Motorola Single Board Computer, MVME5100 manual Status Indicators, Connectors, RST Indicator DS1

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Operation

The on-board Universe ASIC includes both a global and a local reset driver. When the ASIC operates as the System Controller, the reset driver provides a global system reset by asserting the SYSRESET# signal.

Additionaly, when the MVME5100 is configured as a System Controller (SCON), a SYSRESET# signal may be generated by toggling the ABT/RST switch to RST, or by a power-up reset, or by a watchdog timeout, or by a control bit in the Miscellaneous Control Register (MISC_CTL) in the Universe ASIC.

Note SYSRESET# remains asserted for at least 200 ms, as required by the VMEbus specification.

Status Indicators

There are two Light-Emitting Diode (LED) status indicators located on the MVME5100 front panel. They are labeled BFL and CPU.

RST Indicator (DS1)

The yellow BFL LED indicates board failure; this indicator is also illuminated during reset as an LED test. The BFL is set if the MODFAIL Register or FUSE Register is set. Refer to the MVME5100 Single Board Computer Programmer’s Reference Guide (V5100A/PG) for information on these registers.

CPU Indicator (DS2)

The green CPU LED indicates CPU activity.

Connectors

There are three connectors on the front panel of the MVME5100. Two are bottom-labeled 10/100BASE T and one is labeled DEBUG.

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