Method for updating register

Abstract

The invention provides a method for updating a register. The method comprises the following steps: providing a bit mapping register; providing a target register; establishing mapping between each bitin the bit mapping register and a corresponding target content block in the target register; providing a register update instruction, wherein the register update instruction comprises: one or more flag bits at a specified location, each flag bit corresponds to a bit in the bit mapping register, and indicates whether the target content block corresponding to the bit needs to be updated, and for each to-be-updated target content block indicated by the bit, the register update instruction further comprises new content of the target content block or a source of the new content; writing one or moreflag bits in the register update instruction into the bit mapping register; and executing, by an update controller, the register update instruction according to the bit in the bit mapping register toupdate the target content block in the target register, wherein only each to-be-updated target content block indicated by the bit is updated.

Description

technical field [0001] The invention belongs to the field of SoC integrated circuit design, in particular to a method for updating registers. Background technique [0002] SPI (Serial Peripheral Interface, Serial Peripheral Interface) is a synchronous serial transmission interface proposed by Motorola, mainly used for communication between microcontrollers and peripherals, and between microcontrollers. It has the characteristics of simple circuit implementation, fewer bus pins, and faster transmission rate. [0003] The traditional SPI interface includes 4 signal lines: SS (Slave Select, slave selection line), SCK (SPI Clock, SPI clock line), MOSI (Master Output / Slave Input, master output slave input line) and MISO (MasterInput / Slave Output, master input slave output line). [0004] With the development of SPI interface technology, people put forward higher and higher requirements for the data reliability and throughput of SPI interface, and the transmission speed of main...

AI Technical Summary

Problems solved by technology

Updating or resetting the entire register set by the CPU further imposes an additional burden on the CPU and is not conducive to the continuity of transmission

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