Interface port for electrically programmed fuses in a programmable logic device
US7550324B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 15, 2007 |
| Grant date | Jun 23, 2009 |
| Priority date | — |
| Expiry date | Feb 4, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K19/17768
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A programmable logic device (PLD) includes electrically programmable fuses that may be programmed with an identifier of the PLD. The PLD also includes programmable tiles and an interface port that is coupled to a shift register and a subset of the programmable tiles. The interface port includes a control port and a first and second serial data signals. The shift register has a parallel input port to load the identifier from the set of electrically programmable fuses in response to a read command of the control port. The shift register serially shifts by one bit in response to a shift command of the control port, including shifting a bit from the subset of the programmable tiles to the shift register via the first serial data signal and shifting a bit from the shift register to the subset of the programmable tiles via the second serial data signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.