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Bus system and bridge circuit connecting bus system and connection apparatus

A technology for connecting devices and bus systems, applied to instruments, electrical digital data processing, etc., can solve problems such as inability to complete transmission, inability to complete access, etc.

Inactive Publication Date: 2012-03-14
SONY CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Transfers between master M0 and slave S1 may also fail to complete when there is an ordering provision that data from slave S0 returns to master M0 earlier than data from slave S1
At this time, since the transfer may not be completed in the slave device S1 itself, when the master device M1 accesses the slave device S1, the access may also not be completed

Method used

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  • Bus system and bridge circuit connecting bus system and connection apparatus
  • Bus system and bridge circuit connecting bus system and connection apparatus
  • Bus system and bridge circuit connecting bus system and connection apparatus

Examples

Experimental program
Comparison scheme
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no. 1 example

[0040] 1. First embodiment (the case of signal clamping in the off phase is not assumed); and

[0041] 2. Second embodiment (assuming the case of signal clamping in the off phase).

[0042] 1. The first embodiment

[0043] [Overall configuration of the bus system]

[0044] figure 1is a block diagram showing the overall configuration of the bus system according to the first embodiment of the present disclosure. In a bus system, a plurality of connected devices are connected to an interconnection 300 serving as a bus. A plurality of connected devices are classified into M master devices 100 and S slave devices 200 . The master device 100 is a connection device that plays a leading role in data transmission. Furthermore, the slave device 200 is a passively operated device. It is to be noted that M and S are integers each of which is equal to or greater than 1.

[0045] In the first embodiment of the present disclosure, the master disconnect bridge 400 is connected between ...

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PUM

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Abstract

A bus system includes: a first connection apparatus and a second connection apparatus carrying-out an exchange in accordance with a predetermined protocol; a bus through which the first and second connection apparatuses are connected to each other; and a bridge inserted between the first connection apparatus and the bus, and carrying out an exchange with the second connection apparatus in accordance with the predetermined protocol instead of the first connection apparatus when receiving a disconnection instruction for the first connection apparatus.

Description

technical field [0001] The present disclosure relates to a bus system, and in particular to a bridge circuit by which a bus system and connecting devices are interconnected. Background technique [0002] In a bus system, a plurality of connected devices are connected to the bus (also called "interconnection"), and data transmission is performed among the plurality of connected devices. A connected device that plays a leading role in data transmission is called a master device, while a connected device that operates passively is called a slave device. For example, assume a processor as an attached device that becomes a master. For example, assume a memory as an attached device that becomes a slave. [0003] In such a bus system, for a series of operations (processing) for data transfer, a request for data transfer and actual data transfer are controlled independently of each other (separate processing), thereby making it possible to improve transfer efficiency. On the othe...

Claims

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Application Information

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IPC IPC(8): G06F13/42
CPCG06F13/4036
Inventor 三林秀树
Owner SONY CORP