Flexible register-based I/O microcontroller with single cycle instruction execution
US5274770A · kind A · utility
22Cited by
6References
5Claims
0Family size
Assignee
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Key dates
| Filing date | Jul 29, 1992 |
| Grant date | Dec 28, 1993 |
| Priority date | — |
| Expiry date | Jul 29, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F13/126
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A new controller transfers data directly between the register of an I/O port and an ALU register in an operation that takes only one phase of a two-phase clock cycle. A transfer between an ALU register and main memory is also performed in one phase, and the entire transfer can be accomplished in one clock cycle. A connection is also provided between the ALU registers and the flag register, and when the incoming byte is a status byte, the controller can transfer the byte to the flag register where it can control the next instruction execution.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.