Conversion and transmission circuit for non-shielding interrupt request

Abstract

A conversion transmission circuit of a non-maskable interrupt request is used to transmit the non-maskable interrupt request among a south bridge, a BMC, a first chip and an IOH of a central processor, which comprises a switch, an electrical level conversion module and a logic and electrical level conversion module, wherein the switch comprises a first end, a control end and a second end, the first end is grounded, the control end is coupled with the south bridge for receiving the control of the non-maskable interrupt request of the south bridge to conduct or cut off the first end and the second end. The electrical level conversion module comprises a first diode and a second diode, wherein the first diode is respectively coupled with the second end and a first power supply voltage through a first resistance after connecting with the positive electrode of the second diode, the negative electrode of the first diode is respectively coupled with the BMC and is coupled with the grounding voltage through a second resistance, and the negative electrode of the second diode is respectively coupled with the first chip and is coupled with the ground through a third resistance. The logic and electrical level conversion module is used to reversely transmit the signal of the input end to output, and makes the high electrical level to be in accordance with the electrical level of a second power supply voltage.

Description

technical field [0001] The invention relates to a logic transmission circuit of a non-shielding interrupt request, in particular to a switching transmission circuit of a non-shielding interrupt request of a server system. Background technique [0002] Interrupt mode is a way for the central processing unit (CPU) to passively accept device requests for service. When the device is ready to transmit data to the CPU or is ready to receive data from the CPU and other emergencies, the device will send an interrupt request to the CPU. When the CPU receives an interrupt request, under certain conditions (such as a very high level of interrupt request), the CPU will temporarily stop executing the current main program, switch to processing the interrupt request with a higher level of request, and return to and continue to execute the main program after processing. program. Interrupt requests can be divided into non-maskable interrupt requests (NMI, Non-Maskable Interrupt), maskable ...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a non-shielding interrupt request conversion transmission circuit to solve the problems of complex circuit, high material cost and inconvenient application in the prior art

Images