Microprocessor control circuit
US4412282A · kind A · utility
18Cited by
2References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 29, 1980 |
| Grant date | Oct 25, 1983 |
| Priority date | — |
| Expiry date | Dec 29, 2000 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04Q3/54533
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A control circuit, for use in a telephone switching system, which monitors, controls and transfers data to and from memory, input-output devices and external circuits. A microprocessor operates under control of read-only and random-access memories. It communicates with the external telephone system via bus transceivers and a programmable interrupt controller. The integrity of this circuit is monitored by high reliability data and address parity circuits.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.