Apparatus and method for restricted range memory calibration
US9691470B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 21, 2016 |
| Grant date | Jun 27, 2017 |
| Priority date | — |
| Expiry date | Jun 21, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C29/50012
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An apparatus and method for a restricted range calibration is disclosed. A system includes a memory coupled to a memory controller. The memory controller is coupled to receive a clock signal, and is configured to operate in different performance states corresponding to different frequencies of the clock signal. The memory controller provides a data strobe signal to synchronize transfers of data to and from the memory. When operating in a first performance state, the memory controller may perform a first calibration of a delay applied to the data strobe signal. Performing the first calibration includes varying the delay over a first range of values. Thereafter, responsive to returning to the first performance state from another performance state, the memory controller may perform a second calibration. The second calibration includes varying the delay over a second range of values that is less than the first range.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.