SPI Auto-Boot Mode Detection System
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Solution Overview
Problem
Existing serial peripheral interface (SPI) devices require a 'read' instruction for booting data to a processor, leading to delays of up to 32 clock cycles during system power-up or reset, which hinders efficient data streaming and processor boot-up.
Innovation Solution
An auto-boot mode detection system within the SPI that determines the existence of an auto-boot mode based on serial input data during a predetermined wait state or timeout, allowing data to be bootstrapped to a processor without a read instruction, thereby bypassing the need for processing a 'read' command.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If SPI devices require a read instruction for booting data to processor, then data can be transferred from memory to processor, but boot-up time is delayed by up to 32 clock cycles
Solution Approach 1:
The SPI device is configured to automatically execute data transfer operations without waiting for processor instructions. The auto-boot mode enables the SPI device to begin transferring data from memory to processor immediately upon detecting the need for boot-up, eliminating the delay caused by waiting for the processor to issue read instructions. This preliminary action resolves the technical contradiction by removing the time loss while maintaining operational simplicity.
2Productivity
If SPI device waits for processor read instruction, then proper data transfer protocol is maintained, but system efficiency is reduced during boot-up
Solution Approach 1:
The SPI device is equipped with auto-boot mode capability that allows it to autonomously initiate and execute data transfer operations without processor intervention. The device monitors its own state and automatically activates auto-boot mode when appropriate, enabling self-service operation that improves system efficiency during boot-up while maintaining protocol compliance through properly designed automatic operation sequences.
Data Source
AI summary
Systems and methods of detecting an auto-boot mode and booting data from a serial peripheral interface to a processor without the need of a read instruction utilizing a serial peripheral interface having an auto-boot mode detector are provided. In one embodiment, a serial peripheral interface comprises a serial processing component configured to serially communicate data between the processor and at least two peripherals, and an auto-boot component operably coupled to the serial processing component, comprising an auto-boot mode detector configured to determine whether a boot mode exists based on detecting whether serial input data is received during a predetermined wait state, and configured to selectively boot data to a start address associated with the processor based on the boot mode determination.