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SPI maximum frequency

Question asked by Anders Esbensen on Aug 23, 2017
Latest reply on Aug 24, 2017 by Hui_Ma

Regarding K26P169M180SF5 SPI bus speed:

 

From the datasheet the maximum SPI frequency (Master mode) is specified for two voltage ranges:

 

2.7V < Vcc < 3.6V: 30MHz

1.71V< Vcc < 3.6V: 15MHz

 

For our application, running at 1.8V, this becomes a problem!

 

What is the limiting factor for the maximum SPI frequency and would it be possible to run the SPI at 30MHz even when Vcc=1.8V?

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