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Image forming apparatus

A technology for image and configuration registers, applied in image communication, instrumentation, error detection/correction, etc., can solve problems such as the absence of automatic recovery components

Inactive Publication Date: 2013-07-31
SHARP KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0017] As mentioned above, in conventional devices, when the value in CONREG is corrupted and as a result the link is broken preventing data communication, there is no automatic recovery feature, and it is therefore necessary to power cycle the device or reset the device ( manually press the reset button)

Method used

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Examples

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Embodiment Construction

[0027] In the image forming apparatus, each of the plurality of equipment modules includes: a subordinate data transmission part for transmitting data to and receiving data from the control module through the PCI fast interface; and a configuration register configured in the control module. The link between the module and the device module is set up to store the register information required for data transmission and reception.

[0028] In the image forming apparatus, the control module includes a storage section for storing initial values ​​of registers required to establish a link between the control module and each device module, and the link checking section relies on the main data transmission Partially acquire the register information stored in the configuration register of the first device module; compare the acquired register information with the initial value of the register stored in the storage part; and determine that the state of the link is normal when the registe...

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Abstract

An image forming apparatus has a plurality of device modules for executing predetermined functions; and a control module for controlling operation of the device modules. The control module comprises an initialization section for establishing a link; a master data transfer section for transferring data to a device module; and a link checking section for checking the state of the link. When a request for data transfer to a first device module out of the plurality of device modules is made, the link checking section checks the state of the link between the control module and the first device module. When the state of the link checked is determined to be abnormal, the initialization section establishes the link between the control module and the first device module, and then the master data transfer section transfers the data requested to be transferred to the first device module.

Description

technical field [0001] The present invention relates to an image forming apparatus. More specifically, the present invention relates to an image forming apparatus having a function of restoring a link established between modules for realizing functions of the image forming apparatus when an error occurs in the link. Background technique [0002] In image forming devices such as digital copiers and digital multifunction printers (MFPs), parallel interfaces represented by PCI (Peripheral Component Interconnect) have been used to connect devices such as CPUs, image processing modules, and Components of memory devices. [0003] However, the parallel interface has some problems such as race conditions and clock skew, and its transmission rate is insufficient for high-speed and high-quality image forming apparatuses. Therefore, recently, a PCI Express interface (PCI Express interface, hereinafter referred to as PCIe), which is a high-speed serial interface, has been proposed for...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N1/00
CPCG06F11/1443G06F11/2221G06F11/2007
Inventor 木下浩树
Owner SHARP KK
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