3 Functional Description

Processor

The PrPMC800/800ET board can be ordered with one of the following low-power/low care voltage processor chips: 450 MHz MPC750-class, 450MHz or 500MHz MCP7410, or a 400 MHz MPC7410 (N).

L2 Cache

The PrPMC800/800ET utilizes a backside L2 cache structure via the MPC750-class or MPC7410 processor chip families. The L2 cache is implemented with an on-chip, 2-way set- associative tag memory and external direct-mapped synchronous SRAMs for data storage. The external SRAMs are accessed through a dedicated 72-bit wide (64 bits of data and 8 bits of parity) L2 cache port. The MPC750-class processors support up to 1MB of L2 cache SRAMs. The MPC7410 processor can support up to 2MB. The L2 cache can operate in copyback or write-through modes and supports system cache coherency through snooping. Data parity generation and checking can be disabled by programming the processor’s L2 cache control register accordingly. The MPC7410 processor also supports direct mapping of the SRAM memory, in conjunction with normal L2 cache operation. In this mode, a portion of the SRAM memory space may be mapped to appear as a private memory space in the memory map. Refer to the processor data sheet for additional information.

The L2 cache data SRAM for the PrPMC800/800ET is implemented using two 128K x 36 or 256K x 36 synchronous pipelined burst SRAMs providing a total of 1MB or 2MB of L2 cache, depending on the board version.

Harrier System Memory Controller / PCI Host Bridge ASIC

The Harrier ASIC provides the bridge function between the PPC60x bus, the system memory, and the PCI Local Bus. The Harrier ASIC incorporates the following key features:

–100 MHz PowerPC-compatible bus interface

–SDRAM interface supporting up to eight banks of 512MB each, with ECC

–32/64-bit REV2.1 compliant PCI bus interface capable of running up to 66 MHz

–Single channel DMA controller

–Message passing unit supporting I2O and generic functions

–Two internal 16550-type UARTs

–Two I2C bus master interfaces

–MPIC compliant interrupt controller

–Four Xport channels for interfacing to flash or other external registers/devices

Refer to the Harrier Programmer’s Guide for additional information and programming details.

16PrPMC800/800ET Processor PMC Module Installation and Use (PrPMC800A/IH5)

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Motorola PRPMC800A/IH5 manual Processor, L2 Cache, Harrier System Memory Controller / PCI Host Bridge Asic
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PRPMC800A/IH5, PrPMC800/800ET Processor PMC Module specifications

The Motorola PrPMC800/800ET Processor PMC Module, specifically the PRPMC800A/IH5 variant, represents a significant advancement in embedded processing technology. Often utilized in telecommunications, aerospace, and defense applications, this PMC module is designed to provide robust performance in demanding environments, making it suitable for high-speed data processing and communication tasks.

At the core of the PrPMC800 module is the PowerPC 750 architecture, known for its efficiency and power management capabilities. This 32-bit RISC processor is clocked at speeds reaching up to 800 MHz, allowing it to handle complex computations and multitasking scenarios effectively. The processor architecture supports a variety of software environments, including real-time operating systems and VxWorks, which enhances its adaptability across diverse applications.

One of the standout features of the PRPMC800A/IH5 module is its memory capacity. The module supports up to 1 GB of SDRAM, offering ample space for processing large datasets and executing multiple applications simultaneously. Furthermore, the integrated PCI bus facilitates high-speed connectivity with other modules and components in the system, ensuring rapid data transfer rates essential for real-time processing tasks.

An important characteristic of the PrPMC800 module is its thermal and environmental resilience. Designed with military-grade standards, it operates reliably in extreme conditions, including high temperatures and vibrations. This makes it particularly suitable for rugged applications where standard commercial-grade processors may fail.

The module also incorporates advanced I/O capabilities, featuring dual Gigabit Ethernet ports which enhance networking performance. Additional serial ports and interrupt handling further improve the module's versatility, allowing it to interface seamlessly with various peripheral devices and systems.

In summary, the Motorola PrPMC800/800ET Processor PMC Module, represented by the PRPMC800A/IH5 model, is an exemplary solution for applications requiring high performance, reliability, and adaptability. With its powerful PowerPC architecture, generous memory capacity, robust I/O capabilities, and proven ruggedness, this processor module stands out as a preferred choice for engineers and developers working in critical industries.
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