Data strobe to data delay calibration
US9305622B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 23, 2015 |
| Grant date | Apr 5, 2016 |
| Priority date | — |
| Expiry date | Jan 23, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03L7/0814
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for performing a data strobe-to-data delay calibration is disclosed. In one embodiment, a data strobe signal, along with data, is conveyed from a memory controller to a memory. An initial delay calibration procedure may be performed to align the data and the data strobe signals at the memory, with subsequent calibrations performed there between in order to compensate for changes due to various factors such as voltage and temperature. In the calibrations performed between the delay calibration procedures, a calibrated delay value may be multiplied by a first scaling factor and a second scaling factor to generate a scaled code. A DLL configured to convey the data strobe signal may then be programmed based on this code.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.