Processor hardware configuration word loading method and device

Abstract

The application discloses a processor hardware configuration word loading device. The processor hardware configuration word loading device comprises a second-category data bit output module and a third-category data bit output module. The second-category data bit output module comprises m branches, each branch comprises a resistor and a driver, an input end of each driver is pulled up to a power source through a corresponding resistor, and an output end of each driver outputs corresponding second-category data bits. The third-category data bit output module comprises at least one resistor, at least one NOT gate, at least one switch and n drivers respectively corresponding to n third-category data bits, an output end of each driver outputs corresponding third-category data bits, and an input end of each driver achieves connection through a corresponding resistor, a corresponding NOT gate and a corresponding switch; combination of high and low levels under corresponding operating modes is achieved through the resistors, the NOT gates and the switches, and combination switching of high and low levels under different operating modes is achieved through on and off of the switches; an enabling end of each driver is connected with a reset signal of a processor.

Description

technical field [0001] The present application relates to the technical field of digital circuits, in particular to a method and device for loading processor hardware configuration words. Background technique [0002] With the development of the electronics industry, the application scenarios of processors are becoming more and more extensive. General processors need to provide hardware configuration words at power-on reset, and the processor determines how to initialize the hardware resources of the processor according to the hardware configuration words obtained at reset, such as the processor working clock, data interface mode, and certain pins definition etc. [0003] The processor obtains the hardware configuration word when it is in the reset state, that is, the processor reads the data on the data bus when it is in the reset state, and determines its working mode according to the obtained data. If you want to change the operating mode of the processor, you must rese...

AI Technical Summary

Problems solved by technology

The process of changing the entire hardware configuration word is relatively complicated and takes a long time, and the power cannot be cut off during the modification process, so this method is not suitable for use during mass production and maintenance

At the same time, this method requires software participation, which will introduce uncertain factors and affect the stability of the system.

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