Two-way transmission interface conversion circuit

Abstract

The embodiment of the invention provides a two-way transmission interface conversion circuit comprising a first conversion module which comprises a first current-to-voltage conversion circuit, a first voltage-to-current conversion circuit and a first detection circuit. The first current-to-voltage conversion circuit comprises at least one diode. The first voltage-to-current conversion circuit comprises a first switch, a second switch and a first current source. When the first switch is conducted, the second switch is cut off; and when the second switch is conducted, the first switch is cut off. The first detection circuit comprises a first comparator. One input end of the first comparator is connected with a high voltage source of a first voltage domain, and the other input end of the first comparator is connected with a transmission line. With application of the two-way transmission interface conversion circuit provided by the embodiment of the invention, signal transmission between the two voltage domains via the same signal line can be realized by arranging the conversion circuit between current and voltage and the comparator acting as the voltage detection circuit.

Description

technical field [0001] The invention relates to the field of electronics, in particular to a bidirectional transmission interface conversion circuit. Background technique [0002] Different chips of an integrated circuit need to communicate with each other. For the communication requirements between chips, the prior art usually adopts I 2 The standard formulated by the C bus transmission protocol has strong versatility, large data transmission volume, and fast transmission speed, but for scenarios with low data transmission volume and transmission rate, the cost is relatively high. In addition, there is also a single-wire and one-way communication implementation method in the prior art, but the disadvantage is that only one-way signal transmission can be realized. Contents of the invention [0003] The purpose of the present invention is to provide a bidirectional transmission interface conversion circuit to realize low-cost single-wire bidirectional communication under t...

AI Technical Summary

Problems solved by technology

[0002] Different chips of an integrated circuit need to communicate with each other. For the communication requirements between chips, the prior art usually adopts I 2 The standard formulated by the C bus transmission protocol has strong versatility, large data transmission volume, and fast transmission speed, but for scenarios with low data transmission volume and transmission rate, the cost is relatively high

In addition, there is also a single-line and one-way communication implementation method in the prior art, but the disadvantage is that only one-way signal transmission can be realized

Images