Embedded Flash memory (FLASH) RM0351
110/1693 DocID024597 Rev 3
3.7.6 Flash control register (FLASH_CR)
Address offset: 0x14
Reset value: 0xC000 0000
Access: no wait state when no Flash memory operation is on going, word, half-word and
byte access
Bit 3 PROGERR: Programming error
Set by hardware when a double-word address to be programmed contains a
value different from '0xFFFF FFFF' before programming, except if the data to
write is '0x0000 0000'.
Cleared by writing 1.
Bit 2 Reserved, must be kept at reset value.
Bit 1 OPERR: Operation error
Set by hardware when a Flash memory operation (program / erase) completes
unsuccessfully.
This bit is set only if error interrupts are enabled (ERRIE = 1).
Cleared by writing ‘1’.
Bit 0 EOP: End of operation
Set by hardware when one or more Flash memory operation (programming /
erase) has been completed successfully.
This bit is set only if the end of operation interrupts are enabled (EOPIE = 1).
Cleared by writing 1.
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
LOCK
OPT
LOCK
Res. Res.
OBL_
LAUNCH
RD
ERRIE
ERR
IE
EOP
IE
Res. Res. Res. Res. Res. FSTPG
OPT
STRT
STRT
rs rs rc_w1 rw rw rw rw rs rs
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
MER2 Res. Res. Res. BKER PNB[7:0] MER1 PER PG
rw rw rw rw rw rw rw rw rw rw rw rw rw
Bit 31 LOCK: FLASH_CR Lock
This bit is set only. When set, the FLASH_CR register is locked. It is cleared by
hardware after detecting the unlock sequence.
In case of an unsuccessful unlock operation, this bit remains set until the next
system reset.
Bit 30 OPTLOCK: Options Lock
This bit is set only. When set, all bits concerning user option in FLASH_CR
register and so option page are locked. This bit is cleared by hardware after
detecting the unlock sequence. The LOCK bit must be cleared before doing the
unlock sequence for OPTLOCK bit.
In case of an unsuccessful unlock operation, this bit remains set until the next
reset.
Bits 29:28 Reserved, must be kept at reset value.
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