Technical data

2-1

2Startup and Operation

Introduction

This chapter provides information on powering up the MVME172LX

VME Embedded Controller after its installation in a system, and describes

the functionality of the switches, status indicators, and I/O ports.

For programming information, consult the MVME172 Embedded

Controller Programmer’s Reference Guide.

Front Panel Switches and Indicators

There are two switches (ABORT and RESET) and four LED (light-emitting

diode) status indicators (

FAIL, RUN, SCON and FUSES) located on the

MVME172LX front panel.

Table 2-1. MVME172LX Front Panel Controls

Control/Indicator Function

Abort Switch (

ABORT) Sends an interrupt signal to the processor. The interrupt is normally

used to abort program execution and return control to the debugger

firmware located in the MVME172LX Flash memory.

The interrupter connected to the ABT switch is an edge-sensitive

circuit, filtered to remove switch bounce.

Reset Switch (

RESET) Resets all onboard devices. Also drives a SYSRESET* signal if the

MVME172LX is system controller. SYSRESET* signals may be

generated by the Reset switch, a power-up reset, a watchdog timeout,

or by a control bit in the Local Control/Status Register (LCSR) in the

VMEchip2 ASIC. For further details, refer to Chapter 4, Functional

Description.