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STM32L552CCT3PTR Datasheet(PDF) 24 Page - STMicroelectronics

Part # STM32L552CCT3PTR
Description  Ultra-low-power Arm® Cortex®-M33 32-bit MCUTrustZone®FPU, 165 DMIPS, up to 512 KB Flash memory, 256 KB SRAM, SMPS
PDF  340 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STM32L552CCT3PTR Datasheet(HTML) 24 Page - STMicroelectronics

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Functional overview
STM32L552xx
24/340
DS12737 Rev 6
The RSS is available on all devices, after enabling the TrustZone through the TZEN option
bit.
Refer to the application note Overview secure firmware install (SFI) (AN4992) for more
details.
Refer to Table 3 and Table 4 for boot modes when TrustZone is disabled and enabled
respectively.
When TrustZone is enabled by setting the TZEN option bit, the boot space must be in
secure area. The SECBOOTADD0[24:0] option bytes are used to select the boot secure
memory address.
A unique boot entry option can be selected by setting the BOOT_LOCK option bit, allowing
to boot always at the address selected by SECBOOTADD0[24:0] option bytes. All other boot
options are ignored.
Table 3. Boot modes when TrustZone is disabled (TZEN=0)
nBOOT0
FLASH_
OPTR[27]
BOOT0
pin PH3
nSWBOOT0
FLASH_
OPTR[26]
Boot address option-
bytes selection
Boot area
ST programmed
default value
-
0
1
NSBOOTADD0[24:0]
Boot address defined by
user option bytes
NSBOOTADD0[24:0]
Flash: 0x0800 0000
-
1
1
NSBOOTADD1[24:0]
Boot address defined by
user option bytes
NSBOOTADD1[24:0]
System bootloader:
0x0BF9 0000
1
-
0
NSBOOTADD0[24:0]
Boot address defined by
user option bytes
NSBOOTADD0[24:0]
Flash: 0x0800 0000
0
-
0
NSBOOTADD1[24:0]
Boot address defined by
user option bytes
NSBOOTADD1[24:0]
System bootloader:
0x0BF9 0000



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