DocID5833 Rev 2

11/19

AN1015

Preventive techniques

18

2.8

Redundant data storage and exchange

All the data stored in the internal or external memory can be subject to corruption due to

electromagnetic disturbance in extreme conditions.

The preventive technique of storing doubled complementary values at nonadjacent memory

areas, storing and checking the parity bits or ECC are all advanced methods which help to

identify and/or correct the data corruption.

Refer to AN4435 or safety manuals for more details on techniques improving software

robustness available at st.com.

Unused interrupt

management

Avoid runaways due to

unexpected interrupts

None

Very easy (see

Section 2.4)

Refreshing of critical

registers

Safe running

Uses MCU resources

Refresh critical

registers in frequently-

executed loops

Table 1. Summary of preventive techniques (continued)

Software Quality

Preventive techniques

Advantage

Disadvantage

Implementation