Chip and implementation method for multiplexing pins of chip

Abstract

The invention discloses a chip and an implementation method for multiplexing pins of the chip. The chip comprises an internal function module, an internal GPIO module and a pin multiplexing module, wherein the internal function module provides a function signal led out to a chip pin, the internal GPIO module provides a GPIO signal, and the pin multiplexing module leads out the GPIO signal to the chip pin and maps the function signal provided by the internal function module to any chip pin. According to the chip, the pin multiplexing module is additionally arranged, so that function signals inthe chip can be mapped to any pin, the function expansion of the chip is more flexible, the chip function can be conveniently changed or added or deleted according to the actual requirement in the later period, and the application range of a chip product is further expanded. The pin multiplexing table is simplified, the script file is operated according to the pin multiplexing table, the pin multiplexing code file is automatically generated, and when the design is changed, the pin multiplexing code file can be generated only by updating the pin multiplexing table and then operating the scripttool again, so that the method is safer and more reliable.

Description

technical field [0001] The invention relates to the technical field of computer chip design, and more specifically relates to a method for implementing multiplexing of a chip and its pins. Background technique [0002] At present, with the development of chip technology, the integration of chips is getting higher and higher, and the functions supported by the chip are becoming more and more complex. The functional modules inside the chip have more and more interface signals that need to be led out to the chip pins, but the chip The number of pins is limited. Today's chips usually multiplex a single chip pin as multiple interface signals of internal functional modules, generally three to four, that is, three to four internal functional signals share the same chip pin. For each internal function signal, generally only lead to a single chip pin. [0003] On the one hand, the multiplexing relationship of chip pins is generally determined according to typical application scenar...

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Problems solved by technology

Moreover, the implementation method of the pin multiplexing is to simplify the pin multiplexing table, and run the script file according to the pin multiplexing table to automatically generate the pin multiplexing code file, so that when the design is changed, only the pin multiplexing needs to be updated. Table, and then re-run the script tool to generate the pin reuse code file, without manually modifying the code file, which solves the problem of high error rate caused by artificially modifying the signal

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