CPLD version display assembly, mainboard and server

Abstract

The invention relates to a CPLD version display assembly, a mainboard and a server, and the display assembly comprises a CPLD which is configured to enable a pin to reuse a JTAG pin based on a JTAG mode and output a version display signal through the JTAG pin; the JTAG connector is connected with the JTAG mode enabling pin and the JTAG pin; a first end of the power supply circuit is connected witha mainboard power supply, a second end of the power supply circuit is connected with the JTAG connector, and a third end of the power supply circuit is connected with a power input pin of the signalCPLD; and a pluggable display module, the display module comprising: a plurality of LEDs, the plurality of LEDs being connectable to a JTAG pin of the CPLD via a JTAG connector; and the super capacitor can be connected to the second end of the power supply circuit through a JTAG connector. By utilizing the display assembly, a tester or a producer can timely and quickly obtain the information of the CPLD version of the fan board, so that the additional time for connecting a mainboard and constructing a test environment is saved, and the CPLD version of the fan board can be efficiently and correctly controlled.

Description

Technical field [0001] The invention relates to the technical field of servers. The invention further relates to a CPLD version of the display assembly, motherboard and server. Background technique [0002] In the server, in order to control the temperature within a certain range, fans are usually used for cooling, and the fans are controlled in a targeted manner. Conventional fan board design often uses CPLD (Complex Programmable Logic Device) instead of fan signal control IC. The main reason is that in addition to the pins used for fan control and error signal LED lighting, CPLD has other pins that can be programmed to produce different functions, so it is more flexible and diverse in use. Because of this, the differences in CPLD versions need to be specially controlled to avoid mismatches with hardware design caused by applying different versions. [0003] The existing method generally uses a label to indicate the version, or the fan board is connected to the motherboard and ...

AI Technical Summary

Problems solved by technology

The former may cause an inconsistency between the actual version and the displayed version due to the secondary burning during the test process that changed the CPLD version; the latter requires a motherboard and an entire test environment, and the process of confirming the version is more complicated and costly

That is to say, neither of the above two methods in the prior art can confirm the CPLD version in time and quickly, and the correctness of the control of the fan board CPLD version and the efficiency of test production cannot be effectively improved.

[0004] Therefore, it is necessary to propose an optimized CPLD version display solution to solve the problems in the prior art that the display is not timely enough, accurate and the confirmation process is complicated

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