Communication method of IP module of SOC (System-On-Chip) and OCB (On-Chip Bus)

Abstract

The invention relates to a communication method of an IP module of SOC (System-On-Chip) and OCB (On-Chip Bus). In the method, two groups of registers are arranged between the IP module and the OCB; the two groups of registers are respectively a control register and a data register; a control signal emitted by a CPU of SOC is loaded to the control register through OCB; the control register controls the work of the IP module; after the work is finished, the IP module requests interruption to the CPU through the control register and writes generated data into the data register; the CPU responses to the interruption in suitable time; and the data in the data register are read into the CPU or put into a on-chip-memory of SOC. According to the communication method of the invention, the working speed of the IP module is irrelevant to a clock of the CPU and has independence; the CPU automatically finishes reading and writing in the suitable time according to a real condition; in this way, the CPU can be released for processing other affairs; the communication is quicker and more efficient; and the communication method is suitable for various IP modules.

Description

technical field [0001] The invention relates to a semiconductor communication method, in particular to a communication method between an IP module of an on-chip system and an on-chip bus. Background technique [0002] SoC (system on chip) system integrates the functions originally completed by many chips into one chip, but it is not a simple superposition of the functions of each chip, but a combination of software and hardware based on the functions and performance of the entire system. The method uses IP multiplexing technology to implement complex functions on one chip with one or more CPUs as the core. The key to IP multiplexing technology is to establish a complete on-chip bus (OCB, on-chip bus) communication system. On-chip bus is the key in SoC design, and the communication between each IP and CPU is realized by on-chip bus. This is particularly prominent in applications with a long time or a large amount of data, which puts high demands on the communication betwee...

AI Technical Summary

Problems solved by technology

Use I 2 The data transmission method of the C bus has high requirements on timing, and the speed is slow, which takes a long time for the processor.

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