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Flash access times

Question asked by on Oct 2, 2010
Latest reply on Oct 2, 2010 by
  Hi everyone,

  I have acquired the discovery board and done a small test, after configuring the ST standard peripheral library for the value line device and 24MHz clock.
  I toggle the LED pin(PC8) in a infinite while loop and seem to see with the oscilloscope only 81ns for every executed instruction, this is half the speed I was expecting.
  Am I missing something?
  The prefetch buffer is not configured in peripherall library for this device, I assume that the internal flash should be fast enough to hold 41.3ns access times. Have I got this wrong somehow?
   Any suggestions?

  Thank you!

P.S. Code was written in assembler so I don't have any overhead from peripherall library.