Control circuit for converting asynchronous interface into synchronous interface

An asynchronous interface and control circuit technology, applied in the direction of electrical digital data processing, instruments, etc., can solve the problems that asynchronous signals cannot be sampled and used, conversion efficiency is low, and clock signals cannot be used synchronously.

Active Publication Date: 2018-07-10
SHENZHEN STATE MICROELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, in order to avoid the metastable state of the system, it is generally necessary to provide a clock signal for two cycles of synchronous sampling when converting an asynchronous interface to a synchronous interface, resulting in the asynchronous signal not being able to complete...

Method used

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  • Control circuit for converting asynchronous interface into synchronous interface
  • Control circuit for converting asynchronous interface into synchronous interface
  • Control circuit for converting asynchronous interface into synchronous interface

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Embodiment Construction

[0021] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

[0022] An asynchronous interface-to-synchronous interface control circuit, the asynchronous interface includes an asynchronous read control terminal, an asynchronous write control terminal, an asynchronous control terminal, an asynchronous address terminal and an asynchronous data terminal, figure 1 It is a block diagram of an asynchronous interface to synchronous interface control circuit module of the present invention, refer to figure 1 , the input end of the control circuit is connected with the output end of the asynchronous interface, and the output end of the control circuit is connected with the input end of the synchronous circuit.

[0023] Specifically, the control circuit includes a read clock detection unit, a write clock detection unit, a first monostable unit, a second monostable unit and a d...

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PUM

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Abstract

The invention discloses a control circuit for converting an asynchronous interface into a synchronous interface and relates to the technical field of integrated circuits. According to the control circuit, through combination of a reading clock detection unit, a writing clock detection unit, a first monostable unit, a second monostable unit and a delay control unit, conversion from the asynchronousinterface into the synchronous interface is realized, synchronous transmission of data is completed, communication between the external asynchronous interface and a local synchronous circuit is realized, conversion is completed in one cycle, signal conversion efficiency is improved, and a metastable state is avoided.

Description

technical field [0001] The invention relates to the technical field of integrated circuits, in particular to an asynchronous interface-to-synchronous interface control circuit. Background technique [0002] An asynchronous interface is an interface that does not require a clock signal for data transmission. Taking the asynchronous random access memory interface as an example, it includes a chip select control terminal, a write control terminal, a read control terminal, an address terminal, and a data terminal. [0003] The synchronous interface is an interface for data transmission through the clock signal. All operations sample the interface signal at the edge of the clock. Taking the synchronous random access memory interface as an example, it includes the clock terminal, the chip selection control terminal, the write control terminal, the output control terminal, and the address terminal. and data terminal. [0004] At present, in order to avoid the metastable state of t...

Claims

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Application Information

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IPC IPC(8): G06F13/42G06F13/38
CPCG06F13/382G06F13/4221
Inventor 张家训谢文刚孙长江何凯
Owner SHENZHEN STATE MICROELECTRONICS CO LTD
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