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Device controller

A device controller and device technology, applied in the direction of instrumentation, electrical digital data processing, etc., can solve problems such as poor conditions and inability to realize multi-function, and achieve the effect of smooth and smooth communication

Inactive Publication Date: 2005-01-12
WORKBIT CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, in the prior art including the technology described in JP-A-11-288400, only the target device can be controlled by the PCI bridge device, so for example, the primary device is connected to the secondary side of the PCI bridge device In this case, when the master device operates as an initiator (initiator), there is a problem that an operational problem occurs
That is, in the prior art, when the host device (initiator) is installed on the PCI add-on board, multi-function cannot be realized

Method used

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Embodiment Construction

[0026] The PCI device controller of the embodiment of the device controller of the present invention will be described below using the drawings. Furthermore, in this embodiment, the device controller of the present invention is used as a PCI device controller, but it is also possible to use the device controller of the present invention as a card device controller in the same way.

[0027] Usually, in the PCI add-on board, the state of installing the PCI device corresponding to the purpose becomes the object of processing, but among users, there are also designs for the PCI device by themselves, so that the PCI add-on board has a PCI device with desired functions (general-purpose LSI). ), users who make PCI add-on boards according to the purpose of use.

[0028] The PCI device controller of the present embodiment (hereinafter referred to as the device controller) is mainly used by the user who makes the PCI add-in board and the businessman (vendor) of the PCI add-in board as m...

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Abstract

A device controller is used for controlling PCI devices or card devices on an add-inboard. To install multiple devices including a master device on the add-in board, and to build a multifunction PCI device or card device by smoothly controlling their operation, a device controller ( 1 ) is provided with a bus arbiter circuit ( 17 ) for handling bus mastering request from devices (D 1 -D 8 ). The device controller causes the bus arbiter circuit ( 17 ) and a target detect circuit ( 16 ) to detect an initiator and a target, and a bus sequencer ( 2 ) to control signal issuing operation in a bus mastering cycle, for example, by an appropriate procedure based on the result of the detecting operation. An add-in board ( 30 ) is recognized as a single multifunction device.

Description

technical field [0001] The present invention relates to a device controller for controlling PCI devices and card devices on add-in boards. Background technique [0002] When performing function expansion of the PCI bus and the card bus, a method of adding additional boards and the like for installing devices having necessary functions to the slots is generally adopted. However, this method creates an unsuitable problem of limiting additional boards that may increase the setup due to the number of slots available on the host device side. In particular, since the number of PCI slots and card bus slots installed in host devices such as computers tends to decrease recently, in order to expand the above-mentioned functions, there are methods of installing PCI-PCI bridges (bridge) etc. in additional boards. In the case of a method in which a bridge is used to classify the bus, and a plurality of PCI devices are connected to the bus on the secondary side. [0003] However, when a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F13/40
CPCG06F13/4081
Inventor 牛上伸治
Owner WORKBIT CORP