Pin configuration method of MCU chip and MCU chip

Abstract

The invention relates to the technical field of chip design, and discloses a pin configuration method of an MCU chip and the MCU chip. In the method, a power supply pin, a grounding pin and a clock pin of the MCU chip are directly and electrically connected with a power supply end, a grounding end and a clock end of a CPU of the MCU chip, and an IO pin of the MCU chip is electrically connected with the CPU through an IO control module. In actual use, the working mode of the IO pin is configured through the IO control module, so that more wiring on the PCB due to limitation of the spatial position of the IO pin is not needed, and board rearrangement due to change of use requirements or wrong connection between a peripheral circuit on the PCB and the IO pin of the MCU chip is not needed; the PCB does not need to be re-typeset when the MCU chip is upgraded and replaced, and only the working mode of the I-O pin of the MCU chip needs to be set to be the same as the working mode of the I-O pin of the original MCU chip on the PCB, so that the method is simple and convenient, and a customer can flexibly apply the method according to own requirements.

Description

technical field [0001] The invention relates to the technical field of chip design, in particular to a pin configuration method of an MCU chip and the MCU chip. Background technique [0002] MCU, also known as single-chip microcomputer, is to appropriately reduce the frequency and specifications of the central processing unit, and integrate functional modules such as memory, counter, USB, A / D conversion, UART, PLC, DMA, PWM, middle segment, and even LCD drive circuits. On a single chip, a chip-level computer is formed to control different combinations for different applications. At present, after the design of the MCU chip is completed, the function of each pin of the chip is basically determined. However, in actual use, the following conditions will affect the layout position of the functional pins of the MCU chip: [0003] First of all, if it is not easy to connect during board-level wiring, for example, an analog signal pin is above the chip, but the board-level analog s...

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Problems solved by technology

[0003] First of all, if it is not easy to connect during board-level wiring, for example, an analog signal pin is above the chip, but the board-level analog signal pin can only be placed below the chip due to space constraints, then the wiring will be relatively convoluted. , resulting in too long traces, which increases noise;

[0004] Secondly, after the wiring is determined at the board level, if the usage requirements change, the wiring of the corresponding pin pins will change, and at this time, the board can only be re-arranged;

[0005] In addition, it is necessary to re-layout the board when there is a mistake in the board-level wiring;

[0006] Finally, due to the update and upgrade of the MCU, when the MCU chip on the circuit board is replaced, the new MCU cannot be directly applied to the circuit board due to the different definitions of the function pins of different MCUs, and the circuit board needs to be redesigned, and the circuit board needs to be redesigned. Board re-layout results in longer design cycles and higher costs

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