Once enabled, Prefetch logic keeps fetching the next 128-bit row (4 x 32-bit words) from flash bank. On detecting the discontinuity, the Prefetch buffer will be cleared. A software test can be performed to ascertain the proper behavior of this logic. The following sequence of operation can be performed.

1. Disable the Prefetch mechanism, enable the timer and Watchdog. Execute a particular function which might have linear code and code with multiple discontinuities. Store the time “time_1” (timer value) taken for executing this function.
2. Enable the Prefetch mechanism and execute the same function again. Store the time “time_2” (timer value) taken for executing this function. This value should be less than the time_1 (time_1 > time_2). We can mark this timer value as a GOLDEN value and should expect the same timer values for each run of the same function.
3. Since each flash bank row has 4 x 32 bit words, number of rows fetched from the flash bank varies as per the code alignment within the flash bank. Hence user needs to make sure that the Prefetch logic test function should be aligned/located in particular location within flash to ensure the same timing behavior and does not vary compile to compile.

Similar timer-based profiling can be performed to ascertain proper functioning of the data cache and wait states.