Register access control among multiple devices
US9858222B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 13, 2014 |
| Grant date | Jan 2, 2018 |
| Priority date | — |
| Expiry date | Apr 9, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F13/4282
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A circuit manages and controls access requests to a register, such as a control and status register (CSR) among a number of devices. In particular, the circuit selectively forwards or suspends off-chip access requests and forwards on-chip access requests independent of the status of off-chip requests. The circuit receives access requests at a plurality of buses, one or more of which can be dedicated to exclusively on-chip requests and/or exclusively off-chip requests. Based on the completion status of previous off-chip access requests, further off-chip access requests are selectively forwarded or suspended, while on-chip access request are sent independently of off-chip request status.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.