A method of isolation to avoid smbus interference

Abstract

The invention discloses an isolation method for avoiding SMBUS interference, which belongs to the field of server management; when the invention uses a group of SMBUS from a server BMC to mount non-SMBUS interface equipment, an isolation chip is added to the non-SMBUS interface equipment to isolate the non-SMBUS interface equipment. The GPIO of the interface device is output to the enable pin of the isolation chip. After the initialization of the non-SMBUS interface device is completed, according to the program setting, different GPIOs output different levels, and output a high level after passing through the XOR gate to turn on the isolation chip. , the mounted SMBUS will be normally managed and monitored by the BMC to solve the problem of devices without SMBUS interfaces. During the power-on phase, due to the long program initialization time, the level status of the SMBUS interface will be very unstable, which may cause BUS BUSY Thus affecting the normal operation of the BMC and avoiding the impact of the SMBUS in the above cases.

Description

technical field [0001] The invention discloses an isolation method for preventing SMBUS from being interfered, and belongs to the field of server management. Background technique [0002] In the server field, BMC is used to monitor and manage the entire system. However, in high-end servers, the number of devices that need to be managed is often relatively large. Due to the limitation of the number of SMBUS of the BMC module, it is often necessary to connect multiple devices in parallel on a set of SMBUS to achieve full utilization. Some devices, such as PSoC, FPGA do not have a dedicated SMBUS interface, and usually use GPIO to define the SMBUS interface in software. During the power-up phase, these devices, such as PSoC, FPGA usually last a long time for program initialization. At this stage, the level status of the SMBUS interface is very unstable. If the BMC is managing other devices at this time, it will cause BUS BUSY and affect the normal operation of the BMC. The ...

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the equipment without SMBUS interface in the prior art. In the power-on stage, due to the long program initialization time, the level state of the SMBUS interface will be very unstable, which may cause BUS BUSY and thus affect the normal operation of the BMC. It provides An isolation method for avoiding SMBUS interference, avoiding SMBUS being affected in the above-mentioned cases

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