Coherent data word transfer by an asynchronous gateway data port
US4644569A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 6, 1984 |
| Grant date | Feb 17, 1987 |
| Priority date | — |
| Expiry date | Aug 6, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F13/4269
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A gateway data port for coherently transferring multiple-bit input data words in series as part of an input data chain onto an input data line that serially connects the gateway data port and other data ports to a receiver and for coherently transferring multiple-bit output data words from an output data line that serially connects the gateway data port and other data ports to a transmitter. The input data words are provided to the gateway data port asynchronously with the transfer onto the input data line; and the output data words are transmitted over the output data line as part of an output data chain to the gateway data port asynchronously with the transfer from the output data line. The input data words are transferred coherently through an asynchronous receiver and a buffer into an input data shift register, which includes a serial block of adjacent input data register stages defining a plurality of data word bit positions in the input data chain. An "input data present" bit register stage and an "input break" bit register stage are connected in series with the input data register stages and respectively define an input data present bit position and an input break bit positi…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.