Dcf Clients - STMicroelectronics SPC572L series Reference Manual

Password and Device Security Module (PASS)
Once a password group is unlocked, software can set or clear any of the lock bits in the
group, by writing to the registers.
The resulting lock status of a Flash block is determined by the combination of the lock bits of
all password groups. If a block is locked in multiple groups, then all lock bits for the block
need to be cleared before program and erase is possible.. However, unless the life cycle is
older than OEM Production, the Flash blocks are always unlocked regardless of the values
in the password groups.
For operation of the region read protect feature, refer to
Protection.
Once a censored device enters the Failure Analysis life cycle, read protection is active
regardless whether the system is in debug mode or not. It is still possible to unlock Flash
regions with the correct passwords, however. .
68.3

DCF clients

The following table shows the DCF clients for the PASS.
Where a DCF client is listed, the reset value of that register may automatically be pre-
loaded during reset based on the data stored in DCF Records in Flash UTEST region.
The address of the DCF client is local to the PASS module and must be qualified with the
appropriate Client Select (CS[14:0]) for the PASS module, as defined in the DCF Record
Section of the Reference Manual .
Offset
None Censorship
68.3.1 Censorship
Censorship is a DCF client that is not accessible by software. It is automatically pre-loaded
during reset with data stored in DCF Record format in the Flash UTEST region. The
Censorship DCF client defines whether the MCU is censored or not.
2006/2058
Table 1136. PASS DCF clients
Register
Censorship
DocID027809 Rev 4
Section 68.4.3: Flash Memory Read
Access Reset Value
None 0x0000_0000
RM0400
DCF Client
Address Section/Page
(ADDR[14:0])
0x00B0 68.3.1/2006