A port management and control circuit of a secure computer

Abstract

The invention discloses a port management and control circuit of a secure computer, which comprises an I / O (Input / Output) expansion device, a programmable logic device, a network interface control circuit, a USB (Universal Serial Bus) interface control circuit and an SATA (Serial Advanced Technology Attachment) interface control circuit, The main control end controls the I / O expansion device through a signal path constructed by the programmable logic device and an I2C bus; The network interface control circuit detects a control signal expanded by the I / O expansion device and controls the network signal of the mainboard network controller to be connected with the network interface by judging the high level and the low level of the control signal; The USB interface control circuit provides aport management and control function for a plurality of USB interfaces; The SATA interface control circuit detects a control / system signal expanded by the I / O expansion device and controls the switchto be turned on and off by judging the high level and the low level of the control signal, so that the SATA data signal of the mainboard SATA controller is controlled to be connected with the SATA interface.

Description

technical field [0001] The invention relates to a port management and control circuit, in particular to a complete set of port management and control circuits of a dual-way master-controlled safety computer. Background technique [0002] With the continuous development of information technology and the continuous improvement of information security requirements, the demand for the use of computers is getting higher and higher, and the use of computers and human-computer interaction are inseparable from various peripheral interfaces. The port control circuit is mainly used for the management and control of the peripheral interfaces in the computer system. Under the requirements of different security environments, it can realize the access control and access restrictions of different interfaces to ensure the safety of the signal interface and the operation of the whole machine. [0003] In the past, the port management and control system was mainly implemented by software. By ...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a port management and control circuit of a security computer, which solves the problem that the traditional security computer port management and control system is not flexible enough to use and not widely applicable

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