Motorola 700/800-Series Manuel D’Utilisation

1-24

Board Level Hardware Description

Support functions for the 82596CA are provided by the MC2chip. 
Refer to the 82596CA user's guide and to the MC2chip description 
in the MVME162LX Embedded Controller ProgrammerÕs Reference 
Guide for detailed programming information. 

The MVME162LX supports mass storage subsystems through the 
industry-standard SCSI bus. These subsystems may include hard 
and floppy disk drives, streaming tape drives, and other mass 
storage devices. The SCSI interface is implemented using the NCR 
53C710 SCSI I/O controller. 

Support functions for the 53C710 are provided by the MC2chip. 
Refer to the NCR 53C710 user's guide and to the MC2chip 
description in the MVME162LX Embedded Controller ProgrammerÕs 
Reference Guide for detailed programming information. 

It is important that the SCSI bus be properly terminated at both 
ends.

The MVME162LX main board provides terminators for the SCSI 
bus. The SCSI terminators are enabled/disabled by a jumper on 
header J12. If the SCSI bus ends at the MVME162LX, a jumper must 
be installed between J12 pins 1 and 2.

The 

FUSES

 LED (part of DS2) on the MVME162LX front panel 

monitors the SCSI bus

 

TERMPWR signal in addition to LAN power 

and IndustryPack power; the 

FUSES

 LED lights when all fuses are 

operational. The fuses are solid-state devices that reset when the 
short is removed.

Because any device on the SCSI bus can provide TERMPWR, the 

FUSES

 LED does not directly indicate the condition of the fuse.