Motorola MVME1603, Installation And Use Manual

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Functional Description
3-21
3
Front Panel Indicators (DS1 - DS6)
There are six LEDs on the MVME1603/1604 front panel:
CHS
,
BFL
,
CPU
,
PCI
,
FUS
, and
SYS
.
❏ CHS
(DS1, yellow). Checkstop; driven by the MPC603/604 status
lines on the MVME1603/1604. Lights when a halt condition from
the processor is detected.
❏ BFL
(DS2, yellow). Board Failure; lights when the
BRDFAIL
∗
signal
line is active.
❏ CPU
(DS3, green). CPU activity; lights when the
DBB
∗
(Data Bus
Busy) signal line on the processor bus is active.
❏ PCI
(DS4, green). PCI activity; lights when the
IRDY
∗
(Initiator
Ready) signal line on the PCI bus is active. This indicates that the
PCI mezzanine (if installed) is active.
❏ FUS
(DS5, green). Fuse OK; lights when +5Vdc, +12Vdc, and –
12Vdc power is available from the base board to the transition
module and remote devices.
Note
The circuitry monitored by the
FUS
LED differs between the
MVME1600-001 and MVME1600-011 versions of the base
board. The differences are detailed under the respective base
board descriptions in Chapter 1.
Because the
FUS
LED monitors the status of several voltages
on the MVME1600-001, it does not directly indicate the
condition of any single fuse. If the LED flickers or goes out,
check all the fuses (polyswitches).
❏ SYS
(DS6, green). System Controller; lights when the VMEchip2
in the MVME1603/1604 is the VMEbus system controller.