I’m working with the STM32U575 and I found in the datasheet that the Flash programming time for a 128-bit (16-byte) write is:
118 µs in normal mode
48 µs in burst mode
(From Table 86: Flash memory characteristics)
Before finalizing our design, I need clarification on how these timing values apply in practice:
Is the 128-bit programming time the total time per write operation, or is there additional overhead (such as “opening/closing a page” or internal setup time) that needs to be added?
If I write multiple 128-bit words sequentially, do I pay the 118/48 µs each time, or is there any extra per-sequence delay?
Are there any alignment requirements beyond 128-bit (16-byte) alignment?
Do these programming times assume the Flash page is already erased?
We plan to evaluate whether the internal Flash write speed will meet our throughput needs, so I want to be sure I understand all timing components correctly.
Thanks!
