH

SRN → SRN+1

U = remains unchanged

X = don’t care

Z = high impedance

* = depends on Latch Clock input

High–Speed CMOS Logic Data

5

DL129 — Rev 6

MOTOROLA

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