CPU Module
Front Panel LEOs
2-14
There are eight LEOs
on
the
MVME187 front panel: FAIL, STAT, RUN, SCON,
LAN, + 12V (LAN power), SCSI,
and
VME.
The
red
FAIL LED (part of DSl) is lit
when
the BRDFAIL signal line is active.
The yellow
STAT (status) LED (part of
DSl)
is controlled
by
software
on
the
MVME187.
The green
RUN LED (part of DS2) is lit
when
the local
bus
TIP*
signal line is
low.
The green
SCON LED
(part
of DS2) is lit
when
the VMEchip2
in
the
MVME187
is
the
VMEbus system controller.
The green LAN LED (part of
DS3) lights
when
the LAN chip is local
bus
master.
The MVME187 supplies + 12V
power
to the Ethernet transceiver interface
through
a fuse. The green
+12V
(LAN power) LED (part of DS3) lights
when
power
is available to the transceiver interface.
The green
SCSI LED (part of D54) lights
when
the
SCSI chip is local
bus
master.
The green VME LED (part of D54) lights
when
the
board
is using the VMEbus
or
when
the
board
is accessed
by
the VMEbus.
Reference
Guide
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