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Device and method for operating multiple I2C sub device in communication equipment

A technology of communication equipment and devices, which is applied in the field of operating multiple I2C slave devices, which can solve the problems of unable to realize I2C slave device operation and many hardware devices, and achieve the effect of fast speed and low hardware cost

Inactive Publication Date: 2005-02-16
GLOBAL INNOVATION AGGREGATORS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that there are many hardware devices added. If the CPU has no I2C bus interface, the operation of the I2C slave device cannot be realized.

Method used

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  • Device and method for operating multiple I2C sub device in communication equipment
  • Device and method for operating multiple I2C sub device in communication equipment
  • Device and method for operating multiple I2C sub device in communication equipment

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Embodiment Construction

[0045] The hardware connection mode of the present invention sees figure 1 , including a CPU10, a logic device 20, a plurality of I2C slave devices 30, wherein the plurality of I2C slave devices have an I2C interface, and each I2C interface includes a serial clock line 321 and a serial data line 323 for Connect with the logic device 20 . The serial data lines 323 of each I2C slave device 30 are respectively connected to different IO pins (hereinafter referred to as data line pins) of the logic device 20 , which are designated as SDA1 , SDA2 , . . . , SDAn. Among them, SDA1, SDA2, ..., SDAn are respectively pulled to the power supply VDD of the interface signal by a pull-up resistor R; if it is connected to an interface with an internal pull-up resistor on the interface line, no additional pull-up resistor is required. The serial clock line 321 of each I2C slave device 30 is all connected with the same IO pin (hereinafter referred to as the clock line pin) of the logic device,...

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Abstract

The present invention relates to a device capable of operating several 12C slave devices in the communication equipment and its method. Said device includes CPU and logical device connected with CPU bus, and the serial clock lines of 12C interface of every slave device are connected with same clock line pin of the logical device, and the serial data lines of 12C interface of every slave device are respectively connected with different data line pins correspondent to the logical device. Said logical device interior includes a clock register whose output end is connected to the clock line pin of described logical device and several data registers, and between the output end of every data register and data line pin an electronic switch is set. Said invention also provides its operation method and its concrete steps.

Description

technical field [0001] The invention relates to the field of computer network communication, in particular to a method for operating multiple I2C slave devices in computer network communication equipment. Background technique [0002] In computer network communication equipment, more and more devices with I2C bus (INTER-IC BUS or IC TO BUS) interface are used. The I2C bus interface has the advantages of less signal lines and convenient operation. The general method of operating I2C relies on different device addresses to distinguish devices, and each device on the I2C bus has a unique device address. Some device addresses are configured by their own external hardware, while some device addresses are solidified inside the chip by the manufacturer and cannot be configured. In practical applications, multiple non-configurable I2C slave devices with the same device address will be used. For example, the I2C slave device address of the Small Form-Factor Pluggable (SFP, SmallFor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/00
Inventor 赵伟邵国
Owner GLOBAL INNOVATION AGGREGATORS LLC
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