Functional Description; Introduction; Mvme162 Functional Description; Data Bus Structure - Emerson Motorola MVME162 User Manual

Introduction

This chapter describes the MVME162 Embedded Controller on a block
diagram level. The Functional Description provides an overview of the
MVME162, followed by a detailed description of several blocks of MVME162
circuitry. Figure 4-1 shows a block diagram of the MVME162 main module.
Figure 4-2 shows a block diagram of the parity DRAM mezzanine module.
Descriptions of other MVME162 blocks, including programmable registers in
the ASICs and peripheral chips, are given in the MVME162 Embedded
Controller Programmer's Reference Guide. Refer to it for the rest of the functional
description of the MVME162.

MVME162 Functional Description

The MVME162 is a high-functionality VMEbus single board computer
designed around the MC68040/MC68LC040 chip. It has 1MB, 4MB, or 8MB of
DRAM, 512KB of SRAM, 1MB Flash memory, four MVIP IndustryPack
interfaces, and two serial ports (one EIA-232-D DCE; one EIA-232-D or EIA-
530 DCE/DTE). Options include an SCSI mass storage interface, a LAN
Ethernet transceiver interface, and a non-VMEbus version.

Data Bus Structure

The local data bus on the MVME162 is a 32-bit synchronous bus that is based
on the MC68040 bus, and which supports burst transfers and snooping. The
various local bus master and slave devices use the local bus to communicate.
The local bus is arbitrated by priority type arbiter and the priority of the local
bus masters from highest to lowest is: 82596CA LAN, NCR 53C710 SCSI,
VMEbus, and MPU. Generally speaking, any master can access any slave;
however, not all combinations pass the common sense test. Refer to the
MVME162 Embedded Controller Programmer's Reference Guide and to the user's
guide for each device to determine its port size, data bus connection, and any
restrictions that apply when accessing the device.
MVME162/D24-1
FUNCTIONAL
DESCRIPTION
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