Low-power UART serial port system

Abstract

The invention provides a low power consumption UART serial port system, which comprises a data transceiver module, a baud rate detection module, a memory module, an interrupt logic control module and a peripheral bus module, and is characterized in that the data transceiver module comprises a receiving end and a transmitting end, an input interface of the receiving end receives external data, and an output interface of the transmitting end receives the external data; an output interface of the receiving end is connected with the Baud rate detection module, external data is subjected to Baud rate detection through the Baud rate detection module, an output end of the Baud rate detection module is respectively connected with the memory module and an input interface of the transmitting end, the memory module is connected with the peripheral bus module, and the transmitting end is connected with the peripheral bus module. The output end of the peripheral bus module is connected with external equipment, an interrupt logic control module is further connected between the storage module and the peripheral bus module to generate interrupt, data receiving and sending can be carried out on low-frequency clock signals, baud rate automatic detection can be carried out, and system power consumption is low.

Description

technical field [0001] The invention relates to the technical field of chip design, in particular to a low-power consumption UART serial port system. Background technique [0002] The Universal Asynchronous Receiver Transmitter is usually called UART, which converts the data to be transmitted between serial communication and parallel communication. As a chip that converts parallel input signals into serial output signals, UART is usually integrated in other communication interfaces. link up. [0003] The specific object is shown as an independent modular chip, or as a peripheral device integrated in the microprocessor, generally in the RS-232C specification, and matched with a standard signal amplitude conversion chip like Maxim's MAX232, as a connection to external devices Interface. [0004] A general UART includes the following structure: (1) output buffer register, used to receive the parallel data sent by the CPU from the data bus, and save it; (2) output shift regist...

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Problems solved by technology

[0005] In the process of using the UART serial port in the prior art, for some low-frequency clocks, it is difficult to realize the automatic detection of the baud rate

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