4.7.3.10
SYSPROTECT - System control write protection register
This register disables the System Controller registers write protection for a single
write access, hence protecting the System Controller registers against
unintentional write accesses.
Before writing to any System Controller register SYSPROTECT must be written
with 0000 00A5
H
. After that only one write access to the System Controller
address range is allowed.
Reading of SYSPROTECT returns an undefined value.
After any reset the write protection is enabled.
Access
This register can be written in 32-bit units.
Address
<SysC_Base> + 2C
H
Initial Value
none
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
SYSPROTECT[31:16]
W
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
SYSPROTECT[15:0]
W
Bit
Bit name
Function
31 to 0
SYSPROTECT
[31:0]
0000 00A5
H
must be written to SYSPROTECT[31:0] for deactivating the write protection
of all System Controller registers for the next write access to all System Controller
registers.
Chapter 4
System Controller
118
Preliminary User's Manual S19203EE1V3UM00
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