RM0453 Rev 5 113/1450
RM0453 Embedded flash memory (FLASH)
154
Note: The ICACHE and DCACHE must be flushed only when disabled (ICEN or DCEN = 0).
4.4 FLASH option bytes
4.4.1 Option bytes description
The option bytes can be read from the memory locations listed in the table below or from the
following option byte registers:
• FLASH option register (FLASH_OPTR)
• FLASH PCROP zone A start address register (FLASH_PCROP1ASR)
• FLASH PCROP zone A end address register (FLASH_PCROP1AER)
• FLASH PCROP zone B start address register (FLASH_PCROP1BSR)
• FLASH PCROP zone B end address register (FLASH_PCROP1BER)
• FLASH WRP area A address register (FLASH_WRP1AR)
• FLASH WRP area B address register (FLASH_WRP1BR)
• FLASH IPCC mailbox data buffer address register (FLASH_IPCCBR)
• FLASH CPU2 access control register (FLASH_C2ACR)
• FLASH secure SRAM start address and CPU2 reset vector register (FLASH_SRRVR)
Table 16. Option bytes organization
Address
(1)
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
0x1FFF 7800
C2BOOT_LOCK
BOOT_LOCK
Res.
Res.
nBOOT0
nSWBOOT0
SRAM_RST
SRAM2PAR
nBOOT1
Res.
Res.
Res.
WWDG_SW
IWDG_STDBY
IWDG_STOP
IWDG_SW
Res.
nRST_SHDW
nRST_STDBY
nRST_STOP
BOR_LEV[2:0]
ESE
RDP[7:0]
0x1FFF 7808
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
PCROP1A_STRT[7:0]
0x1FFF 7810
PCROP_RDP
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
PCROP1A_END[7:0]
0x1FFF 7818
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
WRP1A_END[6:0]
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
WRP1A_STRT[6:0]
0x1FFF 7820
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
WRP1B_END[6:0]
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
WRP1B_STRT[6:0]
0x1FFF 7828
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
PCROP1B_STRT[7:0]
0x1FFF 7830
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
PCROP1B_END[7:0]
0x1FFF 7838
to
0x1FFF 7860
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
0x1FFF 7868
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
IPCCDBA[13:0]
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