Motorola user manual MVME197LE Functional Description, Data Bus Structure, MC88110 MPU

FUNCTIONAL DESCRIPTION

4

Introduction

This chapter provides a block diagram level description of the MVME197LE Single Board Computer. The functional description provides an overview of the module, followed by a detailed description of several blocks of the module. The block diagram for the MVME197LE is illustrated in Figure 4-1.

Descriptions of the other blocks of the MVME197LE module, including programmable registers in the ASICs and peripheral chips, are given in the MVME197LE, MVME197DP, and MVME197SP Single Board Computers Programmer’s Reference Guide. Refer to it for the rest of the functional description of the MVME197LE module.

MVME197LE Functional Description

The MVME197LE module is a high functionality VMEbus single board computer based on the MC88110 second generation RISC microprocessor. The MVME197LE has 32/64MB of DRAM, 1MB of FLASH memory, 128/256KB of BOOT ROM, 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, 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.

Data Bus Structure

The local data bus on the MVME197LE module is designed to accommodate the various 8-bit, 16-bit, and 32-bit devices that reside on the module. Refer to the MVME197LE, MVME197DP, and MVME197SP Single Board Computers Programmer’s Reference Guide and to the specific sections of this user’s manual for each device to determine its port size, the data bus connection, and any restrictions that apply when accessing the specific device.

MC88110 MPU

The MVME197LE is based on the MC88000 family and uses one MC88110 RISC microprocessor unit. Refer to the MC88110 Second Generation RISC Microprocessor User’s Manual for more information.

MVME197LE/D24-1