ST STM32F410

RM0401 Rev 3 59/771
RM0401 Embedded Flash memory interface
68
Figure 6. PCROP levels
The deactivation of the SPRMOD and/or the unprotection of PCROPed user sectors can
only occur when, at the same time, the RDP level changes from 1 to 0. If this condition is not
respected, the user option byte modification is canceled and the write error WRPERR flag is
set. The modification of the users option bytes (BOR_LEV, RST_STDBY, ..) is allowed since
none of the active nWRPi bits is reset and SPRMOD is kept active.
Note: The active value of nWRPi bits is inverted when PCROP mode is active (SPRMOD =1).
,EVEL
,EVEL
2$0X##
2$0X!!
2$0X##
DEFAULT
5SEROPTIONSECTORERASE
0ROGRAMNEWOPTIONS
'LOBALMASSERASE
5SEROPTIONSECTIONERASE
0ROGRAMNEWOPTIONS
7RITEOPTIONS
30-/$ACTIVE
ANDVALIDN720I
.ORESTRICTIONON
7RITEOPTIONS
7RITEOPTIONS
30-/$ACTIVE
ANDVALIDN720I
,EVEL
2$0X!!
7RITEOPTIONS
30-/$ACTIVE
ANDVALIDN720I
7RITEOPTIONS
30-/$ACTIVE
ANDVALIDN720I
7RITEOPTIONS
30-/$ACTIVE
ANDVALIDN720I
6ALIDN720IMEANSTHATNONEOFTHEN720BITSSETCANBERESETTRANSITIONFROMTO
-36