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Information processing apparatus, serial communication system, method of initialization of communication therefor, and serial communication apparatus

一种信息处理装置、串行通信的技术，应用在信道分配装置、同步信息通道、传输系统等方向，能够解决不能辨别未连接状态与相位偏移状态、不能决定通信等问题

Inactive Publication Date: 2013-09-18
CANON KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, it may not be possible to distinguish the unconnected state from the phase shifted state, thereby making it impossible to determine whether communication is possible

Method used

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  • Information processing apparatus, serial communication system, method of initialization of communication therefor, and serial communication apparatus
  • Information processing apparatus, serial communication system, method of initialization of communication therefor, and serial communication apparatus
  • Information processing apparatus, serial communication system, method of initialization of communication therefor, and serial communication apparatus

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Embodiment Construction

[0029] Hereinafter, preferred embodiments of the present embodiment will be described in detail with reference to the accompanying drawings. Note that the following embodiments are only examples, and do not limit the scope of the present invention.

[0030] As the serial communication system according to the embodiment, an information processing device including two integrated circuits for performing bidirectional serial communication will be exemplified.

[0031]

[0032] figure 1 is a block diagram showing an example of the arrangement of an information processing device including a serial communication system. In the information processing device, CPU 10 , ROM 11 and RAM 12 are connected to first bus 13 , and PCI 20 , USB 21 and IDE 22 are connected to second bus 23 . The first bus 13 is connected to the second bus 23 through the serial communication master device 100 and the serial communication slave device 200 . This arrangement includes a two-chip set as a represen...

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Abstract

The invention provides a technique of enabling to confirm the state of a partner apparatus in high-speed serial communication. An information processing apparatus including a master and a slave which is connected with the master by a plurality of signal lines to be able to make serial communication therewith, the master comprises: a decision unit configured to decide a change in signal level of a data signal line, and a switching unit arranged between the data signal line and the decision unit, and configured to switch whether to invert a logical value based on the fact that the decision unit has decided a change in signal level of the data signal line.

Description

Background technique [0001] Accompanying the increase in the degree of integration and processing capability of integrated circuits, the amount of data exchanged between a plurality of integrated circuits has increased, and thus the data rate has been expected to increase. The data rate can be increased by transferring data in parallel, but in this parallel transfer, since the number of terminals of the integrated circuit increases, the cost increases, and skew adjustment between data becomes difficult. Therefore, in recent years, a high-speed serial transfer method is often used. [0002] The serial transfer method is roughly divided into an embedded clock method and a source synchronous method. In the embedded clock method, a clock component is embedded in a data signal, and the receiving side extracts the clock and data from the data sequence, thereby performing communication. Therefore, the receiving side requires a mechanism for extracting clock information embedded in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L25/02H04L7/033
CPCH04L7/0008G06F13/4286H03M9/00H04L7/0037H04L7/0091H04L7/10H04L25/14
Inventor 平冈豪浅井弘树
Owner CANON KK