RM0367 Rev 7 139/1043
RM0367 Firewall (FW)
141
5.4.5 Volatile data segment start address (FW_VDSSA)
Address offset: 0x10
Reset value: 0x0000 0000
5.4.6 Volatile data segment length (FW_VDSL)
Address offset: 0x14
Reset value: 0x0000 0000
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
Res. Res. Res. Res. Res. Res. Res. Res. Res. Res. Res. Res. Res. Res. Res. Res.
15141312111098 7 6543210
ADD[15:6] Res. Res. Res. Res. Res. Res.
rw
Bits 31:16 Reserved, must be kept at the reset value.
Bits 15:6 ADD[15:6]: Volatile data segment start address
The LSB bit of the start address (bits 5:0) are reserved and forced to 0 in order to allow a
64-byte granularity.
Note: These bits can only be written before enabling the Firewall. Refer to Section 5.3.5:
Firewall initialization.
Bits 5:0 Reserved, must be kept at the reset value.
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
Res. Res. Res. Res. Res. Res. Res. Res. Res. Res. Res. Res. Res. Res. Res. Res.
1514131211109876543210
LENG[15:6] Res. Res. Res. Res. Res. Res.
rw
Bits 31:16 Reserved, must be kept at the reset value.
Bits 15:6 LENG[15:6]: Volatile data segment length
LENG[15:6] selects the size of the volatile data segment expressed in bytes but is a multiple
of 64 bytes.
The segment area is defined from {ADD[15:6],0x00} to {ADD[15:6]+LENG[15:6], 0x00} - 0x01
Note: If LENG[15:6] = 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 5:0 Reserved, must be kept at the reset value.
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