Implementing method for improving property of embedded MCU (microprogrammed control unit)

Abstract

The invention discloses an implementing method for improving property of an embedded MCU (microprogrammed control unit). The method is characterized in that a processor, a processor interface, a data cache, an on-chip nonvolatile memory, a memory interface and a prefetching controller are arranged; the ratio relationship between the data widths of the on-chip nonvolatile memory and the processor is utilized, the data cache is used, and the reading of the on-chip nonvolatile memory is accelerated by a particular prefetching control method. Because of the technical and cost limitations, the reading rate of the on-chip nonvolatile memory is generally slower, and therefore the processing rate of the MCU is limited; to solve the problem, the special data cache and the prefetching controller are utilized in the MCU, the data throughput of the on-chip nonvolatile memory is greatly improved, namely the property of the MCU is improved; the digital logic design type ping-pong structure and flow process technique are adopted. The method has the advantages that the area is small, the cost is low, the rate is high, the implementing is easy, and the like.

Description

technical field [0001] The invention discloses a method for improving the performance of an embedded MCU, which belongs to the field of integrated circuit design, and in particular relates to the design of an MCU for accelerating instruction reading in an on-chip non-volatile memory. Background technique [0002] In the field of integrated circuits, as the scale and complexity of chips become higher and higher, the requirements for memory capacity and access speed are also higher and higher. As the most commonly used non-volatile memories of chips, Flash, OTP and MTP, etc., are playing an increasingly important role. At the same time, the access rate of these non-volatile memories is relatively low, which is the bottleneck of increasing the overall operating frequency of the chip. [0003] In order to improve the access rate of on-chip non-volatile memory, it is an effective method to use a prefetch controller. One of the existing methods is to use cache memory (Cache), whi...

AI Technical Summary

Problems solved by technology

[0003] In order to improve the access rate of on-chip non-volatile memory, it is an effective method to use a prefetch controller. One of the existing methods is to use cache memory (Cache), which is the CPU and on-chip non-volatile memory. Although the first-level buffer memory between the memories greatly improves the reading rate of the on-chip non-volatile memory, the memory capacity it uses is relatively large, which greatly increases the cost of the chip.

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