A method and system for re-powering on a chip after a momentary power failure

Abstract

The invention discloses a method and system for re-powering on a chip after a power supply is cut off instantaneously, and relates to the technical field of optical transmission equipment. The invention monitors whether the voltage of a bus power supply exceeds a preset threshold range or exceeds a preset threshold after a power supply is cut off momentarily. When it is within the range, turn off the output of all chip power supplies; monitor the bus power supply voltage and all chip power supply voltages, and when it is detected that all chip power supplies are completely powered off and the bus power supply voltage is within the preset threshold range, follow the set sequence Turn on the output of all chip power supplies, which solves the problem of re-powering the chips after the power supply is cut off. Regardless of whether it is normal power on or off, or under abnormal conditions such as power failure, after power failure and restart, each chip will resume normal operation and business can be restored. The invention improves the maintainability of the telecommunication equipment, and especially solves the problem that the remote computer room and the unattended computer room need to manually restore the equipment due to the abnormal operation of the board card in the case of lightning strikes, battery and mains switching, etc.

Description

technical field [0001] The invention relates to the technical field of optical transmission equipment, in particular to a method and system for re-powering on a chip after a power supply is momentarily cut off. Background technique [0002] Existing optical transmission equipment generally consists of a power supply unit, a fan unit, and a service unit. The power supply unit inputs 48V DC or 220V AC power supply, and provides -48V DC power supply to the entire device; the business unit is generally composed of different types of circuit, control, switching and other boards, providing business transmission, management and other functions. [0003] The business unit board is in the power supply field, input -48V DC power supply, and convert it to 12V / 5V through the isolated DC-DC power module, and then convert it to 1.0V, 1.5V, 3.3V, etc., to supply each chip on the board card; In addition, the business unit board needs to design the power-on sequence of different voltage pow...

AI Technical Summary

Problems solved by technology

When the instantaneous interruption time t meets certain conditions, one or several power supplies such as 1.0V, 1.5V, 3.3V, etc. have power-off incompletely, and then power on again, which does not satisfy the power-on of the chip to its power supply. Sequence, slope and other requirements, resulting in chip abnormalities. The phenomenon is that the board is powered off and restarted abnormally, and the business cannot be restored, which seriously affects the stability and maintainability of carrier-grade equipment.

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