Ecc Error Monitoring - STMicroelectronics SPC572L series Reference Manual

RM0400
ADDR
offset
8n + 0h
8n + 4h
There must never be an unprogrammed record in the data structure, as that would be
interpreted as a stop record, so subsequent records would be ignored. This allows
programming the records in several sessions, each time appending new records at the end
of the list, as shown in
No Start Record
No Start Record
No Start Record
No Start Record
No Start Record
Empty flash -> No action
In this case, a record may overwrite a client's value which was already set by a previous
record. However whether such an operation is allowed depends on the rules given for the
client - some clients are write-once, only allow setting bits but not clearing, and so on.
The parity bit (PRTY) is required for some DCF records. The parity scheme used is even
parity, so the number of 1s in the WDATA and PRTY fields needs to be even. (For example,
if the WDATA field has the value 0000_0001h then the PRTY field needs to be set to 1, so
that the total number of 1s is even.)
53.4.2

ECC error monitoring

During flash memory scanning (such as Life Cycle, DCF records, or RCHW), the SSCM will
monitor the flash memory status signals for ECC and other unexpected access errors. If
such an error occurs the SSCM will request a reset.
53.4.3 Boot mode functionality
The device supports the following boot modes for the main boot core:
•
Boot Assisted by Flash (BAF) – the device will boot from UTest NVM Flash Block,
(interface with the HSM if available) and perform device setup.
If booting is not possible with the selected configuration (for example, no Boot ID is found in
the selected boot location) then the device will enter serial boot mode.
Table 893. Series of DCF records in UTEST(Continued)
Figure 934.
Figure 934. Appending DCF records
Start Record
Data Record - CS1, Ad = 0
Data Record - CS2, Ad = 0
Data Record - CS0, Ad = 0
Stop Record
Initial Programming
DocID027809 Rev 4
System Status and Configuration Module (SSCM)
DATA
Data Record - CS0, Ad = 0
Data Record - CS1, Ad = 0
Data Record - CS2, Ad = 0
Data Record - CS0, Ad = 0
Start Record
Stop Record
Extension
1567/2058
1569