Ethernet Small Form Pluggable (SFP) electric module and method for realizing isochronous Ethernet

Abstract

The invention discloses an Ethernet Small Form Pluggable (SFP) electric module and a method for realizing isochronous Ethernet. The module comprises an Ethernet Media Independent Interface (MII) interface, a Physical (PHY) module and a micro-control unit (MCU), wherein a TxDisable signal in the interface and a local clock signal are connected with an RefCLK signal input pin on the PHY module through a first alternative selector; an RcvCLK signal outputted by the PHY module and a low level signal are connected to a Txfault signal pin in the interface through a second alternative selector; the MCU controls the first alternative selector through a reference clock control signal CLKSEL0 and selects an input signal of a TxDisable pin or the local clock signal as a reference clock input signal; and MCU controls the second alternative selector by a restoration clock control signal CLKSEL1 and restores a clock at an output line of the Txfault pin or outputs low level. According to the Ethernet SFP electric module and the method for realizing isochronous Ethernet, by utilizing the two pins which are only relevant with an optical module, the system clock is transferred to the module as a PHY reference clock, a line clock extracted by PHY is transferred to a system as a system phase-locked loop reference source, and thereby realizing the synchronizing processing of the Ethernet SFP electric module.

Description

technical field [0001] The invention relates to synchronous Ethernet, in particular to an Ethernet SFP electrical module and a method for realizing synchronous Ethernet. Background technique [0002] SFP (SMALLFORMPLUGGABLE) module is a hot-swappable small package module, its function is to realize the mutual conversion between optical signal and electrical signal, and it has been widely used in the field of telecommunications and data communication. [0003] The SFP module is regulated by a multilateral agreement (MSA) among competing manufacturers, which can only realize simple mutual conversion of optical signals and electrical signals, and does not involve code conversion. However, with the gradual popularization of the Ethernet standard in the telecommunications field, many module manufacturers have begun to launch a so-called "Ethernet SFP electrical module" on the basis of following the MSA standard, which is a chip that implements physical layer functions defined by ...

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is to solve the problem that the clock information contained in the cable signal of the Ethernet SFP electrical module cannot be uploaded to the system

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