RM0367 Datasheet, PDF (135/1009 Pages) STMicroelectronics – This reference manual targets application developers

Firewall (FW)
RM0367
5.4.3
Non-volatile data segment start address (FW_NVDSSA)
Address offset: 0x08
Reset value: 0x0000 0000
31
30
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24
23
22
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17
16
Res. Res. Res. Res. Res. Res. Res. Res.
ADD[23:16]
rw
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1
0
ADD[15:8]
Res
Res Res Res Res Res Res Res
rw
Bits 31:24 Reserved, must be kept at the reset value.
Bits 23:8 ADD[23:8]: Non-volatile data segment start address
The LSB bits of the start address (bit 7:0) are reserved and forced to 0 in order to allow a
256-byte granularity.
Note: These bits can only be written before enabling the Firewall. Refer to Section 5.3.5:
Firewall initialization.
Bits 7:0 Reserved, must be kept at the reset value.
5.4.4
Non-volatile data segment length (FW_NVDSL)
Address offset: 0x0C
Reset value: 0x0000 0000
31
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23
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Res. Res. Res. Res. Res. Res. Res. Res. Res. Res.
LENG[21:16]
rw
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0
LENG[15:8]
Res. Res. Res. Res. Res. Res. Res. Res.
rw
Bits 31:22 Reserved, must be kept at the reset value.
Bits 21:8 LENG[21:8]: Non-volatile data segment length
LENG[21:8] selects the size of the Non-volatile data segment expressed in bytes but is a
multiple of 256 bytes.
The segment area is defined from {ADD[23:8],0x00} to {ADD[23:8]+LENG[21:8], 0x00} - 0x01
Note: If LENG[21:8] = 0 after enabling the Firewall, this segment is not defined, thus not
protected by the Firewall.
These bits can only be written before enabling the Firewall. Refer to Section 5.3.5:
Firewall initialization.
Bits 7:0 Reserved, must be kept at the reset value.
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