Print engine drive interface

Details Print engine drive interface Print engine drive interface

G - Physics

06

F

354/236.1

G06F 3/12 (2006.01) G06K 15/00 (2006.01)

Patent

CA 1286418

ABSTRACT OF THE DISCLOSURE A print engine data interface for serially retrieving the pixel-image data from a full page bit map and transferring the data to a print engine comprises a set of command and data registers for storing programmed page format and scan length data, a scan offset adjustment circuit adapted to receive the page format and scan length data from the command and data registers, a refresh and read/write arbitration circuit adapted to detect if the full page bit map is being written to, or read from or refreshed, and to repeatedly generate a refresh signal when a portion of the full page bit map is not being written to or read from, a bit map sequencer responsive to the refresh and read/write arbitration circuit for generating either read/write or refresh commands to an address within the full page bit map memory, a bit map address counter responsive to the bit map sequencer and scan offset adjustment circuit for pointing to an address in the full page bit map memory so the data the address can be retrieved, and a data conversion circuit for accepting the data retrieved from the full page bit map memory and converting it into a serial data stream from synchronous reception by the print engine.

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