Control device and image forming apparatus with two controllers

Patent metadata

Field	Value
Publication number	US-9201623-B2
Application number	US-201414486479-A
Country	US
Kind code	B2
Filing date	Sep 15, 2014
Priority date	Jun 15, 2012
Publication date	Dec 1, 2015
Grant date	Dec 1, 2015

Abstract

A control device includes an apparatus controller that is connected to at least one apparatus and includes a first memory which stores data for controlling the driving of the apparatus and data indicating a state of the apparatus and a reading and transmitting unit which reads each data item stored in the first memory and transmits the read data, a main controller that includes a central processing unit, a second memory, and a writing unit which writes the data transmitted from the apparatus controller to the second memory, and a full-duplex serial bus that connects the main controller and the apparatus controller. The reading and transmitting unit and the writing unit operate such that each data item stored in the first memory is read, transmitted, and stored in the second memory in a cycle equal to or less than a count cycle of a system timer.

First claim

What is claimed is:

1. A control device comprising:
a first controller that is connected to at least one apparatus and includes a first memory that stores data for controlling the driving of the at least one apparatus and data indicating a state of the at least one apparatus;
a second controller that is connected to a bus of a central processing unit and includes a second memory to which data is copied from the first memory; and
a full-duplex serial bus that connects the first…

Assignees

• Fuji Xerox Co Ltd

Inventors

• Yoshida Kinichi
• Mitobe Yasuaki
• Yamagishi Shigekazu

Classifications

• G06K15/40

  Physics · mapped topic

• G06F13/24

  Physics · mapped topic

• H04N1/32587 Primary

  Electricity · mapped topic

• G06F2213/2424

  Physics · mapped topic

• G06F13/287

  Physics · mapped topic