Ampro Corporation P5X Manuale Utente

Little Board/P5x Technical Manual

 

2–37

2

DB0*

Data Bit 0 (LSB)

4

DB1*

Data Bit 1

6

DB2*

Data Bit 2

8

DB3*

Data Bit 3

10

DB4*

Data Bit 4

12

DB5*

Data Bit 5

14

DB6*

Data Bit 6

16

DB7*

Data Bit 7

18

DBP*

Data Bit Parity

26

TERM

PWR

Termination +5V DC

32

ATN*

Attention

34

GROUND

Signal Ground

36

BSY*

Busy

38

ACK*

Transfer

Acknowledge

40

RST*

Reset

42

MSG*

Message

44

SEL*

Select

46

C/D*

Control/Data

48

REQ*

Transfer Request

50

I/O*

Data Direction

25

N/A

Key Pin

1-49(odd), 20,22,24,28,30

Ground

RIBBON

3M 3425-7600
Latching Clip 3505-8050

DISCRETE WIRE

MOLEX HOUSING 22-55-
2502
PIN 16-02-0103

SCSI Interface Configuration

Enable or disable the SCSI interface using Setup. Refer to the Setup description beginning on page
2–62.

The SCSI interface is a PCI peripheral and is assigned to a PCI interrupt using the plug-and-play
logic in the BIOS. No user setup is required

The SCSI interface uses “active terminators” for the SCSI bus. Active terminators draw less current
than 330/220 ohm terminators (standard for non-UltraSCSI interfaces), are less susceptible to
noise, and are required for the high data transfer rates of UltraSCSI. Termination is controlled by
the SCSI BIOS. There is no user setting.

Only the SCSI devices on each end of the SCSI bus should be terminated.