Serial peripheral slave device interface structure in integrated circuit chip and data reading and writing method

Abstract

The invention relates to a serial peripheral slave device interface structure in an integrated circuit chip. The serial peripheral slave device interface structure comprises a register module, a storage module and a state machine logic control module. The serial peripheral slave device interface structure is connected with a central processor of the chip through an internal bus of the chip and is also connected with an external serial peripheral master device through a data transmission wire. The invention also relates to a method for rapidly reading and writing serial peripheral interface data in the integrated circuit chip through the interface structure. The method comprises steps of reading the data through the serial peripheral master device and writing the data through the serial peripheral master device. Through the serial peripheral slave device interface structure in the integrated circuit chip and the data reading and writing method, the data transmission rate is ensured to be much higher than that of an ordinary serial peripheral interface (SPI); the structure is simple; the operation mode is convenient and quick; the development cost is low; the working performance is stable and reliable; the application range is relatively wide; the high speed data transmission interface solution of an integrated circuit is widened; and the structure and the method have wide application prospect.

Description

technical field [0001] The invention relates to the field of integrated circuits, in particular to the technical field of serial data transmission in digital logic integrated circuit chips, and specifically refers to an interface structure of serial peripheral devices in integrated circuit chips and a method for reading and writing data. Background technique [0002] In the field of digital integrated circuits, serial data transmission is a widely used data transmission method. Its working principle is to transmit each bit of a piece of information in sequence. [0003] Commonly used serial data interfaces include UART, I2C, USB, SPI and so on. The following is a brief introduction to various serial ports: [0004] UART (Universal Asynchronous Receiver / Transmitter, Universal Asynchronous Receiver / Transmitter) is a mature asynchronous data transceiver interface, and its main signals include sending signal UART_TX and receiving signal UART_RX. The fastest transmission rate i...

AI Technical Summary

Problems solved by technology

The only shortcoming: the existing SPI interface in the industry, especially the SPI Slave, the actual fastest data transmission rate is about 10Mbps. Although it is much faster than serial ports such as UART and I2C, it still cannot meet some high-speed data transmission requirements. Demand (such as 3G wireless communication field)

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