3 Functional Description

EREADY Signal

The Processor PMC PCI bus Enumeration Ready (EREADY) signal is connected to the Harrier EREADY pin. Harrier can drive this open drain signal and monitor its state using the Harrier EREADY and EREADYS status bits. This pin is asserted low by Harrier at power-up and must be deasserted by software control.

PCI Signaling Voltage Level

The PrPMC800/800ET module is a universal PMC module that will operate with +3.3V or +5V PCI signaling levels. The Harrier PCI I/O buffers operate at +3.3V output levels and are 5V tolerant allowing the PCI interface to operate at either voltage level. The one exception is the PCI CLK input. This is a +3.3V “only” input, which is not +5V tolerant. The PCI clock input signal is a +3.3V only input.

Debug Header

A 2mm, 20-pin right-angle header located on side one of the PrPMC800/800ET provides the interface to the async serial port, the processor JTAG/COP port, along with the RESET# and ABORT# signals. The serial port and JTAG/COP interfaces, along with the ABORT_L signal, are also routed to the PMC P14 connector for host board access.

ABORT# and RESET# Signals

The debug header provides ABORT# and RESET# inputs for debug purposes. The ABORT# signal is connected to the Harrier Abort Switch (ABTSW_L) input and generates an MPIC internal interrupt. The RESET# signal is connected to the Harrier Reset Switch (RSTSW_L) input that generates a Harrier Reset Out. Each signal is debounced in the Harrier ASIC.

Harrier Power-Up Configuration Header

A 2mm, 16-pin low profile header, locate on side one of the module provides the means to change some of the Harrier power-up configuration settings. See Table 4-7 on page 37 for configuration settings controlled by this header. A 2-mm shunt must be installed to change a setting. The default configuration setting (with the shunt not installed) is also given in Table 4-7. Refer to Table 4-7for the header pin assignments as well.

On-Board LEDs

The PrPMC800/800ET module provides two LEDs mounted on side two of the module for status of the CPU and the board fail pin:

The green CPU LED is lit when the DBB# signal of the processor bus is active (hardware controlled)

The yellow FAIL LED is lit when the Harrier Board Fail bit (BDFL) in the Miscellaneous Control and Status register is active (software controlled)

Refer to the Harrier ASIC Programmer’s Reference Guide for details of the Miscellaneous Control and Status register.

26PrPMC800/800ET Processor PMC Module Installation and Use (PrPMC800A/IH5)

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Motorola PRPMC800A/IH5 Debug Header, On-Board LEDs, Eready Signal, PCI Signaling Voltage Level, ABORT# and RESET# Signals

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.