TS68020MR20

Overview

The TS68020MR20 is a high-performance 32-bit microprocessor from the TS68000 family, manufactured by Microchip Technology using HCMOS technology. It features a full 32-bit architecture with 32-bit registers and data paths, supporting a 4-Gbyte direct addressing range. The device includes an on-chip instruction cache to improve bus bandwidth and operates at clock frequencies up to 20 MHz. It utilizes a pipelined architecture for internal parallelism and supports dynamic bus sizing for 8-, 16-, and 32-bit peripherals. The processor is housed in a 114-pin Ceramic Pin Grid Array (PGA) package.

Feature Summary

• Object code compatible with earlier TS68000 microprocessors while providing enhanced addressing modes for high-level languages.
• Integrated on-chip instruction cache that accelerates execution speed and improves overall bus bandwidth efficiency.
• Pipelined architecture enabling high degrees of internal parallelism and concurrent instruction execution.
• Co-processor interface designed for connection to companion 32-bit peripherals such as floating-point units.

Applications

• Video graphics applications utilizing new bit field data types for accelerated processing.
• Systems requiring virtual memory support and virtual machine capabilities.
• High-performance embedded control environments needing asynchronous bus operations.
• Complex computing tasks benefiting from extended addressing modes and rich instruction sets.

Procurement Notes

Verify the specific suffix 'MR' corresponds to the required operating temperature range and screening level against the official datasheet. Confirm compliance with MIL-STD-883 Class B or DESC 5962 standards if specified for the application. Ensure the ceramic PGA package matches the mechanical constraints of the target design.

Selection Notes

Select this component when a full 32-bit implementation of the 68000 family is required with integrated caching. Consider the 20 MHz speed grade for timing requirements. Evaluate the 114-pin PGA package for socket compatibility. Verify power supply stability for the 5.0 VDC requirement and thermal management needs for the ceramic package.

Part Context

This microprocessor represents the evolution of the TS68000 family from 16-bit to full 32-bit architecture. It maintains backward compatibility while introducing 32-bit data paths and addressing. The device integrates approximately 190,000 transistors and is designed for low power consumption relative to its performance class, suitable for demanding computational tasks.

Replacement Considerations

Check for other speed grades within the TS68020 series, such as 16.67 MHz or 25 MHz variants, which share functional compatibility but differ in timing specifications. Verify package options like the CQFP variant if pin grid array mounting is not feasible.

FAQ

What is the primary benefit of the on-chip instruction cache?

The on-chip instruction cache speeds up instruction execution and improves bus bandwidth by reducing the need to fetch instructions from external memory repeatedly.

How does the TS68020 support virtual memory?

It provides full support for virtual memory and virtual machines through dedicated control registers and addressing mechanisms that allow independent exception management for different processes.