Communication module outputting a copy of a register of a retimer to a host device

A communication module and register technology, applied in instruments, transmission systems, digital transmission systems, etc., can solve problems such as higher cost and larger installation area

Inactive Publication Date: 2007-03-21
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Yet, the problem of above-mentioned retimer chip is, because do not have the practical bus that 10Gb Ethernet (R) communication module needs, i.e. MDIO (Medium DependentInput / Output) interface, so must set up the peripheral IC (Integrated Integrated Circuit) that MDIO interface is useful in addition. Circuit), the IC mounting area becomes larger and the cost becomes higher

Method used

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  • Communication module outputting a copy of a register of a retimer to a host device
  • Communication module outputting a copy of a register of a retimer to a host device
  • Communication module outputting a copy of a register of a retimer to a host device

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Embodiment 1

[0017] 1 is a block diagram showing a schematic configuration of a communication system including a 10Gb Ethernet (R) communication module (hereinafter referred to as a communication module) according to Embodiment 1 of the present invention. This communication system includes a communication module 12 and a MAC layer 1 that collectively manages the communication module 12 . Although only one communication module is described in FIG. 1 , a communication system includes a plurality of communication modules having the same configuration, and the MAC layer 1 collectively manages these communication modules.

[0018] The MAC layer 1 includes an MDIO host 2 that controls a communication module via a serial bus (MDIO bus) 8 .

[0019] The communication module 12 includes a microcomputer 3 for overall control of the communication module 12 connected to the MAC layer 1; the XAUI retimer 9 for controlling the communication physical layer in the communication module 12. Microcomputer 3...

Embodiment 2

[0035] Fig. 3 is a block diagram showing a schematic configuration of a communication system including a communication module according to Embodiment 2 of the present invention. Compared with the communication module of the first embodiment shown in FIG. 1 , the difference is that two microcomputers 3 are provided. The reference numerals of the two microcomputers of this embodiment will be described as 3A and 3B.

[0036] Microcomputer 3A includes MDIO interface 4A connected to MDIO host 2 in MAC layer 1, SRAM 5A, and flash ROM 7A. The SRAM 5A includes an IEEE dummy register 6A holding the contents of the IEEE register 10 . The flash ROM 7A stores programs executed by the microcomputer 3A, initial values ​​of IEEE registers, and the like. In addition, the SRAM 5A may be another random-access high-speed storage medium, and the flash ROM 7A may be another nonvolatile memory capable of retaining data even when the communication module 12 is powered off.

[0037] Microcomputer ...

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Abstract

A microcomputer (3) stores a copy of an IEEE register (10) having a value updated by an XAUI retimer (9) in an IEEE / XENPAK virtual register (6) in accordance with predetermined timing. In response to a request by a MAC layer (1), the microcomputer (3) outputs the copy of the IEEE register stored in the IEEE / XENPAK virtual register (6) to the MAC layer (1) via a MDIO interface (4). Therefore, microcomputer (3) can centrally control the contents of the registers, and can rapidly send the value of the register in response to the request by the MAC layer (1).

Description

technical field [0001] The present invention relates to the 10Gb Ethernet (R) communication module of LX4 etc., particularly relate to unified management register defined by IEEE (the Institute of Electrical and Electronics Engineers, Inc.) 802.3ae and by XENPAK (10 (X) GEtherNet (R) transceiver 10Gb Ethernet (R) communication module MSA (Multi Source Agreement) defined communication module. Background technique [0002] In recent years, LAN (Local Area Network) such as Ethernet (R) has been widely used, but the development of 10Gb Ethernet (R), which further increases the transmission speed, has become more and more active. [0003] In the conventional LX4 10Gb Ethernet (R) communication module, the registers defined by IEEE802.3ae are supported by a retimer chip (XAUI (10(X)G AttachmentUnit Interface) retimer) that controls the physical layer. [0004] As a technical document related to this, there is the following document (Introductory Gigabit Ethernet (R) (Network Tech...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/28G06F13/10H04L12/02H04L12/413H04L29/10
CPCH04L12/403A01G13/0206A01G13/025
Inventor 森胁升平
Owner MITSUBISHI ELECTRIC CORP
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