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Serial communication device, method thereof and communication system using the same

A technology of serial communication and equipment, which is applied in the field of communication systems and can solve the problems of increased circuit space and cost, large circuit scale, etc.

Inactive Publication Date: 2006-08-16
RICOH KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the scale of the circuit is large, and the space and cost of the circuit increase

Method used

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  • Serial communication device, method thereof and communication system using the same
  • Serial communication device, method thereof and communication system using the same
  • Serial communication device, method thereof and communication system using the same

Examples

Experimental program
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Embodiment Construction

[0065] Hereinafter, preferred embodiments of the present invention are explained with reference to the drawings.

[0066] figure 1 is a block diagram schematically illustrating a serial communication device according to an embodiment of the present invention.

[0067] exist figure 1 Among them, the serial communication device 1 performs serial communication between the host device HC and the slave devices SC1˜SCn (where n is an integer greater than 0) through half-duplex operation. The serial communication device 1 includes a main transmission / reception circuit 2 and secondary transmission / reception circuits SL1˜SLn.

[0068] Here, the main transmission / reception circuit 2 corresponds to a first transmission / reception circuit in the claims, and the sub transmission / reception circuits SL1˜SLn correspond to a second transmission / reception circuit in the claims.

[0069] The main transmission / reception circuit 2 is connected to the host device HC, and the sub transmission / re...

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PUM

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Abstract

A compact serial communication device is disclosed that is formed from simplified circuits on a master side and a slave side and does not need a synchronous signal and a switching unit for switching transmission and reception operations, and is able to reduce load of the slave side. The master transmission / reception circuit outputs a serial data signal DATA to a transmission path with the serial data signal DATA being generated by superposing a low level superposition pulse on a clock signal, when the clock signal is at the high level, according to an output data signal to be output to the slave transmission / reception circuits; the slave transmission / reception circuits superposes a high level superposition pulse on the serial data signal DATA input from the transmission path according to an output data signal to be output to the master transmission / reception circuit when the clock signal is at the low level.

Description

technical field [0001] The present invention relates to a serial communication device, a communication method of the device, and a communication system using the communication device, and more specifically, the present invention relates to a serial communication device that performs serial communication through half-duplex communication, A communication method of the serial communication device, and a communication system using the serial communication device. Background technique [0002] As we all know, in serial communication, there are various methods of transmitting serial signals. Figure 17 ~ Figure 20 Some examples of such methods are illustrated. [0003] Figure 17 A prior art method for transmitting serial signals in serial communication is exemplarily described. [0004] exist Figure 17 Among them, the data signal SdA is a common data signal, wherein the data value is directly represented by the signal level, and the data value is extracted from the data sign...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L5/16H04L7/04H04L29/08
CPCH04L5/16H04L7/0008H04L12/02
Inventor 门胁幸男
Owner RICOH KK
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