Central processing unit for use in a microprocessor
US3969724A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 4, 1975 |
| Grant date | Jul 13, 1976 |
| Priority date | — |
| Expiry date | Apr 4, 1995 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F9/4484
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A central processing unit (CPU) is disclosed which can be used in a microprocessor and which has a relatively simple architecture enabling it to perform rapid data processing operations. The CPU has a plurality of registers, an arithmetic logic unit (ALU), and a multiplexor which selects one of the ALU operands. A relatively large scratchpad is included in the CPU to eliminate time-consuming addressing of memories outside the CPU. A parallel architecture and the ability to perform simultaneous operations also enhance the CPU speed. The CPU control unit has a read only memory (ROM) for storage of micro control instructions and a program counter capable of addressing the ROM either sequentially or in accordance with a specific address for execution of jump instructions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.