Embedded Flash memory (FLASH) for category 2 devices RM0440
198/2126 RM0440 Rev 4
Programming errors
Several kind of errors can be detected. In case of error, the Flash operation (programming
or erasing) is aborted.
• PROGERR: Programming Error
In standard programming: PROGERR is set if the word to write is not previously erased
(except if the value to program is full zero).
• SIZERR: Size Programming Error
In standard programming or in fast programming: only double word can be
programmed and only 32-bit data can be written. SIZERR is set if a byte or an half-
word is written.
• PGAERR: Alignment Programming error
PGAERR is set if one of the following conditions occurs:
– In standard programming: the first word to be programmed is not aligned with a
double word address, or the second word doesn’t belong to the same double word
address.
– In fast programming: the data to program doesn’t belong to the same row than the
previous programmed double words, or the address to program is not greater than
the previous one.
• PGSERR: Programming Sequence Error
PGSERR is set if one of the following conditions occurs:
– In the standard programming sequence or the fast programming sequence: a data
is written when PG and FSTPG are cleared.
– In the standard programming sequence or the fast programming sequence:
MER1, and PER are not cleared when PG or FSTPG is set.
– In the fast programming sequence: the Mass erase is not performed before setting
FSTPG bit.
– In the mass erase sequence: PG, FSTPG, and PER are not cleared when MER1 is
set.
– In the page erase sequence: PG, FSTPG, MER1 are not cleared when PER is set.
– PGSERR is set also if PROGERR, SIZERR, PGAERR, WRPERR, MISSERR,
FASTERR or PGSERR is set due to a previous programming error.
• WRPERR: Write Protection Error
WRPERR is set if one of the following conditions occurs:
– Attempt to program or erase in a write protected area (WRP) or in a PCROP area
or in a Securable memory area.
– Attempt to perform an erase when one page or more is protected by WRP or
PCROP.
– The debug features are connected or the boot is executed from SRAM or from
System flash when the read protection (RDP) is set to Level 1.
– Attempt to modify the option bytes when the read protection (RDP) is set to
Level 2.
• MISSERR: Fast Programming Data Miss Error
In fast programming: all the data must be written successively. MISSERR is set if the
previous data programmation is finished and the next data to program is not written yet.
• FASTERR: Fast Programming Error
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