Externally clocked electrical fuse programming with asynchronous fuse selection
US7031218B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 17, 2003 |
| Grant date | Apr 18, 2006 |
| Priority date | — |
| Expiry date | May 6, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C19/00
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Embodiments are provided in which a method and an apparatus for sequentially programming electrical fuses are described. A fuse pointer is advanced to point to (i.e., select) the fuses sequentially. When the fuse pointer reaches (i.e., points to) a fuse that is not to be blown, the fuse pointer automatically and asynchronously (e.g. not synchronized to a programming clock signal) skips the fuse. On the other hand, when the fuse pointer reaches a fuse that is to be blown, the fuse pointer stops and the fuse is blown synchronously (e.g., in response to the programming clock signal). After the blow, the fuse pointer advances to the next fuse and the process described above repeats, until the last fuse is programmed. A fuse latch circuit associated with the blown fuse may be optionally reset prior to advancing the fuse pointer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.