SAM4L_14 Datasheet, PDF (171/176 Pages) ATMEL Corporation – Technology for Ultra-low Power Consumption

ATSAM4L8/L4/L2
12.1.7 FLASHCALW
Corrupted data in flash may happen after flash page write operations.
After a flash page write operation, reading (data read or code fetch) in flash may fail. This
may lead to an expecption or to others errors derived from this corrupted read access.
Fix/Workaround
Before any flash page write operation, each 64-bit doublewords write in the page buffer must
preceded by a 64-bit doublewords write in the page buffer with 0xFFFFFFFF_FFFFFFFF
content at any address in the page. Note that special care is required when loading page
buffer, refer to Section 2.5.9 ”Page Buffer Operations” on page 11.
42023GS–SAM–03/2014
171