Mainboard debugging circuit

Abstract

A debugging circuit comprises a debugging interface, a switch unit coupled to the debugging interface, a controller coupled to the switch unit, a platform controller hub (PCH), and a central processing unit (CPU). The PCH and the CPU are coupled to the switch unit. The debugging interface is coupled between the switch unit and a debugging device. The switch unit receives a control signal from the controller, and selectively outputs a first data signal from the PCH or a second data signal from the CPU to the debugging device through the debugging interface according to the control signal.

Description

technical field

[0001] The invention relates to a motherboard debugging circuit. Background technique

[0002] In the current server design, we need to use the Basic Input Output System (BIOS) to troubleshoot the motherboard's Platform Controller Hub (PCH) and microprocessor (Central Processing Unit, CPU). In debugging, usually an interface connector connected to the main board is configured for the PCH and CPU respectively. In this way, not only the space on the main board is occupied, but also the corresponding interface connector needs to be replaced when the debugging of the PCH and the CPU is switched, resulting in Debugging efficiency is reduced. Contents of the invention

[0003] The invention provides a main board debugging circuit which enables a platform control center and a microprocessor to share one debugging interface.

[0004] A motherboard debugging circuit, comprising:

[0005] A platform control center, including a first set of data pins and a second s...

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