Seiko Epson Corporation

Takeshi Terashima

Takashi Kato

A printer driver of a host computer sends as image data a command which includes full-color RGB raster data. A printer-control-only circuit formed in the form of a hardware circuit subjects the full-color RGB raster data received from the driver to color conversion, halftoning, and interlacing, thereby converting the RGB raster data into binary CMYK raster data. The printer-control-only circuit generates a printer command including as image data the binary CMYK raster data. The printer performs printing operations on the basis of the binary CMYK raster data included in the printer command from the printer-control-only circuit. Software stored in the printer driver and the printer do not perform any color conversion, halftoning, and interlacing operations.

Printer controller, and print system

An image formation system ASIC control system and method capable of selectively clearing only registers and other storage units, requiring initialization in response to the internal state and external state of an image formation system ASIC are provided. A plurality of reset signals Reset,-Reset,for clearing predetermined modules,, and,are output from a reset signal selector,&prime;. To the reset signal selector,&prime;, an internal reset request signal is input from an internal main state machine, a first external reset request signal hw is input from a first external reset request generation source,formed of ASIC external hardware, and second external reset request signals sw1, sw,, and sw,are input from a second external reset request generation source,formed of ASIC external software. The reset signal selector,&prime; ANDs or ORs the input reset requests for outputting any of the reset signals Reset,-Reset,only to the module corresponding to the reset signal.

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Nagano, Japan

Takeshi Terashima