SN75ALS162

OCTAL GENERAL-PURPOSE INTERFACE BUS TRANSCEIVER

SLLS020C – JUNE 1986 – REVISED MAY 1995

2

POST OFFICE BOX 655303

RECEIVE/TRANSMIT FUNCTION TABLE

CONTROLS

BUS-MANAGEMENT CHANNELS

DATA-TRANSFER CHANNELS

SC

DC

TE

ATN†

ATN†

SRQ

REN

IFC

EOI

DAV

NDAC

NRFD

(controlled by DC)

(controlled by SC)

(controlled by TE)

H

H

H

R

T

T

T

R

R

H

H

L

R

T

R

T

R

R

L

L

H

T

R

R

R

T

T

L

L

L

T

R

T

R

T

T

H

L

X

R

T

R

R

T

T

L

H

X

T

R

T

T

R

R

H

T

T

L

R

R

H = high level, L = low level, R = receive, T = transmit, X = irrelevant

Direction of data transmission is from the terminal side to the bus side, and the direction of data receiving is from the bus side to the terminal side.

Data transfer is noninverting in both directions.

† ATN is a normal transceiver channel that functions additionally as an internal direction control or talk enable for EOI whenever the DC and TE

inputs are in the same state. When DC and TE are in opposite states, the ATN channel functions as an independent transceiver only.

CHANNEL IDENTIFICATION TABLE

NAME

IDENTITY

CLASS

DC

Direction Control

TE

Talk Enable

Control

SC

System Control

ATN

Attention

SRQ

Service Request

REN

Remote Enable

Bus Management

IFC

Interface Clear

EOI

End or Identify

DAV

Data Valid

NDAC

No Data Accepted

Data Transfer

NRFD

Not Ready for Data