lpc1768 maximum speed

[alberto110]

Hi ,
  i have question . the lpc1768 run at 100MHz but the flash can't run at this frequency .
 and there is flash accelerator inside the LPC , but with this peripheral , does the micro can
 run with maximum 100MHz speed ?, and if not why the NXP claims this .
thanks alot .

[dcsmrgun]

While I haven't had a chance to benchmark this, my understanding is that you can run full speed with zero wait states by using the flash memory accelerator as NXP states.

[bigtoy]

It's also my understanding that it will run at full speed using the accelerator. Those accelerators are quite common in the faster Cortex-M processors, and they're basically a combination of a look-ahead cache and a very wide-bus flash memory interface. So they read multiple instructions ahead of time and store them in RAM, ready for when the processor needs its next instruction.

[alberto110]

It's also my understanding that it will run at full speed using the accelerator. Those accelerators are quite common in the faster Cortex-M processors, and they're basically a combination of a look-ahead cache and a very wide-bus flash memory interface. So they read multiple instructions ahead of time and store them in RAM, ready for when the processor needs its next instruction.

but , do you mean that we should run the program from SRAM ? . my program entirely programed into flash !

[dcsmrgun]

but , do you mean that we should run the program from SRAM ? . my program entirely programed into flash !

I could be wrong but I think this is just a thing that the accelerator facilitates, so it won't matter. It will throw whatever it needs into RAM regardless.

Now you've piqued my interest and I think I know what my next project will be