Motorola MVME167 Series User Manual page 28

Hardware Preparation and Installation
Multiple MVME167 modules may be configured into a single VME card cage. In
2
general, hardware multiprocessor features are supported.
Other MPUs on the VMEbus can interrupt, disable, communicate with and determine
the operational status of the processor(s). One register of the GCSR set includes four
bits which function as location monitors to allow one MVME167 processor to
broadcast a signal to other MVME167 processors, if any. All eight registers are
accessible from any local processor as well as from the VMEbus.
The MVME167 provides +12 Vdc power to the Ethernet LAN transceiver interface
through a 1 amp fuse F2 located on the MVME167 module. The +12V LED lights
when +12 Vdc is available. The fuse is socketed, and located near diode CR1. If the
Ethernet transceiver fails to operate, check the fuse. When using the MVME712M
module, the yellow LED (DS1) on the MVME712M front panel lights when LAN
power is available, indicating that the fuse is good.
The MVME167 provides SCSI terminator power through a 1 amp fuse F1 located on
the P2 Adapter Board. The fuse is socketed. If the fuse is blown, the SCSI devices may
not operate or may function erratically. When the P2 Adapter Board is used with an
MVME712M and the SCSI bus is connected to the MVME712M, the green LED
(DS2) on the MVME712M front panel lights when there is SCSI terminator power. If
the LED flickers during SCSI bus operation, the fuse should be checked.
2-8 MVME167 Single Board Computer User's Manual