Personal Computer User Manual

MVME197LEIG/D11-1

BOARD LEVEL

HARDWARE DESCRIPTION

Introduction

This chapter describes the board level hardware features of the MVME197LE

Single Board Computer. The chapter is organized with a board level overview

and features listed in this introduction, followed by a more detailed hardware

functional description. Front panel switches and indicators are included in the

detailed hardware functional description. This chapter closes with some

general memory maps.

All programmable registers in the MVME197LE module reside in ASICs

(Application-Specific Integrated Circuits) that are covered in the

MVME197LE, MVME197DP, and MVME197SP Single Board Computers

Programmer’s Reference Guide.

Overview

The MVME197LE module is a double-high VMEmodule based on the

MC88110 RISC microprocessor. The MVME197LE has 32/64MB of DRAM,

1MB of flash memory, 8KB of static RAM (with battery backup), a time of day

clock (with battery backup), an Ethernet transceiver interface, four serial ports

with EIA-232-D interface, six tick timers, a watchdog timer, 128KB of BOOT

ROM, a SCSI bus interface with DMA (Direct Memory Access), a Centronics

printer port, an A16/A24/A32/D8/D16/D32 VMEbus master/slave

interface, and a VMEbus system controller.

Input/Output (I/O) signals are routed through the MVME197LE’s backplane

connector P2. A P2 Adapter Board or LCP2 Adapter board routes the signals

and grounds from connector P2 to an MVME712 series transition module. The

MVME197LE supports the MVME712M, MVME712A, MVME712AM, and

MVME712B transition boards (referred to here as the MVME712X, unless

separately specified). The MVME197LE also supports the MVME712-12 and

MVME712-13 (referred to as the MVME712-XX, unless separately specified).

These transition boards provide configuration headers, serial port drivers, and

industry standard connectors for the I/O devices.

The MVME197LE modules have eight ASICs (described in the following

order: BusSwitch, DCAM, ECDM, PCC2, and VME2).