6 Modifying the Environment

Note

Note

ROM First Access Length (0 - 31) = 10?

This is the value programmed into the “ROMFAL” field (Memory Control Configuration Register 8: bits 23-27) to indicate the number of clock cycles used in accessing the ROM. The lowest allowable ROMFAL setting is $00; the highest allowable is $1F. The value to enter depends on processor speed; refer to Chapter 1 or Appendix B for appropriate values. The default value varies according to the system’s bus clock speed.

ROM First Access Length is not applicable to the PrPMC800/800ET. The configured value is ignored by PPCBug.

ROM Next Access Length (0 - 15) = 0?

The value programmed into the “ROMNAL” field (Memory Control Configuration Register 8: bits 28-31) to represent wait states in access time for nibble (or burst) mode ROM accesses. The lowest allowable ROMNAL setting is $0; the highest allowable is $F. The value to enter depends on processor speed; refer to Chapter 1, Preparation and Installation or Appendix B, Thermal Validation for appropriate values. The default value varies according to the system’s bus clock speed.

ROM Next Access Length is not applicable to the PrPMC800/800ET. The configured value is ignored by PPCBug.

DRAM Parity Enable [On-Detection/Always/Never - O/A/N] = O?

ODRAM parity is enabled upon detection. (Default)

ADRAM parity is always enabled.

NDRAM parity is never enabled.

Note This parameter (above) also applies to enabling ECC for DRAM.

L2 Cache Parity Enable [On-Detection/Always/Never - O/A/N] = O?

OL2 Cache parity is enabled upon detection. (Default)

AL2 Cache parity is always enabled.

NL2 Cache parity is never enabled.

PCI Interrupts Route Control Registers (PIRQ0/1/2/3) = 0A0B0E0F?

Initializes the PIRQx (PCI Interrupts) route control registers in the IBC (PCI/ISA bus bridge controller). The ENV parameter is a 32-bit value that is divided by 4 to yield the values for route control registers PIRQ0/1/2/3. The default is determined by system type.

Note

LED/Serial Startup Diagnostic Codes: these codes can be displayed at key

 

 

points in the initialization of the hardware devices. Should the debugger fail

 

 

to come up to a prompt, the last code displayed will indicate how far the

 

 

initialization sequence had progressed before stalling. Due to limitations

 

 

 

 

 

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

55

Page 75
Image 75
Motorola PrPMC800/800ET Processor PMC Module, PRPMC800A/IH5 manual ROM First Access Length 0 31 = 10?

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.