Planning Secure Write Protection - STMicroelectronics SPC572L series Reference Manual

RM0400
Warning:
31.8.2

Planning secure write protection

Up to four levels of password-secured write protection can be assigned to any block. Note
that by default, all blocks of user flash are write protected, so this could be more accurately
viewed as planning which blocks of user flash will not have four levels of password-secured
write protection. The write protection desired will depend on the usage of the flash blocks.
Before creating DCF records to implement secure write protection, please thoroughly review
the implementation steps detailed in
and Table 71: DCF client list
31.8.3 Planning secure read protection
Up to four levels of password-secured write protection can be assigned to flash blocks in
pre-defined Read Locking groups. Note that by default, all blocks of user flash are read
protected, so this could be more accurately viewed as planning which blocks of user flash
will not have four levels of password-secured read protection. The read protection desired
will depend on the usage of the flash blocks. Before creating DCF records to implement
secure read protection, please thoroughly review the implementation steps detailed in
Section 31.4.1: Implementing secure read protection
Chapter 8: Device Configuration Format (DCF)
31.8.4 Planning debug port enable/disable
Please see
Chapter 8: Device Configuration Format (DCF)
31.8.5 Planning OTP flash memory block assignment
Any block of user flash can be configured as OTP. The need to configure blocks as OTP will
depend on the data or code to be stored in the block. It is important to note that configuring
a flash block as OTP is not reversible.
Before creating DCF records to implemented OTP flash blocks, please thoroughly review
the implementation steps detailed in
client list
31.8.6 Planning factory test mode disable
Please see
Chapter 8: Device Configuration Format (DCF)
The password fields are in OTP UTEST flash, so they can
only be written once.
in
Section 31.5: Debug port enable/disable
in Chapter 8: Device Configuration Format (DCF)
Section 31.7: Implementing test mode disable
DocID027809 Rev 4
Flash Memory Programming and Configuration
Section 31.3.1: Implementing secure write protection
Chapter 8: Device Configuration Format (DCF)
Records.
Records.
Section 31.6: Implementing OTP
Records.
and Table 71: DCF client list
and Table 71: DCF client list
and
Records.
and Table 71: DCF client list
Records.
in
in
Table 71: DCF
in
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