Bus state control circuit
US4772888A · kind A · utility
37Cited by
4References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 21, 1986 |
| Grant date | Sep 20, 1988 |
| Priority date | — |
| Expiry date | Aug 21, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F13/10
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A bus state control circuit controls the access operation on the basis of access request signals supplied thereto. The access of an input-output device starts after a predetermined time interval in the case when a previous access was made to the input-output device, while it starts immediately in the case when the previous access was made to a main memory device or when such access was made to the input-output device or such access was made to the input-output device but a predetermined time has passed at a point in time when the access request signal indicates the access of the input-output device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.