Flow Of Control - STMicroelectronics SPC572L series Reference Manual

RM0400
volatile memory. During the BAF start-up procedure, it initializes this section of memory
so that there is no ECC error when BAF accesses this memory area.
52.2.3

Flow of control

Figure 917
the following sections.
reset vector
lifecycle == "FAIL_ANALYSIS"?
n
Program DCF Clients/secure
watchdog
search boot header
boot header found?
n
lifecycle is < "IN_FIELD"?
n
Destructive Reset
1
Serial boot is not available on all devices. Please check the product reference manual for details.
52.2.4 Initialization of BAF DCF clients
52.2.4.1 'Soft' DCF clients
DCF clients are 32-bit hardware registers that are written by the SSCM during reset with
data that is stored in DCF record format in UTEST region of flash memory. These DCF
records are used to configure module registers, and select device operating modes.
shows the overall flow of control in the BAF. The individual steps are explained in
Figure 917. Flow of control
Service Watchdog
y
y
y
serial boot
DocID027809 Rev 4
disable BAF execution access
1
boot from Internal flash
Boot Assist Flash (BAF)
1545/2058
1559