PECI bus switching device, method and system

Abstract

The invention relates to the technical field of servers. The invention provides a PECI bus switching device, method and system. The PECI bus switching device comprises a first CPU, a second CPU, a BMCand a PCH. The BMC and the PCH are connected with each other; the first PCU and the second CPU are connected with each other. The PECI bus switching device comprises a complex programmable logic device used for receiving a customized selection instruction of a user, automatically performing CPU PECI signal switching between the BMC and the PCH according to the customized selection instruction, and the complex programmable logic device is provided with a first GPIO port, a second GPIO port and a third GPIO port; the first GPIO port is respectively connected with the first PCU and the second CPU through a PECI bus; the second GPIO port is connected with the BMC through the PECI _ BMC bus, and the third GPIO port is connected with the PCH through the PECI _ PCH bus, so that the customizationrequirements of different customers are met by one main board, and the cost is also reduced.

Description

Technical field [0001] The invention belongs to the technical field of servers, and in particular relates to a PECI bus switching device, method and system. Background technique [0002] The Platform Environment Control Interface (PECI) interface specification was proposed by Intel. As a new generation of digital interface, it is a dedicated single-wire bus (single bus) between the processor and other chips or system stability monitoring equipment. wire bus). PECI can transmit the processor core temperature read by the Digital Thermal Sensor (DTS) in the main processor of the system, which can be used to report the CPU temperature. It is a subset of the SST protocol, the transmission speed range is also between 2Kbps ~ 2Mbps, the current frequency of use is 1M, but the instructions are more simplified and easier to build than SST. [0003] In order to ensure the correctness of the data, PECI uses Cyclical Redundancy Check (CRC) bytes for error checking. This capability makes the ...

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Problems solved by technology

[0005] In view of the defects in the prior art, the present invention provides a PECI bus switching device, which aims to solve the problem that the connection mode of the CPU PECI bus in the current products in the prior art is not flexible enough, and after the line connection is solidified, it will be solidified with the PCB. There is no way to make changes according to customer needs or technical requirements in the future. If changes must be made to the board, this will bring about a lot of waste of cost and resources.

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