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LPC55S69 : wakeup due SPI3

Question asked by Eugene Hiihtaja on Jan 27, 2020
Latest reply on Feb 1, 2020 by xiangjun.rong

Hi !

 

SPI3 can be used as wakeup source for exit from PowerDown mode. And it works fine.

But RX fifo has size 8 items only and wakeup take > 350 us.

It means , MCU can't receive any more bytes until SPI ISR can be processed.

 

So I shouln't expect if more than 8 items will be in Fifo until exit from PowerDown is fully completed.

 

Is this so ? Or for wakeup more RX fifo can be allocated some how ?

 

Regards,

Eugene

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