AnsweredAssumed Answered

long delay between chars when using SPI(FRDM-K64F)

Question asked by ling Q on Jun 24, 2015
Latest reply on Jun 28, 2015 by ling Q

Hi there,


Has anyone met a problem when setting SPI delays (delay between chars) in Processor Expert?


My project is sending some data to a DAC via SPI and I used PE to do the settings. When the clock rate is around 1MHz, everything works fine and I can set the delay between chars to around 1.44us. However, when I increase the clock rate to a higher frequency, say 10MHz, and remain the delay between chars to 1.44us, the delay I get from logic analyzer becomes 5us.


I didn't change any code or settings except the clock rate, so I am really confused about this situation.

Anyone has any idea about this problem?