SN75LBC976

9CHANNEL DIFFERENTIAL TRANSCEIVER

SLLS133D − AUGUST 1992 − REVISED MAY 1995

2−15

POST OFFICE BOX 655303

POST OFFICE BOX 1443

APPLICATION INFORMATION

Table 1. Typical Signal and Terminal Assignments

SIGNAL

TERMINAL

SCSI DATA

SCSI CONTROL

IPI DATA

IPI CONTROL

CDE0

54

DIFFSENSE

DIFFSENSE

VCC

VCC

CDE1

55

GND

GND

XMTA, XMTB

GND

CDE2

56

GND

GND

XMTA, XMTB

SLAVE/MASTER

BSR

2

GND

GND

GND, BSR

GND

CRE

3

GND

GND

GND

VCC

1A

4

DB0, DB8

ATN

AD7, BD7

NOT USED

1DE/RE

5

DBE0, DBE8

INIT EN

GND

GND

2A

6

DB1, DB9

BSY

AD6, BD6

NOT USED

2DE/RE

7

DBE1, DBE9

BSY EN

GND

GND

3A

8

DB2, DB10

ACK

AD5, BD5

SYNC IN

3DE/RE

9

DBE2, DBE10

INIT EN

GND

GND

4A

10

DB3, DB11

RST

AD4, BD4

SLAVE IN

4DE/RE

11

DBE3, DBE11

GND

GND

GND

5A

19

DB4, DB12

MSG

AD3, BD3

NOT USED

5DE/RE

20

DBE4, DBE12

TARG EN

GND

GND

6A

21

DB5, DB13

SEL

AD2, BD2

SYNC OUT

6DE/RE

22

DBE5, DBE13

SEL EN

GND

GND

7A

23

DB6, DB14

C/D

AD1, BD1

MASTER OUT

7DE/RE

24

DBE6, DBE14

TARG EN

GND

GND

8A

25

DB7, DB15

REQ

AD0, BD0

SELECT OUT

8DE/RE

26

DBE7, DBE15

TARG EN

GND

GND

9A

27

DBP0, DBP1

I/O

AP, BP

ATTENTION IN

9DE/RE

28

DBPE0, DBPE1

TARG EN

XMTA, XMTB

VCC

ABBREVIATIONS:

DBn, data bit n, where n = (0,1, . . . ,15)

DBEn, data bit n enable, where n = (0,1, . . . ,15)

DBP0, parity bit for data bits 0 through 7 or IPI bus A

DBPE0, parity bit enable for P0

DBP1, parity bit for data bits 8 through 15 or IPI bus B

DBPE1, parity bit enable for P1

ADn or BDn, IPI Bus A − Bit n (ADn) or Bus B − Bit n (BDn), where n = (0,1, ...,7)

AP or BP, IPI parity bit for bus A or bus B

XMTA or XMTB, transmit enable for IPI bus A or B

BSR, bit significant response

INIT EN, common enable for SCSI initiator mode

TARG EN, common enable for SCSI target mode

NOTE: Signal inputs are shown as active high. If only active-low inputs are available, logic inversion is

accomplished by reversing the B + and B − connecter terminal assignments.