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STM32L552CCT3PTR 데이터시트(PDF) 25 Page - STMicroelectronics

부품명 STM32L552CCT3PTR
상세설명  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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제조업체  STMICROELECTRONICS [STMicroelectronics]
홈페이지  http://www.st.com
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STM32L552CCT3PTR 데이터시트(HTML) 25 Page - STMicroelectronics

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DS12737 Rev 6
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STM32L552xx
Functional overview
78
The boot address option bytes enables the possibility to program any boot memory address.
However, the allowed address space depends on Flash read protection RDP level.
If the programmed boot memory address is out of the allowed memory mapped area when
RDP level is 0.5 or more, the default boot fetch address is forced to:
•
0x0800 0000 (when TZEN = 0)
•
RSS (when TZEN = 1)
Refer to Table 5.
Table 4. Boot modes when TrustZone is enabled (TZEN=1)
BOOT_
LOCK
nBOOT0
FLASH_
OPTR[27]
BOOT0
pin
PH3
nSWBOOT0
FLASH_
OPTR[26]
RSS
command
Boot address
option-bytes
selection
Boot area
ST
programmed
default value
0
-0
1
0
SECBOOTAD
D0[24:0]
Secure boot address
defined by user option
bytes
SECBOOTADD0[24:0]
Flash:
0x0C00 0000
-
1
1
0
N/A
RSS: 0x0FF8 0000
RSS:
0x0FF8 0000
1-
0
0
SECBOOTAD
D0[24:0]
Secure boot address
defined by user option
bytes
SECBOOTADD0[24:0]
Flash:
0x0C00 0000
0-
0
0
N/A
RSS: RSS:
0x0FF8 0000
RSS:
0x0FF8 0000
--
-
≠
0N/A
RSS: RSS:
0x0FF8 0000
RSS:
0x0FF8 0000
1-
-
-
-
SECBOOTAD
D0[24:0]
Secure boot address
defined by user option
bytes
SECBOOTADD0[24:0]
Flash:
0x0C00 0000
Table 5. Boot space versus RDP protection
RDP
TZEN = 1
TZEN = 0
0
Any boot address
Any boot address



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