Controller in high-speed SPI master mode

In view of defects in the prior art, the present disclosure provides a controller in a high-speed serial peripheral interface (SPI) master mode, where clock signals are provided by a phase locked loop (PLL), and the entire controller includes: a low-speed clock domain and a high-speed clock domain,...

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Bibliographic Details
Main Authors Lan, Tiantian, Hu, Norman Shengfa
Format Patent
LanguageEnglish
Published 07.11.2023
Subjects
AUTOMATIC CONTROL, STARTING, SYNCHRONISATION, OR STABILISATIONOF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
BASIC ELECTRONIC CIRCUITRY
CALCULATING
COMPUTING
COUNTING
ELECTRIC DIGITAL DATA PROCESSING
ELECTRICITY
PHYSICS
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Summary:In view of defects in the prior art, the present disclosure provides a controller in a high-speed serial peripheral interface (SPI) master mode, where clock signals are provided by a phase locked loop (PLL), and the entire controller includes: a low-speed clock domain and a high-speed clock domain, where the PLL provides two main clock signals by different clock frequency dividers, provides a low-speed clock signal to the low-speed clock domain, and provides a high-speed source clock signal to the high-speed clock domain. By such technical solutions in the present disclosure, functions of different clock domains are divided through asynchronization of a high-speed SPI controller, and the function of a high-speed SPI flash access is implemented, thereby saving a read/write time. Especially in an application scenario of an SPI flash boot, the controller can greatly optimize a startup time.
Bibliography:Application Number: US202017636053