A hardware implementation method of an on-chip reconfigurable serial bus controller

Abstract

The invention provides a hardware implementation method of an on-chip reconfigurable serial bus controller, which includes such steps as defining a plurality of states, realizing corresponding logic function through control circuit, sequentially configuring state machine transition and jump corresponding to supported communication protocol to support different interface protocol through software configuration, and sequentially configuring software to support different interface protocol. The present invention implements maximum multiplexing control logic to support applications such as I2C, SPI, SSP, Microwire, Enhanced SPI, IrDA 1.0 SIR, RS485, UART, ISO 7816-3 and other standard communication protocols, as well as the hardware implementation method of supporting some non-standard protocols easily through the flexible configuration, not only saves the area, but also saves the development time of a large number of non-standard protocol circuits.

Description

technical field [0001] The invention relates to the field of chips, in particular to a hardware implementation method of a reconfigurable serial bus controller in an SoC chip. Background technique [0002] The serial bus is a device used to realize the connection and data exchange between the chip and external devices. The function of the serial bus controller (interface) is to realize that the CPU connects the peripheral devices together through the serial bus. There are many types of serial bus controllers, and their corresponding interface circuits are different. Usually the chip may be connected with different peripheral devices, and the types of serial bus interfaces that different peripheral devices can provide are also different. [0003] To deal with this demand, the usual practice is that the chip will integrate different interface IPs to support the required serial bus protocol as comprehensively as possible, because these IPs are independent and do not multiplex...

AI Technical Summary

Problems solved by technology

[0003] To deal with this demand, the usual practice is that the chip will integrate different interface IPs to support the required serial bus protocol as comprehensively as possible, because these IPs are independent and do not multiplex control logic circuits, and are usually not used at the same time All serial bus controllers waste a lot of area

Sometimes to deal with peripheral devices with special needs, the chip may also need to provide a serial bus protocol that supports non-standard protocols. The reusability of serial bus controllers with standard protocols is not high

Images