Synchronous serial communication interface and communication method thereof

Abstract

The invention discloses a communication method of a synchronous serial communication interface. According to the communication method of the synchronous serial communication interface, data frames are adopted to perform communication, wherein each data frame includes a start bit, a command area, data areas and a checksum, wherein the command area is used for determining the effect of a current data frame, the data areas is data which are transmitted according to commands in the current data frame, and the checksum is check values for checking the start bit, the command area and the data in the data areas of the data frame; after the communication of each data frame terminates, both sides of communication clearly know whether faults occur in communication; and at the same time, read-write operation marks can be obtained through command field decoding. Read-write operation can be obtained through multi-bit decoding, such that the probability of misoperation caused by interferences can be reduced. Read-write mark bits and data fields in an existing communication method of a synchronous serial communication interface are vulnerable to electromagnetic interference, as a result, mutations will occur on the read-write mark bits and the data fields, and errors will be produced, while with the communication method of the invention adopted, the problem can be solved.

Description

【Technical field】 [0001] The invention belongs to the field of digital signal circuit design and communication technology, in particular to a communication method of a synchronous serial communication interface and the synchronous serial communication interface. 【Background technique】 [0002] In an integrated circuit, especially a non-on-chip system chip without a central processing unit, the serial communication interface is a very important circuit unit. The serial communication interface communicates using a serial data format, thus saving the input and output interfaces of the integrated circuit. The external circuit can communicate with the integrated circuit through the serial communication interface, configure the registers in the integrated circuit, and read the required data from the integrated circuit. [0003] There are currently two ways of serial communication, asynchronous serial communication and synchronous serial communication. Synchronous serial communic...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a communication method of a synchronous serial communication interface, which is used to solve the problem that the reading and writing flag bits and data fields in the existing communication method of the synchronous serial communication interface are easily subject to electromagnetic interference, resulting in sudden changes and errors.

Images