Motorola 68020
The Motorola 68020 (P/N 156–2515–04) is a 32-bit microprocessor monolithic integrated circuit based on the Motorola 68000 architecture, introduced in 1984.
Unlike the earlier 68000-family CPUs, the 68020 has 32-bit internal and external data and address buses and a 32-bit ALU. It was produced with clock speed ratings from 12 MHz to 33 MHz.
Compared to the predecessors, the 68020 adds extra instructions and additional addressing modes, pipelining, a 256-byte direct-mapped instruction cache, and support for non-aligned memory accesses. It also features an asynchronous coprocessor interface supporting up to eight coprocessors, such as floating point units (MC68881 or MC68882) or a paged memory management unit (MC68851).
The lower-cost 68EC020 version has a 24-bit external address bus.
Links
- Motorola 68020 @ Wikipedia
Used in
Some instruments using part Motorola 68020
| Instrument | Manufacturer | Class | Model | Description | Introduced |
|---|---|---|---|---|---|
| 4224 | Tektronix | Terminal | 4224 | 16" or 19" Color graphics terminal | 1988 |
| 4225 | Tektronix | Terminal | 4225 | 16" or 19" Color graphics terminal | 1988 |
| 4325 | Tektronix | Terminal | 4325 | 16" or 19" Color graphics workstation | 1988 |
| TDS420 | Tektronix | Oscilloscope | TDS430 | 150 MHz 4-ch digital scope | 1991 |
| TDS460 | Tektronix | Oscilloscope | TDS460 | 400 MHz, 100 MS/s portable digital scope | 1991 |
| TDS520 | Tektronix | Oscilloscope | TDS520 | 500 MHz / 500 MS/s digital scope | 1991 |
Part numbers
- 156–2515–04 MC68020RP16E IC,PROCESSOR:CMOS,MICROPROCESSOR,32–BIT,16MHZ,68020,PPGA114
Supported by
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Pictures
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MC68020RC16B
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MC68020RC16B
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MC68020RC20E
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MC68020RC20E
