Automatic relieving method and device for data caching flux

Abstract

The invention discloses an automatic relieving method for data buffer overflow. When the overflow of an FIFO storage which is taken as a data memorizer is detected by the method, the frequency of executing the reading operation of FIFO is increased through adjusting FIFO parameters; wherein, as for synchronous FIFO, the FIFO parameters are adjusted by reducing FIFO read width; as for nonsynchronous FIFO, the FIFO parameters are adjusted by reducing one of the FIFO read width, increasing FIFO read clock and decreasing FIFO write clock or the random combination of the three. The method also discloses a data buffer overflow automatic relieving device. The method with flexible means can automatically relieve FIFO overflow.

Description

technical field [0001] The invention relates to buffer technology, in particular to an automatic release method and an automatic release device for data buffer overflow. Background technique [0002] The meaning of FIFO is first-in-first-out (First In First Out). In the technical field of buffers, a first-in first-out data buffer is usually called FIFO. [0003] The read and write data of FIFO is carried out at the same time, that is, the end of writing data is always written to FIFO, and the end of reading data is always reading data from FIFO. The read and write operations of FIFO are controlled by two clocks respectively: FIFO read clock and FIFO write clock. For the read operation, when the valid edge of the FIFO read clock arrives, judge whether the data bit in the FIFO is greater than or equal to the set FIFO read width, if yes, execute the read operation, otherwise wait for the next valid edge of the FIFO read clock The arrival of the above judgment operation is per...

AI Technical Summary

Problems solved by technology

However, when the chip is made into a product, its FIFO parameter value is solidified in the chip and cannot be adjusted.

The FIFO parameters determined during the development of the modulation cannot guarantee that the FIFO will not overflow under any circumstances, and once overflowed, it will not be automatically released

[0005] It can be seen that there is currently no automatic solution to FIFO overflow that can be applied to chips using FIFO

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