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Automatic direction detection circuit of bidirectional transmission interface

A technology of direction detection and two-way transmission, which is applied in the direction of logic circuit coupling/interface, logic circuit, logic circuit interface device and other directions of two-way operation, can solve the problem of large hardware loss, reduce hardware loss, improve flexibility, and highlight The effect of material characteristics

Active Publication Date: 2020-04-10
3PEAK INC
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  • Abstract
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Problems solved by technology

[0004] However, in the bidirectional transmission interface, the hardware loss of the existing automatic direction recognition is relatively large, and there is a delay problem in data transmission

Method used

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  • Automatic direction detection circuit of bidirectional transmission interface
  • Automatic direction detection circuit of bidirectional transmission interface

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Embodiment Construction

[0015] The specific implementation of the present invention will be described in further detail below in conjunction with the accompanying drawings of the embodiments, so as to make the technical solution of the present invention easier to understand and grasp, so as to define the protection scope of the present invention more clearly.

[0016] Aiming at the deficiencies in the prior art, the designer of the present invention conducted a comprehensive analysis of the circuit structure, combined with his own experience and creative work, devoted himself to seeking an optimization breakthrough in the automatic direction recognition of the bidirectional transmission interface, and innovatively proposed an automatic direction detection circuit, with Improve the flexibility and transmission efficiency of automatic identification of the interface direction.

[0017] Such as figure 1 The connection schematic diagram of the automatic direction detection circuit of the bidirectional tr...

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Abstract

The invention discloses an automatic direction detection circuit of a bidirectional transmission interface. The automatic direction detection circuit comprises a D trigger, a primary NAND gate and a final NAND gate which are configured corresponding to signal input and output on any side, a pre-driving signal is accessed to the D end of the D trigger; an input signal is accessed to a Clk end of the D trigger; the Q end of the D trigger outputs enable signals on the corresponding side sequentially through the primary NAND gate and the final NAND gate, the detection circuit is provided with periodic reset units connected to the Reset end of the D trigger based on input signals on the two sides, and the output ends of the primary NAND gates on the two sides are connected to one input end of the primary NAND gate on the other side in a jumper mode. By applying the detection circuit design, whether the output of the side is opened or not can be periodically detected through the rising edgeor the falling edge of the input side signal, and the enable signal can be reset; hardware loss of automatic direction recognition is greatly reduced, and flexibility of automatic direction recognition is improved.

Description

technical field [0001] The invention relates to a detection scheme of output enable in a data transmission interface, in particular to an automatic direction detection circuit of a bidirectional transmission interface. Background technique [0002] Half-duplex transmission refers to a transmission mode in which receiving and sending share a transmission channel, but only data can be sent or received at the same time. Full-duplex transmission, on the other hand, refers to a type of data transmission that occurs in both directions simultaneously. For example: a walkie-talkie is a half-duplex device that allows only one party to speak at the same time. A telephone, by contrast, is a full-duplex device in which both parties to the conversation can converse at the same time. [0003] In the chip design of such devices, bidirectional interface circuits are usually used for half-duplex data transmission, and time-division multiplexing is performed through input interfaces and out...

Claims

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Application Information

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IPC IPC(8): H03K19/0185
CPCH03K19/0013H03K19/017518H03K19/01759H03K19/018507Y02D10/00
Inventor 梁国辉
Owner 3PEAK INC
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