68020 DATASHEET PDF

Details, datasheet, quote on part number: MC Datasheet, Download MC datasheet. Quote Related products with the same datasheet. MC datasheet, MC pdf, MC data sheet, datasheet, data sheet, pdf, Motorola, MICROPROCESSORS USERS MANUAL. MC NXP / Freescale Microprocessors – MPU datasheet, inventory, & pricing.

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Naturally, unaligned accesses were slower than aligned accesses because they required an extra memory access.

Multiprocessing support was implemented externally by the use of a RMC pin [1] to indicate an indivisible read-modify-write cycle in progress. It is further being used in the flight control and radar systems datasheef the Eurofighter Typhoon combat aircraft.

Motorola 68020

The resulting decrease in bus traffic was particularly important in systems relying heavily on DMA. The added many improvements over the including a bit arithmetic logic unit ALUbit external data and address buses, extra instructions and additional addressing modes. It is the successor to the Motorola and is succeeded by the Motorola Under the and later, this was made privileged, to better support virtualization software. The Nortel Networks DMS telephone central office switch also used the as the first microprocessor of the SuperNode computing core.

The had a small byte direct-mapped instruction cache, arranged as 64 four-byte entries. Retrieved from 668020 https: Please help improve this article by adding citations ratasheet reliable sources. Fixed branch prediction, branch-never-taken approach [15]. It is also the processor used on board TGV trains to decode signalling information which is sent to the trains through the rails.

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The has a coprocessor interface supporting up to eight coprocessors. The main CPU recognizes “F-line” instructions with the four most significant opcode bits all oneand uses special bus cycles to interact with a coprocessor to execute these instructions. In other projects Wikimedia Commons.

MC Datasheet(PDF) – Motorola, Inc

The had bit internal and external data and address buses, compared to the early x0 models with bit data and bit address buses. Unsourced material may be challenged and removed. The new addressing modes added scaled indexing and another level of indirection to many of the pre-existing modes, and added quite a bit of flexibility to 680020 indexing modes and operations.

The previous and processors could only access word bit and long word bit data in memory if it were word-aligned located at an even address. PGA pins used It also found use in laser printers.

MC Datasheet pdf – MICROPROCESSORS USERS MANUAL – Motorola

Newer packaging methods allowed the ‘ to feature more external pins without the large size that the earlier dual in-line package method required. This article needs additional citations for verification. The HP, and also use thetogether with a math coprocessor. The 68EC lowered cost through a bit address bus. In keeping with naming practices common to Motorola designs, the is usually referred to as the “”, pronounced “oh-two-oh” or “oh-twenty”.

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The replaced this with a proper instruction cache of bytes, the first 68k series processor to feature true on-chip cache memory. November Learn how and when to remove this template message. The had no alignment restrictions on data access. Although small, it still made a significant difference in the performance of many applications. A lower cost version was also made available, known as the 68EC Fundamentals of Digital Logic and Microcomputer Design.

Though the had a “loop mode”, which sped loops through what was effectively a tiny instruction cache, it held only two short instructions and was thus little used.

The and had a proper three-stage pipeline. By using this site, you agree to the Terms of Use and Privacy Policy. For more information on the instructions and architecture see Motorola The 68EC is a lower cost version of the Motorola The Motorola ” sixty-eight-oh-twenty “, ” sixty-eight-oh-two-oh ” or ” six-eight-oh-two-oh ” is a bit microprocessor from Motorolareleased in The ‘s ALU was also natively bit, so could perform bit operations in one clock, whereas the took two clocks minimum due to its bit ALU.

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Views Read Edit View history. The UX shipped with Amiga Unix, requiring an ‘ or ‘ processor.

Motorola-Freescale-NXP processors and microcontrollers.