Operation; Introduction; Switches And Indicators; Abt/Rst Switch - Motorola MVME5100 Manual

Operation

2

Introduction

This chapter provides operating instructions for the MVME5100 Single Board Computer. It
includes necessary information about powering up the system along with the functionality of the
switches, status indicators and I/O ports on the front panels of the board.

Switches and Indicators

The front panel of the MVME5100, as shown in
toggle switch
located on the front panel.

ABT/RST Switch

The
ABT/RST
function is selected, if pressed for more than 5 seconds, the
ABORT
Each function is described below.

Abort Function

When toggled to
normally used to abort program execution and return control to the debugger firmware located
in the processor and flash memory.
The interrupt signal reaches the processor via ISA bus interrupt line IRQ8. The interrupter
connected to the

Reset Function

When toggled to
must be depressed for more than five seconds.
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
up reset, or by a watchdog timeout, or by a control bit in the Miscellaneous Control Register
(MISC_CTL) in the Universe ASIC.
/ ) and two Light-Emitting Diode (LED) status indicators (
(ABT RST
switch operates in the following manner: if pressed for less than 5 seconds, the
, the switch generates an interrupt signal to the processor. The interrupt is
ABT
switch is an edge-sensitive circuit, filtered to remove switch bounce.
ABORT
, the switch resets all onboard devices. To generate a reset, the switch
RST
Figure 1-1, incorporates one dual function
RESET
switch to
ABT/RST
MVME5100 Installation and Use (V5100A/IH5)
2
)
BFL, CPU
function is selected.
, or by a power-
RST
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