Data transfer system for transferring data from a data transmission apparatus to a data reception apparatus via a parallel interface, and data transfer system for printer using this data transfer system

摘要

A data transfer system uses a Centronics compatible parallel interface having a plurality of control signal lines to transfer signals, such as Auto Feed, Select In, PError, nFault, Select and Strobe, and a data line for parallel transfer of data having a predetermined bit width, and starts high-speed data transfer at the timing of a change in level of the signal Auto Feed, Select In, PErrot, nFault, Select or Strobe. In the high-speed data transfer mode, the data transfer system transfers data in parallel to the printer at the time when the signal Strobe changes its level.