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PM0073 数据表(PDF) 23 Page - STMicroelectronics

部件名 PM0073
功能描述  STM32Wxxx Flash memory microcontrollers
PDF  34 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

PM0073 数据表(HTML) 23 Page - STMicroelectronics

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PM0073
Reading/programming the STM32Wxxx embedded Flash memory
Doc ID 17766 Rev 5
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Table 10.
Description of the option bytes and customer specific data for 192- and
256- Kbyte devices (continued)
Flash memory
address
Option bytes
0x0804 0800
Bits [31:24]
nRsvd0
Bits [23:16]
Rsvd0: Reserved, do not use (stored in FLASH_OBR[9:2])
Bits [15:8]:
nRDP
Bits [7:0]:
RDP: Read protection option byte
The read protection helps the user protect the software code stored in Flash
memory. It is activated by setting the RDP option byte.
When this option byte is programmed to a correct value (RDPRT key = 0x00A5),
read access to the Flash memory is allowed.
(The result of RDP level enabled/disabled is stored in FLASH_OBR[1].)
0x0804 0804
Rsvdx: Reserved, do not use.
Bits [31:24]: ]
nRsvd2
Bits [23:16]: ]
Rsvd2 (stored in FLASH_OBR[25:18])
Bits [15:8]: ]
nRsvd1
Bits [7:0]: ]
Rsvd1 (stored in FLASH_OBR[17:10])
0x0804 0808
WRPx: Flash memory write protection option bytes
Bits [31:24]:
nWRP1
Bits [23:16]:
WRP1 (stored in FLASH_WRPR[15:8])
Bits [15:8]:
nWRP0
Bits [7:0]:
WRP0 (stored in FLASH_WRPR[7:0])
0x0804 080C
WRPx: Flash memory write protection option bytes
Bits [31:24]:
nWRP3
Bits [23:16]:
WRP3 (stored in FLASH_WRPR[31:24])
Bits [15:8]:
nWRP2
Bits [7:0]:
WRP2 (stored in FLASH_WRPR[23:16])
One bit of the user option bytes WRPx is used to protect 2 pages of 2 Kbytes in
main memory block.
–
0: Write protection active
–
1: Write protection not active
In total, 4 user option bytes are used to protect the 192/256-Kbyte main Flash
memory.
WRP0: Write-protects pages 0 to 15
WRP1: Write-protects pages 16 to 31
WRP2: Write-protects pages 32 to 47
WRP3[6:0]: Write-protects pages 48 to 61
WRP3[7]: Write-protects pages 62 to 127
0x0804 0810-
0x08400 0FFF Customer specific data can be set to any value.



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