Emerson / Motorola PM604 Processor Module

The Emerson/Motorola PM604 is a VMEbus processor mezzanine module built on the PowerPC 604™ microprocessor architecture, designed for industrial, military, and aerospace control systems. It integrates 32-bit processing, configurable memory expansion, and PCI-based connectivity to serve as a core computing element within MVME3600 and MVME4600 host platforms.

Technical Specifications Processor

PowerPC 604™ microprocessor core

32-bit or 64-bit architecture

Clock speeds: 133 MHz, 200 MHz; up to 400 MHz for 604e variants

Internal clock multiplier: 1x, 1.5x, 2x, and 3x SYSCLK

On-chip cache: 32 KB (16 KB instruction, 16 KB data) Memory

Flash: 1 MB onboard (150 ns access, two 512K × 8 banks), programmable

DRAM: Up to 64 MB onboard ECC or up to 1 GB via mezzanine expansion modules (RAM104, RAM201)

Memory organization: Two independent banks with 8-4-4-4 read/write burst support

No interleaving Interfaces & Connectors

64-bit PCI connection to base I/O modules

Separate PCI connector for expansion carriers (Motorola PMCspan compatible)

VME64 environment operation

Mezzanine connectors for memory expansion modules

IEEE P1386.1 compatible PMC expansion slots (related architectures) Bus & Control

MPC105 bridge/memory controller

External bus frequency: up to 66 MHz

PCI frequency support specified

Key Features

Modular mezzanine design for processor and memory upgrades

Configurable clock multiplier enables flexible timing in host systems

Dual-bank DRAM organization supports burst operations

Optional ECC protection for applications

On-board Flash programmability for firmware storage

Typical Applications Industrial process control, military systems integration, aerospace data handling, and complex monitoring architectures requiring PowerPC performance with memory scalability.

Compatibility & Integration Plugs into MVME160x Single Board Computers. Mates with MVME3600 and MVME4600 base I/O modules to form complete board-level computer systems. Optional transition modules (MVME760, MVME712M) enable peripheral connectivity.