Method for interfacing electrical signals transmitted between an

Details Method for interfacing electrical signals transmitted between an Method for interfacing electrical signals transmitted between an

1995-11-07

1997-12-30

Mancuso, Joseph

395113, G06F 1500

Patent

active

057040230

ABSTRACT:
A method for interfacing electrical signals transmitted between an engine controller and a video controller through first and second transmission lines in an image forming apparatus includes the steps of: transmitting first data indicating an engine power ready state from the engine controller to the video controller through the first transmission line when power is initially supplied to the engine controller, transmitting second data representive of a print ready state from the engine controller to the video controller through the first transmission line after performing a warm up operation on the image forming apparatus, transmitting third data representing commencement of a printing operation from the video controller to the engine controller through the second transmission line in response to an input of printing data to the video controller from an external source, transmitting fourth data representative of a request for page synchronization information from the engine controller to the video controller through the first transmission line in response to receipt of the third data by the engine controller, and transmitting fifth data representative of the page synchronization information from the video controller to the engine controller through the second transmission line in response to receipt of the fourth data by the video controller. The engine controller performs the printing operation in response to the fifth data.

REFERENCES:
patent: 5157761 (1992-10-01), Hawkes
patent: 5287020 (1994-02-01), Kimura et al.
patent: 5430554 (1995-07-01), Konakai
patent: 5455603 (1995-10-01), Hori et al.
patent: 5511149 (1996-04-01), Hayano
patent: 5528346 (1996-06-01), Kim et al.
patent: 5610724 (1997-03-01), Kaneuo et al.

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