Description

The RP2596-5.0 is an electronic component model categorized as IC Chips. It is the first full 32-bit implementation of the M68000 family of microprocessors from Motorola. Using VLSI technology, the RP2596-5.0 is implemented with 32-bit registers and data paths, 32-bit addresses, a rich instruction set, and versatile addressing modes. It is object-code compatible with earlier members of the M68000 family and has the added features of new addressing modes in support of high-level languages, an on-chip instruction cache, and a flexible coprocessor interface with full IEEE floating-point support (the MC68881 and MC68882). The internal operations of this microprocessor operate in parallel, allowing multiple instructions to be executed concurrently. The asynchronous bus structure of the RP2596-5.0 uses a nonmultiplexed bus with 32 bits of address and 32 bits of data. The processor supports a dynamic bus sizing mechanism that allows the processor to transfer operands to or from external devices while automatically determining device port size on a cycle-by-cycle basis. The dynamic bus interface allows access to devices of differing data bus widths, in addition to eliminating all data alignment restrictions.

Specifications and features

The main specifications and features of the RP2596-5.0 are as follows:
• Object-Code Compatible with Earlier M68000 Microprocessors
• Addressing Mode Extensions for Enhanced Support of High-Level Languages
• New Bit Field Data Type Accelerates Bit-Oriented Applications—e.g., Video Graphics
• An On-Chip Instruction Cache for Faster Instruction Execution
• Coprocessor Interface to Companion 32-Bit Peripherals—the MC68881 and
MC68882 Floating-Point Coprocessors and the MC68851 Paged Memory
Management Unit
• Pipelined Architecture with High Degree of Internal Parallelism Allowing Multiple
Instructions To Be Executed Concurrently
• High-Performance Asynchronous Bus Is Nonmultiplexed and Full 32 Bits
• Dynamic Bus Sizing Efficiently Supports 8-/16-/32-Bit Memories and Peripherals
• Full Support of Virtual Memory and Virtual Machine
• Sixteen 32-Bit General-Purpose Data and Address Registers
• Two 32-Bit Supervisor Stack Pointers and Five Special-Purpose Control Registers
• Eighteen Addressing Modes and Seven Data Types
• 4-Gbyte Direct Addressing Range for the MC68020
• 16-Mbyte Direct Addressing Range for the MC68EC020
• Selection of Processor Speeds for the MC68020: 16.67, 20, 25, and 33.33 MHz
• Selection of Processor Speeds for the MCEC68020: 16.67 and 25 MHz

Application Scenarios

The RP2596-5.0 is widely used in various electronic devices and systems that require advanced processing capabilities, such as computer systems, embedded systems, industrial automation, and communication systems.

Comparison

- Object-code compatible with earlier M68000 microprocessors
- Versatile addressing modes for enhanced support of high-level languages
- On-chip instruction cache for faster instruction execution
- Coprocessor interface for floating-point support
- High-performance asynchronous bus for efficient data transfer
- Dynamic bus sizing for compatibility with different devices
- Full support of virtual memory and virtual machine
- Multiple general-purpose data and address registers for flexibility
- Wide addressing range for improved memory access
- Selection of processor speeds for customization

- Limited direct addressing range for the MC68EC020 model
- Limited processor speed options compared to other models